All language subtitles for S18E12 - Top & Bowler Hats; Solar Water Heaters; Sticky Buns; Electrostatic Speakers (1080p AMZN WEB-DL x265 Garshasp)_track3_[eng]
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Narrator:
Top hats and bowler hats
Both originated in england.
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00:00:55,448 --> 00:00:59,034
The top hat emerged in the late
1700s as a daring new style,
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00:00:59,034 --> 00:01:01,827
Radically higher
Than the flat 3-cornered hat
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00:01:01,827 --> 00:01:03,137
Men wore at the time.
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00:01:03,137 --> 00:01:05,689
Then the bowler
Was invented around 1850,
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00:01:05,689 --> 00:01:08,482
As a lower alternative
To the top hat.
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00:01:10,931 --> 00:01:13,517
Today,
Even women wear bowlers.
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00:01:13,517 --> 00:01:17,965
Top hats remain, by and large,
A masculine fashion statement,
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00:01:17,965 --> 00:01:19,620
Reserved for formal occasions,
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00:01:19,620 --> 00:01:22,137
Although magicians
Are still known to use them
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00:01:22,137 --> 00:01:23,862
To produce rabbits.
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00:01:23,862 --> 00:01:25,310
At the hat factory,
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00:01:25,310 --> 00:01:28,482
Workers spray a fine mist
Of water on hoods,
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00:01:28,482 --> 00:01:31,793
Pre-cut hat forms
Made of 100% wool felt.
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00:01:31,793 --> 00:01:34,000
After the moisture
Penetrates overnight,
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00:01:34,000 --> 00:01:36,137
They steam them
For about two minutes.
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00:01:36,137 --> 00:01:39,275
The moisture and heat deactivate
A chemical stiffener
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00:01:39,275 --> 00:01:40,275
In the felt,
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00:01:40,275 --> 00:01:42,827
Making the material malleable.
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00:01:42,827 --> 00:01:46,275
Then they place the hood
In an aluminum top-hat mold,
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00:01:46,275 --> 00:01:49,413
Which applies heat
And pressure simultaneously.
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00:01:49,413 --> 00:01:53,068
They place a string in a groove
Along the perimeter and pull.
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00:01:53,068 --> 00:01:56,206
This rolls back the edge of
The felt to form a rim.
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00:01:56,206 --> 00:01:58,517
Then they trim off
The excess felt.
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00:01:58,517 --> 00:02:02,034
After about 90 seconds
Of molding
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00:02:02,034 --> 00:02:04,793
At approximately 230 degrees
Fahrenheit,
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00:02:04,793 --> 00:02:07,482
They remove the string
And open her up.
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00:02:07,482 --> 00:02:10,551
The top hat is now dry
And fully shaped.
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00:02:10,551 --> 00:02:13,448
However,
The felt is still malleable.
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So, to re-activate the stiffener
And lock in the shape,
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00:02:16,655 --> 00:02:19,655
They set the hat aside
For about 30 seconds to cool.
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00:02:19,655 --> 00:02:21,000
To make a bowler hat,
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00:02:21,000 --> 00:02:23,551
The process up to that point
Is identical,
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00:02:23,551 --> 00:02:25,965
But with a bowler-shaped mold.
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00:02:25,965 --> 00:02:27,758
For both hat styles,
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00:02:27,758 --> 00:02:29,793
It takes two sets of hands
To pull the hood taut
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00:02:29,793 --> 00:02:31,551
Over the bottom part
Of the mold,
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00:02:31,551 --> 00:02:35,275
To avoid creating pleats
Or creases.
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00:02:39,103 --> 00:02:41,827
There's a separate mold
Not just for each hat style,
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00:02:41,827 --> 00:02:45,931
But for each size of each style.
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00:02:45,931 --> 00:02:49,620
After the bowler comes off
The mold and cools,
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00:02:49,620 --> 00:02:53,241
They give it a second,
More precise trimming.
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00:02:59,000 --> 00:03:01,620
Both styles are finished
The same way.
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00:03:01,620 --> 00:03:04,241
First a seamstress
Takes a wide ribbon,
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00:03:04,241 --> 00:03:06,344
Folds it over the edge
Of the hat,
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00:03:06,344 --> 00:03:10,068
And sews it down on both sides,
Encasing the edge.
