This driver is just too much!!

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Circlotron

Circlotron

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Joined 2002
#1
Fostex FW800N. Simulate it for yourself. :bigeyes:
 

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#4
Why is Vas 3200 liters unreasonable? It is a 31.5 INCH woofer equivalent to 80 cm...meaning that it is a *fairly* large woofer.

Check the datasheet as usual and you'll see. I remember this one from way back and it even has lats in the cone to stiffen it.

/UrSv
 
#8
that is LARGE!

UrSv said:
Why is Vas 3200 liters unreasonable? It is a 31.5 INCH woofer equivalent to 80 cm...meaning that it is a *fairly* large woofer.

Check the datasheet as usual and you'll see. I remember this one from way back and it even has lats in the cone to stiffen it.

/UrSv
Click to expand...
The biggest I have read about, so far,
was 21"

halo - needs a bigger room to use such ones! :xeye: :xeye:
 
#10
Don't know if they still make this:

<center>Clarion SRW8000 edgewise voice coil subwoofer
<li>Specs: 80 cm polypropylene cone woofer
<li>Resonance-free aluminium die-cast speaker frame
<li>Symmetrical magnetic circuit principle
<li>Edgewise voice coil (4 Ohm; mono-drive)
<li>Rear-vented pole piece
<li>Dual laminated cloth surround
<li>Gold-plated quick terminals
<li>Non-oxidising lead wires
<li>Fs: 17 Hz / Qts: 0.4 / Vas: 312.9 litres
<li>Recommended crossover frequency: 50 Hz
<li>Efficiency: 97 dB/W/m</center>
<a href="http://www.techtronics.com/uk/shop/695-clarion-voice-coil-subwoofer.html"><center><img src="http://www.techtronics.com/uk/images/automobile/clarion-srw8000.jpg"><br><img src="http://www.techtronics.com/uk/images/automobile/clarion-srw8000-dim.gif" ></center></a>

the site lists £1400.00 each


Regards
James
 
#13
They talk about 80 centimetres which comes quite close to 30" AFAIK. I am convinced they would be capable of moving a lot more air than this 15 year old Fostex model is capable of !!!
BTW: A couple of newer 18" would do the same trick, and maybe even for cheaper.

They once had one of these Magnat drivers in a car-audio demo environment at a "Media Markt" (the mid European version of "Circuit City"). When they ran this thingie even at modest levels you could feel it on your chest throughout the whole store.

At the Swiss high-end show last autumn they were demonstrating a pair of these Magnat vintage-model Speakers. The level setting of the woofer however was not that good. They turned them up way too much in order to sound balanced (they preferred the show effect IMO).

Regards

Charles
 
#19
I have once seen a picture of a woofer (I don't know if you can call it like that since I doubt that it's upper cutoff frequency even comes close to 20 Hz) made by Mitsubishi. It was intended for earth-quake simulations !!!! It had a diameter of 160 cm and it used a field-coil as magnet.

Regarding the horn subwoofer form the link posted by Netlist:
I have not done any calculations on this but from guessing I think the mouths of these horns are way tooooooo small for horns of this expansion rate.


Regards

Charles
 
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