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Old 28th April 2010, 10:27 AM   #1
cjcc67 is offline cjcc67  Australia
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Default Watt the?

I don't normally frequent the SS pages however curiosty for bass driving amplifiers had tempted me. Here we question anyione contemplating 100 watts. What do i see there 500w, 900 watt 20 Kw Watts all this about!!!
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Old 28th April 2010, 11:19 AM   #2
godfrey is offline godfrey  South Africa
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Not for easy listening at home!

One or two KW is good for pro sound systems.
(and knuckle-draggers who think it's a good idea to bend car body panels with their subwoofers)

The 20KW one is either a joke or a really bad design. Either way it won't work. If somebody could translate that into Turkish and Arabic, we might put an end to all the "i no english where i can get PCB???" posts in those threads.
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Old 28th April 2010, 12:15 PM   #3
OneyedK is offline OneyedK  Belgium
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Quote:
Originally Posted by cjcc67 View Post
I don't normally frequent the SS pages however curiosty for bass driving amplifiers had tempted me. Here we question anyione contemplating 100 watts. What do i see there 500w, 900 watt 20 Kw Watts all this about!!!
If you want air to move at really low frequencies, solid state, good damping factor and low distortion, you end up with a SS amp of around 400-800 Watts.
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Old 28th April 2010, 02:27 PM   #4
cjcc67 is offline cjcc67  Australia
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Originally Posted by OneyedK View Post
If you want air to move at really low frequencies, solid state, good damping factor and low distortion, you end up with a SS amp of around 400-800 Watts.
I don't think i would want the furniture moving
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Old 28th April 2010, 02:52 PM   #5
Glowbug is offline Glowbug  United States
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Quote:
The 20KW one is either a joke or a really bad design.
Rockford Fosgate® - T15kW

Not quite 20K, but it exists, and works

Not exactly sure what this has to do with tubes, though...
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The machine does not isolate us from the great problems of nature but plunges us more deeply into them. - Antoine de Saint-Exupéry
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Old 28th April 2010, 04:08 PM   #6
B3Nut is offline B3Nut  United States
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How about a 25,000-watt tube audio amplifier? There are some still in use, though usually as backups anymore. Their purpose? Modulators for 50,000-watt AM tube transmitters, usually using the same type of tubes as the transmitter finals. Yes, the modulation transformers are *huge*, almost the size of a small substation transformer.

Todd in Cheesecurdistan
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Old 28th April 2010, 04:17 PM   #7
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There are a couple of 891-R tubes up on Ebay now. 4.5 KW plate dissapation Mu of 8 for the ultimate single ended amp!

Two (2) Westinghouse 891R 891-R Low Mu Triode Tubes - eBay (item 110524731708 end time May-02-10 18:43:20 PDT)


Looks like 2 modulator tubes...
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Old 28th April 2010, 04:55 PM   #8
jfitz57 is offline jfitz57  United States
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Originally Posted by danFrank View Post
Looks like 2 modulator tubes...
Water cooling is the way to go at thet power level unless you want to put the amp in a separate building. In the old days some of the big stations had a pond with a water fountain in fromt of the building. Looked nice but it was actually the heat exchanger for the cooling water.
Google wlw 500 kw if your into that stuff.

Jim
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Old 28th April 2010, 05:42 PM   #9
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look at the specs of that fosgate amp. its 500w pch at 4 ohms. its a 2000watt amp and in car stereo that's not that big of a deal these days with switching amps. they are saying its 15kw as the sum of all channels into .5 ohm load which is really a bogus spec.
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Old 28th April 2010, 06:04 PM   #10
OneyedK is offline OneyedK  Belgium
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Quote:
Originally Posted by cjcc67 View Post
I don't think i would want the furniture moving
You want at least 6dB headroom, so with a 400 Watt SS amp, you end up with a realistic usable 100 Watt... Not that much in the 20-100Hz band, fed into a low efficiëncy, low distortion driver...
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