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00:03:15,758 --> 00:03:18,896
Another seamstress uses
A gold-leaf stamping machine
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00:03:18,896 --> 00:03:21,862
To apply the traditional british
Milliner's crest
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00:03:21,862 --> 00:03:25,862
And "Made in england"
To the hat's lining.
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00:03:25,862 --> 00:03:29,862
The lining fabric
Is a silk/satin blend.
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00:03:29,862 --> 00:03:33,413
She sews the stamped top piece
To the side piece.
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00:03:33,413 --> 00:03:36,344
The machine automatically pleats
At regular intervals,
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00:03:36,344 --> 00:03:41,448
So the lining will lie flat
Against the hat's crown.
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00:03:41,448 --> 00:03:45,068
Bowler hats are more rigid
Than top hats,
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00:03:45,068 --> 00:03:47,034
So they require an extra
Application of stiffener
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00:03:47,034 --> 00:03:48,448
Inside the crown.
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00:03:52,379 --> 00:03:54,275
Once the stiffener
Dries thoroughly,
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00:03:54,275 --> 00:03:56,241
Which takes the better part
Of a day,
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00:03:56,241 --> 00:04:00,206
The hat is ready to receive
Its elegant lining.
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00:04:00,206 --> 00:04:05,034
They attach it with hot glue,
Which dries almost instantly.
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00:04:08,172 --> 00:04:12,241
Next they cut a strip of leather
To the hat size
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00:04:12,241 --> 00:04:15,655
And sew the ends together with
A decorative zigzag stitch.
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00:04:15,655 --> 00:04:18,068
The leather has been
Specially treated
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00:04:18,068 --> 00:04:21,655
To prevent mildew build-up
Resulting from perspiration.
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00:04:21,655 --> 00:04:25,103
They sew this leather band
To the inside of the hat,
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00:04:25,103 --> 00:04:28,586
At the base of the crown,
Covering the edge of the lining.
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00:04:28,586 --> 00:04:32,000
Not only does this produce
A neat and classy finish,
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00:04:32,000 --> 00:04:35,137
The leather band also makes
The hat more comfortable to wear
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00:04:35,137 --> 00:04:36,413
By cushioning the forehead.
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00:04:41,413 --> 00:04:44,034
Now it's time to finish
The outside of the hat.
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00:04:44,034 --> 00:04:46,586
First they hot-glue
A cotton ribbon
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00:04:46,586 --> 00:04:48,586
Around the base of the crown.
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00:04:55,137 --> 00:04:58,413
Next they glue on
A matching bow.
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00:05:11,862 --> 00:05:15,275
The grand finale
Is a small silk/satin bow
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00:05:15,275 --> 00:05:17,586
On the interior leather band,
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00:05:17,586 --> 00:05:20,413
Then below that,
The manufacturer's label.
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A few taps with the sticky side
Of adhesive tape
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00:05:23,551 --> 00:05:27,241
Easily removes lint, dust,
And wayward strands of hot glue.
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00:05:30,689 --> 00:05:32,517
These elegant toppers
And bowlers
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00:05:32,517 --> 00:05:34,586
Are the product of several
Experienced,
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Skilled craftspeople.
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Hats off to them.
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Narrator:
Domestic water heaters
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Traditionally run
On electricity, natural gas,
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00:05:55,206 --> 00:05:57,275
Or oil,
For which you have to pay
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00:05:57,275 --> 00:05:59,655
And which have
An environmental impact.
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00:05:59,655 --> 00:06:02,413
A newer alternative
Is a solar-energy system.
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00:06:02,413 --> 00:06:04,862
It warms water with the heat
Of the sun,
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00:06:04,862 --> 00:06:08,620
A resource that's not only
Renewable but free of charge.
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00:06:12,448 --> 00:06:15,137
Solar panels absorb
The sun's energy,
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00:06:15,137 --> 00:06:16,275
Heating water,
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00:06:16,275 --> 00:06:18,689
Which a pump circulates
In a closed loop
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00:06:18,689 --> 00:06:20,034
To a heat exchanger.
