Re: Close-here's the real dope.

66.192.104.1

Posted by SSL Tech on December 19, 2002 at 07:52:06

In Reply to: Close-here's the real dope. posted by Bill Fitzmaurice on December 18, 2002 at 16:33:26:

-Right you are.

In fact my mental 'model' was basically 'muting' one channel of a stereo system, with both channels fed identically. -The original speaker would still be cyclically pumping the same volume of air (imagining a perfect acoustic 'bridge rectifier') except that the second channel would be doing the same, doubling the work done by doubling the volume pumped through twice the piston surface area.

-Same would be achieved by using one piston and doubling it's range of motion... (assuming perfect linear travel, this would be equivalent to a 6.02dB increase...)

Tanks also for the physics of the radiating surface dimension/frequency limit interplay. -Now that you explain it, I see why.

I had always assumed -double power, therefore +3dB, but I suppose a mild analogy might be like horsepower over torque in cars, if only in the fact that so many people mis-grasp the fact that one (hp) is work done, and not a measure of force or power.

-A question for you... When considering the radiating surface area of a horn hf driver, do you consider the throat size, the flare, size, the diaphragm size... My guess would be that it would be a number smaller than the final flare area, varying with the acoustic gain efficiency or impedance matching ability of the horn... but I'm guessing here... (I'm interested by acoustics, but not a specialist by any stretch! -I do like to grasp how things work though!)
-Thanks,
Keith A.

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Follow Ups Full Thread

Topic - additional bass for DJ system - Ben 00:17:52 11/05/02 (18)

Re: additional bass for DJ system - freddyi 23:31:39 11/10/02 (0)

200 to 500 people? - John Escallier 09:42:26 11/06/02 (0)

Re: additional bass for DJ system - mikebake 13:38:14 11/05/02 (15)

money - ben 07:57:14 11/07/02 (14)

Re: money - Bill Wassilak 10:32:03 11/07/02 (0)

Yeah, but - mikebake 08:12:50 11/07/02 (12)

Re: Yeah, but - Bill Fitzmaurice 13:43:22 11/07/02 (11)

Re: Yeah, but - Neil 18:48:57 12/15/02 (2)

Re: Yeah, but - Bill Fitzmaurice 07:48:39 12/16/02 (1)

EVM12L discontinued, - Bill Fitzmaurice 05:35:17 12/17/02 (0)

6dB gain fron double power? - SSL Tech 11:52:28 11/20/02 (7)

Re: 6dB gain fron double power? - Bill Fitzmaurice 12:05:50 11/20/02 (6)

Re: 6dB gain fron double power? - SSL Tech 12:23:23 12/18/02 (5)

Close-here's the real dope. - Bill Fitzmaurice 16:33:26 12/18/02 (4)

Re: Close-here's the real dope. - SSL Tech 07:52:06 12/19/02 (3)

Re: Close-here's the real dope. - Bill Fitzmaurice 13:13:02 12/19/02 (2)

Re: Close-here's the real dope. - SSL Tech 06:36:23 12/20/02 (1)

efficiency relative to radiating area - Bill Fitzmaurice 18:32:00 12/20/02 (0)

Follow Ups

Re: Close-here's the real dope. - SSL Tech 07:52:06 12/19/02 (3)

Re: Close-here's the real dope. - Bill Fitzmaurice 13:13:02 12/19/02 (2)

Re: Close-here's the real dope. - SSL Tech 06:36:23 12/20/02 (1)

efficiency relative to radiating area - Bill Fitzmaurice 18:32:00 12/20/02 (0)

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