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Propeller Head Plaza Technical and scientific discussion of amps, cables and other topics. |
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Propeller Head Plaza Technical and scientific discussion of amps, cables and other topics. |
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AJinFLA brought up the subject of a Quadrupole Subwoofer below. I did a little research on the subject of this type of subwoofer, but I got a little lost. I suppose that's not suprising to some here. I believe understand what it does, but still I'm a little confused as to what would be the advantages of a Quadrupole Sub.As I stated before from what I've always understood a Monopole plays in one (mono) direction which typically faces the listeners. A dipole or bipole plays in two (bi) directions which is typically one facing the listener and one reflecting off the rear wall. Of course dipoles & bipoles differ in whether or not the rear wave is in phase or 180 degrees out of phase with the front waver. I also know Omnipoles play essentially in all (omni) directions equally.
Now from what I understand a Quadrupole is essentially two identical dipoles, with opposite phase & separated by a small distance distance. Where I got lost or confused is when I looked at the charts provided in the link below. To me a don't see a major significant difference between a linear Quadrupole over a typical dipole, especially considering the added expenses of additional drives & construction involved!
AJinFLA said he e-mailed Linkwitz to discuss, since no one here seemed interested. I actually was and still am in the interested in the concept & asked him basically what I am asking here. Perhaps someone else will answer this question: What is advantageous about using this Emerald Physics linear Quadrupole sub as opposed to other dipole or bipole subs? I'm not claiming anyone said it was advantageous. I'm asking is it advantageous and why? Just curious...
Thetubeguy1954
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Topic - What Are The Advantages To A Quadrupole Sub? - thetubeguy1954 14:25:57 10/30/06 (13)
- I'd call it a compound dipole -- advantages the same as all dipoles (reduced excitation of some room modes) - Richard BassNut Greene 09:21:31 10/31/06 (8)
- On second thought it's not a compound dipole (but is a subwoofer with cheap ($65 retail) Eminence Alpha 15" drivers! - Richard BassNut Greene 08:29:28 11/03/06 (0)
- Compound dipole +- +- Quadrupole +- -+ - AJinFLA 15:54:35 10/31/06 (4)
- Actually a compound configuration can be either +- +- or +- -+ - Richard BassNut Greene 07:37:24 11/03/06 (0)
- Then A Quadrupole Is Basically An OB Bipolar Design - thetubeguy1954 05:55:23 11/01/06 (2)
- With an open baffle, it's definitely not a bipole design - Richard BassNut Greene 08:53:40 11/01/06 (1)
- Re: With an open baffle, it's definitely not a bipole design - thetubeguy1954 09:30:03 11/01/06 (0)
- Re: I'd call it a compound dipole -- advantages the same as all dipoles (reduced excitation of some room modes) - morricab 14:17:05 10/31/06 (0)
- Re: I'd call it a compound dipole -- advantages the same as all dipoles (reduced excitation of some room modes) - thetubeguy1954 10:07:22 10/31/06 (0)
- Re: What Are The Advantages To A Quadrupole Sub? - andy19191 16:10:29 10/30/06 (3)
- Re: What Are The Advantages To A Quadrupole Sub? - thetubeguy1954 05:52:22 10/31/06 (0)
- Re: What Are The Advantages To A Quadrupole Sub? - Steve Eddy 17:40:41 10/30/06 (1)
- Re: What Are The Advantages To A Quadrupole Sub? - Soundmind 17:51:14 10/30/06 (0)
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