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00:06:20,034 --> 00:06:22,931
The exchanger then transfers
The incoming heat
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00:06:22,931 --> 00:06:27,758
To the potable water
In the household tank.
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00:06:27,758 --> 00:06:30,896
Inside the solar panels
Are copper strips
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00:06:30,896 --> 00:06:34,482
Electroplated with tin,
Which absorb the sun's heat.
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00:06:34,482 --> 00:06:36,896
The copper surface
Must be pristine
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00:06:36,896 --> 00:06:39,000
For the plating to adhere.
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00:06:39,000 --> 00:06:43,620
Therefore, the first operation
Is a 3-stage cleaning process.
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Tin doesn't adhere directly
To copper,
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So they first electroplate
With nickel,
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Then plate the nickel with tin.
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00:06:53,896 --> 00:06:58,241
The plating is brittle,
So to protect it,
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00:06:58,241 --> 00:07:01,793
The next station sprays on
A thin coat of liquid glass.
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00:07:04,931 --> 00:07:07,655
The strip then passes through
An infrared oven
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00:07:07,655 --> 00:07:10,793
That hardens the glass into
A durable protective shield.
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00:07:10,793 --> 00:07:14,034
As the strip exits the oven,
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00:07:14,034 --> 00:07:16,965
A fiber-optic instrument
Measures reflectivity.
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00:07:16,965 --> 00:07:21,241
The less reflective the surface,
The better it absorbs heat.
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00:07:21,241 --> 00:07:24,482
From there, the strip enters
The welding machine
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00:07:24,482 --> 00:07:27,655
That fuses it to copper tubing
Entering from another feeder.
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00:07:27,655 --> 00:07:33,655
A nozzle sprays cold water
Onto the mated components,
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00:07:33,655 --> 00:07:36,275
Still hot
From the welding process.
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00:07:36,275 --> 00:07:38,482
They're wound onto a giant reel.
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00:07:40,379 --> 00:07:42,689
The reel feeds
A forming machine,
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00:07:42,689 --> 00:07:46,793
Which uses heavy steel rollers
To press ridges into the strip.
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00:07:46,793 --> 00:07:48,448
This increases the surface area,
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00:07:48,448 --> 00:07:51,103
Meaning it compacts more
Heat-absorbing metal
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00:07:51,103 --> 00:07:54,965
Into a given length of strip.
121
00:07:54,965 --> 00:07:57,655
Next, the machine cuts
This continuous fin tube,
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00:07:57,655 --> 00:07:58,862
As it's now called,
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00:07:58,862 --> 00:08:01,275
Into the standard-length pieces
Required
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00:08:01,275 --> 00:08:04,724
To construct the solar panel's
Internal piping.
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00:08:04,724 --> 00:08:08,551
Then, a piece at a time,
It slices 7/10 of an inch
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00:08:08,551 --> 00:08:11,551
Off each end
So the tubing protrudes.
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00:08:11,551 --> 00:08:14,379
Each solar panel contains
10 fin tubes
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00:08:14,379 --> 00:08:18,413
That connect on either side
To a header.
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00:08:18,413 --> 00:08:21,103
To make each header,
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00:08:21,103 --> 00:08:25,965
Workers slide an inch-wide
Copper tube onto a mandrel.
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00:08:25,965 --> 00:08:29,896
Then they punch 10 holes
In the tube,
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00:08:29,896 --> 00:08:32,758
One for each fin tube.
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00:08:34,896 --> 00:08:37,965
They fit the protruding ends
Of the fin tubes
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00:08:37,965 --> 00:08:40,862
Into these holes
And weld the connections.
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00:08:43,344 --> 00:08:46,931
The finished assembly is called
An absorber plate.
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00:08:46,931 --> 00:08:50,344
It's the key component
Of the solar panel.
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00:08:50,344 --> 00:08:51,896
The fins absorb the sun's heat
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00:08:51,896 --> 00:08:54,379
And warm the water
Circulating through the tubes,
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00:08:54,379 --> 00:08:56,655
Down to the heat exchanger.
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00:08:56,655 --> 00:09:00,103
They pressure-test the absorber
By submerging it in water
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00:09:00,103 --> 00:09:02,482
And injecting air
Through the tubes.
