parameters that establish woofer efficiency

Posted by Duke (D) on September 25, 2002 at 12:48:06

In Reply to: Re: Something's gotta give... posted by rick57 on September 24, 2002 at 22:11:27:

Richard -

You wrote: "I'd like to know why a lower efficiency driver gets the same extension in a smaller box - I thought it would be the other way around??"

Three major driver parameters influence the efficiency of a driver (and of course each of these parameters are in turn established by other parameters):

1. Efficiency goes up linearly as Vas goes up.

2. Efficiency goes down linearly as Qes goes down.

3. Efficiency goes up with the CUBE (third power!) of the driver's resonant frequency.

All of these things work against the low bass response in a given box size. If Vas goes up, then the in-box system resonance goes up. If Qes goes down, then the alignment is shifted to one with less bass response. And of course if the driver's resonant frequency goes up, it produces less low bass.

I have an idea for a woofer that I think would come as close as possible to filling your requirements and be within your budget. Please e-mail me at audiokinesis@cox.net and I'll discuss it with you.

Best of luck to you!

Duke

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Follow Ups Full Thread

Topic - high end wide range bass drivers - rick57 00:57:08 09/24/02 (18)

Re: high end wide range bass drivers - thylantyr 11:01:46 09/24/02 (6)

Using Lambda woofers up high - Duke 17:54:37 09/24/02 (5)

Re: Using Lambda woofers up high - thylantyr 22:01:03 09/24/02 (4)

a couple of Lambda comparisons - Duke 06:13:46 09/25/02 (1)

Re: a couple of Lambda comparisons - thylantyr 07:43:31 09/25/02 (0)

Re: Using Lambda woofers up high - rick57 22:35:06 09/24/02 (1)

Re: Using Lambda woofers up high - thylantyr 07:47:13 09/25/02 (0)

Re: high end' full range bass drivers - Magnetar 04:22:18 09/24/02 (6)

Re: high end' full range bass drivers - rick57 22:25:37 09/24/02 (1)

Re: high end' full range bass drivers - Magnetar 06:49:17 09/25/02 (0)

Another PHL open back bass and mid - Edp 07:17:32 09/24/02 (3)

Re: Another PHL open back bass and mid - Magnetar 06:57:39 09/25/02 (0)

Re: Another PHL open back bass and mid - rick57 22:32:06 09/24/02 (1)

Re: Another PHL open back bass and mid - Edp 07:13:49 09/25/02 (0)

Something's gotta give... - Duke 03:26:21 09/24/02 (3)

Re: Something's gotta give... - rick57 22:11:27 09/24/02 (1)

parameters that establish woofer efficiency - Duke 09/25/0212:48:06 09/25/02 (0)

Re:"In my opinion, good dynamics is worth trading off extension for" - mvwine 06:44:18 09/24/02 (0)

Follow Ups

parameters that establish woofer efficiency - Duke 09/25/0212:48:06 09/25/02 (0)

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