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Author Topic: Powersoft 30" Woofer  (Read 20632 times)

Nikhil Mulay

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Re: Powersoft 30" Woofer
« Reply #10 on: August 21, 2013, 01:01:22 am »

  I remember attending a small seminar by Andy Munro last year where he showed a picture of a studio he designed in the 80's with a 30" woofer. He did mention which driver it was but the details escape me. According to specs it went down to 10hz!!
   They had to build a concrete baffle just to mount it.
    I think it was based in Denmark but again my memory is foggy on that. I do remember him saying that U2 had mixed one of their earlier albums there. They are still using it apparently!
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Art Welter

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Re: Powersoft 30" Woofer
« Reply #11 on: August 21, 2013, 12:14:52 pm »

  I remember attending a small seminar by Andy Munro last year where he showed a picture of a studio he designed in the 80's with a 30" woofer. He did mention which driver it was but the details escape me. According to specs it went down to 10hz!!
Nikhil,

The EV 30W (also distributed by University sound) was available in the 1980's. It has about 1/10th the excursion (Xmax) and power handling of current state of the art drivers.
It used the same voice coil and magnet structure as the EV SRO 12 and 15 inch speakers, but used a Styrofoam cone similar in thickness to a disposable coffee cup.

The EV 30W had sensitivity of 100 dB one watt one meter, at full power (150 watts) in a 300 cubic foot (8490 liter) cabinet it would be around -13 dB at 10 Hz, about 110 dB.

110 dB at 10 Hz sounds about as loud as 20 dB at 1000 Hz, around the level of a mosquito at a few meters distance.

Art
« Last Edit: August 21, 2013, 12:25:53 pm by Art Welter »
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Ivan Beaver

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Re: Powersoft 30" Woofer
« Reply #12 on: August 21, 2013, 12:48:14 pm »


The EV 30W had sensitivity of 100 dB one watt one meter, at full power (150 watts) in a 300 cubic foot (8490 liter) cabinet it would be around -13 dB at 10 Hz, about 110 dB.

110 dB at 10 Hz sounds about as loud as 20 dB at 1000 Hz, around the level of a mosquito at a few meters distance.

Art
The thing that is so often missed is that as you go low-it has to get REALLY loud to be "heard" and felt.

Every driver ever made can go into the single digits real easy-but how loud is the real question-that is most often just ignored.

Even one speaker manufacturer who advertises how low their cabinets can go-says in their own literature that you can't hear it or feel it-but it will produce those freq  (of course along with all the upper harmonics that overshadow the fundamental tone-but we won't talk about that will we--------------)  I guess those are the "free notes".
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Ivan Beaver
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Keith Broughton

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Re: Powersoft 30" Woofer
« Reply #13 on: August 21, 2013, 05:15:42 pm »

Nikhil,

The EV 30W (also distributed by University sound) was available in the 1980's. It has about 1/10th the excursion (Xmax) and power handling of current state of the art drivers.
It used the same voice coil and magnet structure as the EV SRO 12 and 15 inch speakers, but used a Styrofoam cone similar in thickness to a disposable coffee cup.

The EV 30W had sensitivity of 100 dB one watt one meter, at full power (150 watts) in a 300 cubic foot (8490 liter) cabinet it would be around -13 dB at 10 Hz, about 110 dB.

110 dB at 10 Hz sounds about as loud as 20 dB at 1000 Hz, around the level of a mosquito at a few meters distance.

Art
A buddy of mine, back in the day, built a cabinet with 4 of those!
Big WOW factor but that's about it.
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Daniel Twellmann

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Re: Powersoft 30" Woofer
« Reply #14 on: August 22, 2013, 10:04:00 am »

  I remember attending a small seminar by Andy Munro last year where he showed a picture of a studio he designed in the 80's with a 30" woofer. He did mention which driver it was but the details escape me. According to specs it went down to 10hz!!
   They had to build a concrete baffle just to mount it.
    I think it was based in Denmark but again my memory is foggy on that. I do remember him saying that U2 had mixed one of their earlier albums there. They are still using it apparently!

That would probably be the Puk Studios
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drew gandy

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Re: Powersoft 30" Woofer
« Reply #15 on: August 28, 2013, 09:37:11 pm »

the big 30" ! bigger than Steven Tylers big 10" ! bigger than Superman's model locomotive !

Is there significance to the fact that the left and right feet don't match?  Just curious. 
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Nikhil Mulay

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Re: Powersoft 30" Woofer
« Reply #16 on: August 30, 2013, 02:56:49 pm »

Nikhil,

The EV 30W (also distributed by University sound) was available in the 1980's. It has about 1/10th the excursion (Xmax) and power handling of current state of the art drivers.
It used the same voice coil and magnet structure as the EV SRO 12 and 15 inch speakers, but used a Styrofoam cone similar in thickness to a disposable coffee cup.

The EV 30W had sensitivity of 100 dB one watt one meter, at full power (150 watts) in a 300 cubic foot (8490 liter) cabinet it would be around -13 dB at 10 Hz, about 110 dB.

110 dB at 10 Hz sounds about as loud as 20 dB at 1000 Hz, around the level of a mosquito at a few meters distance.

Art
   I stand corrected! Didn't know much about the drivers except what was said at the seminar.
   I was in awe seeing the size of those woofers! :-)
   Guess bragging rights go a long way..
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ron lavenski

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Re: Powersoft 30" Woofer
« Reply #17 on: August 30, 2013, 05:56:34 pm »

had 2 ev-30 back in the 80's,cabs were each 500lbs front abd back were a full sheet of ply wood 8ftx4ft,32" wide,only used them 2 times had to get 2nd truck just to haul them,didn't take much power,but u could feel them more than hear them,think I know where 1 still is.had to turn them over weekly as the cone sagged,if I remember right
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Jens Palm Bacher

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Re: Powersoft 30" Woofer
« Reply #18 on: September 04, 2013, 04:03:18 pm »

« Last Edit: September 04, 2013, 04:07:17 pm by Jens Palm Bacher »
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Ivan Beaver

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Re: Powersoft 30" Woofer
« Reply #19 on: September 04, 2013, 06:44:37 pm »

It's a Fostex 30"; http://www.fostexinternational.com/docs/speaker_components/pdf/fw800hs.pdf

Fostex still makes a very large woofer (not sure the exact size-maybe 27"?)

However it is REALLY expensive.
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A complex question is easily answered by a simple-easy to understand WRONG answer!

Ivan Beaver
Danley Sound Labs

PHYSICS- NOT FADS!

ProSoundWeb Community

Re: Powersoft 30" Woofer
« Reply #19 on: September 04, 2013, 06:44:37 pm »


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