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00:09:02,482 --> 00:09:06,034
Any bubbles in the water would
Indicate a leak to be repaired.
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00:09:06,034 --> 00:09:09,689
Now they cover the headers
With a decorative trim
144
00:09:09,689 --> 00:09:11,551
And lay the manifold
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00:09:11,551 --> 00:09:14,827
Into the solar panel's
Insulated aluminum housing.
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00:09:14,827 --> 00:09:17,413
The front is a sheet
Of tempered glass
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00:09:17,413 --> 00:09:21,206
That allows sunlight
To reach the fins inside.
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00:09:21,206 --> 00:09:23,275
After putting caps
On the headers
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00:09:23,275 --> 00:09:25,344
To protect them
During transport,
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00:09:25,344 --> 00:09:28,172
They apply
The manufacturer's label.
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00:09:28,172 --> 00:09:30,241
The solar panel is finished.
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00:09:30,241 --> 00:09:33,448
Now for the other end
Of the system --
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00:09:33,448 --> 00:09:35,344
The heat exchanger.
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00:09:35,344 --> 00:09:39,517
Its tank is made
Of welded stainless steel.
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00:09:41,241 --> 00:09:43,827
It has connections
For the heat-exchanger pipes
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00:09:43,827 --> 00:09:45,931
Running to and from
The water heater,
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00:09:45,931 --> 00:09:48,620
As well as for the pipes
Running the circulating water
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00:09:48,620 --> 00:09:51,586
To and from the solar panels.
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00:09:51,586 --> 00:09:55,275
Workers install the
Heat-exchanger unit in the tank,
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00:09:55,275 --> 00:09:58,103
Then test it for leaks by
Filling the tank with water,
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00:09:58,103 --> 00:10:01,931
Injecting air through the pipes,
And looking for bubbles.
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00:10:01,931 --> 00:10:04,620
If the unit passes
The leak test,
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00:10:04,620 --> 00:10:08,241
They drain the water,
Close the top of the tank,
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00:10:08,241 --> 00:10:11,241
And center it in
An a.B.S. Plastic jacket.
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00:10:11,241 --> 00:10:14,620
Then they inject expanding
Foam insulation
166
00:10:14,620 --> 00:10:18,000
Into the void between
The tank and jacket.
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00:10:20,448 --> 00:10:21,758
How does it all work?
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00:10:21,758 --> 00:10:24,620
The potable cold water
In the home's water heater
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00:10:24,620 --> 00:10:27,758
Circulates through the loop
Inside the exchanger.
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00:10:27,758 --> 00:10:31,000
It absorbs the heat brought in
From the solar panels,
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00:10:31,000 --> 00:10:33,482
Via a completely separate
Set of pipes.
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00:10:33,482 --> 00:10:36,034
The potable hot water
Then exits the exchanger
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00:10:36,034 --> 00:10:39,172
And returns to the water tank.
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00:10:50,724 --> 00:10:52,310
Narrator:
Eat one of these,
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And you'll be sure to find
Yourself in a sticky situation.
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00:10:55,310 --> 00:10:58,241
But no worries --
It's all ooey-gooey fun.
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00:10:58,241 --> 00:11:00,793
A sticky bun
Is all about messy eating.
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00:11:00,793 --> 00:11:04,517
Consuming one is a lip-smacking,
Finger-licking experience --
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00:11:04,517 --> 00:11:07,000
No utensils required.
180
00:11:12,034 --> 00:11:14,448
Sticky buns are sometimes
Called schnecken,
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00:11:14,448 --> 00:11:16,000
Due to their german origins.
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00:11:16,000 --> 00:11:19,344
"Schnecken" is the german word
For snails,
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00:11:19,344 --> 00:11:22,724
Which the cinnamon swirl
On top resembles.
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00:11:22,724 --> 00:11:26,620
They start
With all-purpose flour,
185
00:11:26,620 --> 00:11:29,379
Then blend in a pre-mix
Of sugar, salt,
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00:11:29,379 --> 00:11:30,827
And baking powder.
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00:11:30,827 --> 00:11:33,517
Cream cheese
And butter come next.
