Home » Sponsored » Pi Speakers » Perfect Subwoofer for 4 pi
Perfect Subwoofer for 4 pi [message #47185] Thu, 23 June 2005 21:09 Go to next message
Phil Kollmeyer is currently offline  Phil Kollmeyer
Messages: 2
Registered: May 2009
Esquire
I recently completed my 4 pi's, and had planned all along to add a pair of subwoofers to complement them, but I have not decided what the best option is. The subwoofer I've been most impressed with, specification wise, is the VMPS larger subwoofer (VMPSaudio.com). It claims to have a -3dB point of 19 Hz, and output 20Hz at 115 dB with 5% distortion, which is hard to believe. So, before I'd purchase this kit, I'm curious what other subwoofer options would people suggest. I'd like it to be flat to nearly 20Hz, need a box of not much bigger than 8 cubic feet, be relatively efficient, and I have a price cap of about $350 per box. I've looked around a lot, but haven't found anything that really excited me.

You've got mail! [message #47188 is a reply to message #47185] Fri, 24 June 2005 06:45 Go to previous messageGo to next message
Wayne Parham is currently offline  Wayne Parham
Messages: 18787
Registered: January 2001
Illuminati (33rd Degree)

I suggest a JBL 2245 or Magnum 18LF in an 8.0ft3 to 10.0ft3 box tuned to 30Hz. They're the best sounding subs I've heard. Check your mail, I've sent plans.


Re: You've got mail! [message #47189 is a reply to message #47188] Fri, 24 June 2005 07:41 Go to previous messageGo to next message
andreaspaulsen is currently offline  andreaspaulsen
Messages: 7
Registered: May 2009
Esquire
Wayne,
let me have your plans also, you know what i'm doing !

Cheers
andreas

You've got mail too! [message #47190 is a reply to message #47189] Fri, 24 June 2005 08:44 Go to previous messageGo to next message
Wayne Parham is currently offline  Wayne Parham
Messages: 18787
Registered: January 2001
Illuminati (33rd Degree)


I have a VMPS larger [message #47192 is a reply to message #47185] Fri, 24 June 2005 23:14 Go to previous messageGo to next message
swett is currently offline  swett
Messages: 47
Registered: May 2009
Baron
I have a VMPS larger and it sounds nice as a sub, but I can't comment on its max output, because I've never pushed it anywhere close to a point where it sounds stressed. Its certainly not a weenie, as you'd expect with such a large sub with so much Vd.

The 18" woofers Wayne mentioned may be better, but at that point, why not just build the 7Pi-18? It'd probably be cheaper than a 4Pi + the 18" sub? Even if you don't have corners, you could still run the 18" in direct radiator mode.

-Ian

Re: I have a VMPS larger [message #47197 is a reply to message #47192] Sun, 26 June 2005 15:19 Go to previous messageGo to next message
Phil Kollmeyer is currently offline  Phil Kollmeyer
Messages: 2
Registered: May 2009
Esquire
Thanks for the advice Ian. I've already built the 4 pis, and my goal has been to have some remotely transportable speakers. I have a sedan, so moving the monstrous 18" subs Wayne suggests, would be rather challenging. I of course, enjoy giant speakers, but if you recommend the VMPS, that puts one step closer to buying the kit.

I already own a pair of VMPS Tower II speakers though, and have had a very challenging time tuning them for good response. Have you had similar troubles with the Larger Subwoofer?

Phil

Re: I have a VMPS larger [message #47198 is a reply to message #47197] Sun, 26 June 2005 15:32 Go to previous messageGo to next message
swett is currently offline  swett
Messages: 47
Registered: May 2009
Baron
I honestly haven't spent any time tuning it. It sounds good to me, but I only use it under 60hz and I don't have a large enough room to move it around much, especially since its so large.

It sounds better than my huge(12cuft) homebuilt sub which used an 18" woofer in a ported box, but thats what you'd expect for a professionally designed sub.

What is the best way to tune a sub? I was under the impression the radio shack meters weren't very accurate at low frequencies. Also, I don't have any real EQ, so I'm not sure what I could do to it.

-Ian

Wayne: Me too! Me too! [message #47199 is a reply to message #47188] Sun, 26 June 2005 19:04 Go to previous messageGo to next message
elektratig is currently offline  elektratig
Messages: 348
Registered: May 2009
Grand Master
Can I get the sub plans too? Pretty please? Even if I don't use them with my Pis? Thanks.

You've got mail! [message #47200 is a reply to message #47199] Sun, 26 June 2005 22:05 Go to previous messageGo to next message
Wayne Parham is currently offline  Wayne Parham
Messages: 18787
Registered: January 2001
Illuminati (33rd Degree)


Re: I have a VMPS larger [message #47201 is a reply to message #47198] Sun, 26 June 2005 22:13 Go to previous messageGo to previous message
Wayne Parham is currently offline  Wayne Parham
Messages: 18787
Registered: January 2001
Illuminati (33rd Degree)

You can tune fb with impedance measurements. If there are no unusual cabinet features, it should be as predicted by the Helmholtz formula:

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