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00:11:33,517 --> 00:11:35,827
These fats are
Just the right consistency
189
00:11:35,827 --> 00:11:38,655
For an automated dough hook
To efficiently work them
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00:11:38,655 --> 00:11:41,137
Into the dry ingredients.
191
00:11:41,137 --> 00:11:44,482
An employee then pours milk
Into the blender.
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00:11:44,482 --> 00:11:46,344
It binds the ingredients,
193
00:11:46,344 --> 00:11:48,586
Turning the mix
Into biscuit dough.
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00:11:48,586 --> 00:11:51,448
The dough needs to stay cool
For food-safety reasons,
195
00:11:51,448 --> 00:11:53,551
So they monitor the temperature.
196
00:11:53,551 --> 00:11:56,827
The next worker loads the dough
Into an extruder
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00:11:56,827 --> 00:11:59,448
That squeezes it
Into a wide, flat strip
198
00:11:59,448 --> 00:12:00,931
Called the dough band.
199
00:12:00,931 --> 00:12:03,482
The dough band rides a conveyor
200
00:12:03,482 --> 00:12:05,482
That slopes down
To a narrow channel.
201
00:12:05,482 --> 00:12:07,034
As it enters,
202
00:12:07,034 --> 00:12:10,965
The dough folds over from
The sides, creating two layers.
203
00:12:10,965 --> 00:12:16,103
A roller squeezes
The layers thinner.
204
00:12:16,103 --> 00:12:19,482
A device called the fanner
Now zigzags back and forth
205
00:12:19,482 --> 00:12:22,655
To layer the dough,
Ribbon-style.
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00:12:22,655 --> 00:12:24,379
The layers pile up six deep.
207
00:12:24,379 --> 00:12:27,172
And because they were originally
Two layers,
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00:12:27,172 --> 00:12:30,000
There are now 12 in total.
209
00:12:30,000 --> 00:12:32,000
Metal rollers
Press the pack down
210
00:12:32,000 --> 00:12:33,793
And thin it substantially
211
00:12:33,793 --> 00:12:36,655
Until it's about
2/10 of an inch thick.
212
00:12:39,965 --> 00:12:42,172
Next up
Is the sticky-bun filling,
213
00:12:42,172 --> 00:12:43,724
Called cinnamon schmear.
214
00:12:43,724 --> 00:12:48,655
It starts with blocks of butter
And lots of ground cinnamon.
215
00:12:48,655 --> 00:12:51,344
They add brown sugar
Instead of white.
216
00:12:51,344 --> 00:12:53,793
It has an intense
Molasses flavor
217
00:12:53,793 --> 00:12:57,379
And is stickier
Than white sugar.
218
00:12:57,379 --> 00:13:01,551
Canola oil loosens
And homogenizes the ingredients,
219
00:13:01,551 --> 00:13:04,965
Transforming the mix into
The sugary cinnamon paste
220
00:13:04,965 --> 00:13:06,448
Known as the schmear.
221
00:13:08,310 --> 00:13:10,172
This cinnamon schmear
Is the consistency
222
00:13:10,172 --> 00:13:11,379
Of cake frosting,
223
00:13:11,379 --> 00:13:14,275
So it can be easily pumped
Over to the dough.
224
00:13:17,862 --> 00:13:21,724
A series of nozzles deposit
Dollops of the cinnamon schmear
225
00:13:21,724 --> 00:13:23,517
Onto the sticky-bun dough.
226
00:13:23,517 --> 00:13:26,517
The dough travels
Under a long blade
227
00:13:26,517 --> 00:13:29,241
That spreads
The cinnamon schmear evenly.
228
00:13:29,241 --> 00:13:30,758
A device called a plow
229
00:13:30,758 --> 00:13:34,379
Then lifts the outside edges
And folds them over.
230
00:13:34,379 --> 00:13:38,000
Rollers press down the curled
Edges to tighten them.
231
00:13:38,000 --> 00:13:39,275
Each tightly curled edge
232
00:13:39,275 --> 00:13:41,655
Will now become the center
Of a sticky-bun roll.
233
00:13:41,655 --> 00:13:45,551
Angled rollers
Called rollwinders
234
00:13:45,551 --> 00:13:47,758
Pick up the curled edges
Of the dough
235
00:13:47,758 --> 00:13:50,310
And fold it into two parallel
Cinnamon rolls.
236
00:13:52,275 --> 00:13:56,241
A guillotine blade slices
The parallel rolls into buns,
237
00:13:56,241 --> 00:13:59,310
Creating sets of two.
238
00:13:59,310 --> 00:14:01,896
Meanwhile,
The sweet and sticky topping
239
00:14:01,896 --> 00:14:04,448
Is bubbling away
In a big kettle.
240
00:14:04,448 --> 00:14:07,689
It's made of honey,
Brown sugar, and butter.
241
00:14:07,689 --> 00:14:11,310
This topping actually goes on
The bottom of the baking tray.
242
00:14:11,310 --> 00:14:13,482
They pump it into the container
243
00:14:13,482 --> 00:14:15,758
And then toss in pecans
To give it some crunch.
244
00:14:17,275 --> 00:14:19,758
Putting the topping
On the bottom of the baking tray
245
00:14:19,758 --> 00:14:21,103
Means, of course,
246
00:14:21,103 --> 00:14:23,379
That these sticky buns
Are to be baked upside down,
247
00:14:23,379 --> 00:14:26,724
Once purchased by the consumer.
248
00:14:26,724 --> 00:14:29,482
It's a strategic
Baking technique.
249
00:14:29,482 --> 00:14:31,034
Cooked upside down,
250
00:14:31,034 --> 00:14:35,137
The sticky topping will saturate
The buns for added moisture.
251
00:14:36,896 --> 00:14:39,206
And by not exposing
The topping to direct heat,
252
00:14:39,206 --> 00:14:42,793
It won't burn as it caramelizes
Into a sugary glaze.
253
00:14:48,344 --> 00:14:50,551
The sticky buns now head
Into a tunnel
254
00:14:50,551 --> 00:14:54,275
Chilled by liquid nitrogen
For a very fast freeze.
255
00:14:54,275 --> 00:14:56,137
After about four minutes,
256
00:14:56,137 --> 00:15:00,310
The buns emerge frozen solid,
With the freshness locked in.
257
00:15:03,275 --> 00:15:05,275
The sticky buns then ride
Another conveyor
258
00:15:05,275 --> 00:15:06,448
To the wrapping station.
259
00:15:06,448 --> 00:15:09,862
Here, machinery quickly seals
Plastic film
260
00:15:09,862 --> 00:15:11,827
Around each box of buns,
261
00:15:11,827 --> 00:15:16,275
After which it's into an oven
To heat-shrink the plastic.
262
00:15:16,275 --> 00:15:18,517
It all happens in seconds,
263
00:15:18,517 --> 00:15:22,034
Giving the frozen buns
No time to thaw.
264
00:15:22,034 --> 00:15:25,379
It has taken hours of prep work
At the factory,
265
00:15:25,379 --> 00:15:28,965
But these frozen sticky buns
Are ready for baking.
266
00:15:28,965 --> 00:15:32,068
All the cook has to do
Is pop the tray in the oven,
267
00:15:32,068 --> 00:15:34,655
And the buns will be ready
In 20 minutes.
268
00:15:34,655 --> 00:15:38,862
No need to get your hands sticky
By making them from scratch.
269
00:15:50,241 --> 00:15:52,241
Narrator:
Electrostatic speakers
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00:15:52,241 --> 00:15:54,965
Added a whole new vibe
To the home-music scene.
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00:15:54,965 --> 00:15:57,206
Unlike traditional box speakers,
272
00:15:57,206 --> 00:16:00,758
Electrostatic speakers
Are usually tall and skinny.
273
00:16:00,758 --> 00:16:02,517
And instead of using
An electromagnet
274
00:16:02,517 --> 00:16:03,896
To produce sound,
275
00:16:03,896 --> 00:16:07,344
They rely on conductive layers
Of plastic and metal.
276
00:16:12,551 --> 00:16:14,896
Electrostatic speakers
Generate rich audio
277
00:16:14,896 --> 00:16:17,206
In the high-
And mid-frequency range,
278
00:16:17,206 --> 00:16:19,068
But they lack the thumping bass
279
00:16:19,068 --> 00:16:21,310
Needed for full
Sound reproduction.
280
00:16:21,310 --> 00:16:26,551
To compensate, most are now
Equipped with a woofer.
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00:16:26,551 --> 00:16:27,689
To make the woofer,
282
00:16:27,689 --> 00:16:30,413
A computer-driven router
Cuts out cabinetry parts
283
00:16:30,413 --> 00:16:32,586
From veneered mdf.
284
00:16:35,793 --> 00:16:37,758
The router carves long grooves.
285
00:16:37,758 --> 00:16:40,827
They'll be used to fold it
Into the woofer box.
286
00:16:40,827 --> 00:16:46,310
It also cuts out holes for
A speaker cone and hardware.
287
00:16:46,310 --> 00:16:49,965
A worker glues and drills screws
Into the bottom of the cabinetry
288
00:16:49,965 --> 00:16:52,103
For installing the speaker feet.
289
00:16:57,413 --> 00:16:58,793
He trims the excess
290
00:16:58,793 --> 00:17:01,482
From the edges
Of the cabinetry panel.
291
00:17:03,586 --> 00:17:06,827
He beads high-strength glue
Along the joints
292
00:17:06,827 --> 00:17:10,206
And folds the grooved panel
To create the cabinet box.
293
00:17:10,206 --> 00:17:12,379
The glue is stronger than screws
294
00:17:12,379 --> 00:17:16,068
And acts as a kind of cement
To hold the cabinet together.
295
00:17:16,068 --> 00:17:20,000
He sands the wood veneer at
The joints for a seamless look.
296
00:17:22,551 --> 00:17:24,275
And now it's into
The spray booth
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00:17:24,275 --> 00:17:25,586
For the finishing touch --
298
00:17:25,586 --> 00:17:30,689
A dark, glossy varnish
That accentuates the wood grain.
299
00:17:30,689 --> 00:17:34,379
Once the paint dries,
A technician pads the inside
300
00:17:34,379 --> 00:17:37,275
With a poly-cotton baffle
To reduce resonance.
301
00:17:37,275 --> 00:17:39,275
He then installs
The crossover unit.
302
00:17:39,275 --> 00:17:42,206
It splits the audio signal
To send low notes to the woofer
303
00:17:42,206 --> 00:17:46,068
And the rest to
The electrostatic panel.
304
00:17:46,068 --> 00:17:47,551
Next up is the power supply
305
00:17:47,551 --> 00:17:52,655
And a step-up transformer for
Boosting the amplifier signal.
306
00:17:52,655 --> 00:17:57,551
He attaches the assembly to
The interior wall of the woofer.
307
00:17:59,896 --> 00:18:04,241
He now wires the speaker cone
To the crossover unit.
308
00:18:04,241 --> 00:18:06,931
He inserts the cone
In the slot machined for it,
309
00:18:06,931 --> 00:18:08,241
And it's a perfect fit.
310
00:18:11,206 --> 00:18:14,034
He boosts the bass
With the built-in amplifier.
311
00:18:14,034 --> 00:18:15,724
He wires it to the crossover
312
00:18:15,724 --> 00:18:18,862
And pops it into the back
Of the woofer box.
313
00:18:18,862 --> 00:18:20,103
This woofer is now ready
314
00:18:20,103 --> 00:18:22,034
To be paired up with
Its electrostatic mate.
315
00:18:22,034 --> 00:18:25,000
They make
The electrostatic speaker
316
00:18:25,000 --> 00:18:27,000
From two perforated
Metal panels.
317
00:18:27,000 --> 00:18:31,206
A technician applies a charge
To them to check for thin spots.
318
00:18:31,206 --> 00:18:35,482
Next she bends each one
To a 30-degree curve.
319
00:18:35,482 --> 00:18:39,034
This will allow sound to be
More widely dispersed in a room.
320
00:18:39,034 --> 00:18:41,551
She presses heavy-duty
Double-sided tape
321
00:18:41,551 --> 00:18:42,896
On to the edges
322
00:18:42,896 --> 00:18:46,758
And applies rigid plastic
Strips, called spars, crosswise.
323
00:18:46,758 --> 00:18:52,000
They stiffen the panels to
Withstand electrostatic forces.
324
00:18:52,000 --> 00:18:55,379
She now unfurls thin
But super-tough plastic
325
00:18:55,379 --> 00:18:58,896
And stretches it
To a precise tension.
326
00:18:58,896 --> 00:19:01,413
This plastic is
The speaker diaphragm.
327
00:19:01,413 --> 00:19:04,344
It's been impregnated
With a conductive coating
328
00:19:04,344 --> 00:19:06,344
To respond
To an electrical charge.
329
00:19:06,344 --> 00:19:09,310
She positions one of
The perforated panels
330
00:19:09,310 --> 00:19:10,758
Under the diaphragm.
331
00:19:10,758 --> 00:19:13,758
And with the backing
Of the adhesive tape removed,
332
00:19:13,758 --> 00:19:17,137
She jacks up the table to press
The panel to the plastic.
333
00:19:17,137 --> 00:19:20,965
She attaches wiring
That will deliver the charge
334
00:19:20,965 --> 00:19:24,034
To the diaphragm
And make it vibrate.
335
00:19:24,034 --> 00:19:25,724
She applies more
Double-sided tape
336
00:19:25,724 --> 00:19:27,724
To the other side
Of the diaphragm
337
00:19:27,724 --> 00:19:29,275
And peels off the backing.
338
00:19:29,275 --> 00:19:32,620
Workers position the second
Speaker panel on the diaphragm
339
00:19:32,620 --> 00:19:36,689
And align its fine mesh
With that of the panel below.
340
00:19:36,689 --> 00:19:40,586
They place the speaker sandwich
In a metal capsule
341
00:19:40,586 --> 00:19:42,310
To vacuum-press it together.
342
00:19:42,310 --> 00:19:45,482
They then frame the speaker
With an aluminum border
343
00:19:45,482 --> 00:19:48,379
And add a strut to the middle
For reinforcement.
344
00:19:48,379 --> 00:19:51,689
And now it's time for
The electrostatic speaker
345
00:19:51,689 --> 00:19:53,551
To be joined to the woofer.
346
00:19:53,551 --> 00:19:55,655
The tall, slim
Electrostatic speaker
347
00:19:55,655 --> 00:19:58,068
Will deliver the high
And mid frequencies.
348
00:19:58,068 --> 00:20:02,586
The short, boxy woofer
Will thump out the bass.
349
00:20:02,586 --> 00:20:04,793
Then it's into the test booth
350
00:20:04,793 --> 00:20:06,793
To confirm that the speaker
Has the correct range.
351
00:20:06,793 --> 00:20:09,724
The technician runs
An audio-tone sweep
352
00:20:09,724 --> 00:20:13,034
And checks for any dropouts
In the frequency.
353
00:20:13,034 --> 00:20:14,448
Using a special tool,
354
00:20:14,448 --> 00:20:18,206
He verifies that the sound waves
Of the speaker set are in sync,
355
00:20:18,206 --> 00:20:21,068
A process called phasing.
356
00:20:21,068 --> 00:20:23,310
He then places the speaker
In a padded room
357
00:20:23,310 --> 00:20:25,275
To test a full range of tones.
358
00:20:25,275 --> 00:20:28,448
[ tones pulsing ]
359
00:20:28,448 --> 00:20:31,482
A computer analyzes the tones.
360
00:20:31,482 --> 00:20:35,344
Once it passes all the tests,
361
00:20:35,344 --> 00:20:38,206
This electrostatic speaker
Links up
362
00:20:38,206 --> 00:20:40,206
With the rest
Of the sound system.
363
00:20:40,206 --> 00:20:42,103
It's now ready for its audience.
364
00:20:52,000 --> 00:20:54,241
If you have any comments
About the show,
365
00:20:54,241 --> 00:20:56,896
Or if you'd like to suggest
Topics for future shows,
366
00:20:56,896 --> 00:21:00,896
Drop us a line at...
367
00:21:00,896 --> 00:21:03,965
--captions by vitac--
Www.Vitac.Com
368
00:21:03,965 --> 00:21:06,931
Captions paid for by
Discovery communications
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