Sounds like an A7 wannabee

Posted by Bill Fitzmaurice (P) on April 22, 2004 at 05:16:39

In Reply to: Re: I don't have that dimensions for that box posted by Bill Wassilak on April 21, 2004 at 15:00:11:

and that being the case I'd opt for the 140, or a 130, or an EV DL15X for that matter. The higher Fs of these compared to a 145 will give a better midrange. Whatever you go with there is a tuning proceedure, similar to the one I use on my DR horns. Mount the woofer and leave the back/access panel off the box and do an impedance sweep; the lower peak, somewhere around 30-40 Hz, is the box Fs(h). Seal the box up and do another sweep; perfect tuning will put an impedance trough at the Fs(h)frequency. Adjust the port size/duct length to get it right. Again, not familiar with the design, so don't know the port configuration.

As to size, this JBL is a pussy. In 1971 we were hauling around a 30 cubic foot expanded Jensen Imperial design loaded with three fifteens-and that was for electric bass. For PA we used A5 variants. Four of them. Haven't been able to walk fully upright ever since.

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Follow Ups Full Thread

Topic - E145 vs E140 - bwilson 09:28:16 04/19/04 (14)

Re: E145 vs E140 - Bill Fitzmaurice 14:11:56 04/19/04 (13)

Re: E145 vs E140 - bwilson 14:19:01 04/19/04 (12)

On the other hand, if you go with a horn loaded 10... - Bill Fitzmaurice 12:50:12 04/20/04 (11)

Re: On the other hand, if you go with a horn loaded 10... - zeekbass 06:37:10 05/04/04 (1)

Thanks. - Bill Fitzmaurice 12:25:15 05/04/04 (0)

Re: On the other hand, if you go with a horn loaded 10... - bwilson 22:35:35 04/20/04 (8)

I don't have that dimensions for that box - Bill Fitzmaurice 05:36:37 04/21/04 (7)

Re: I don't have that dimensions for that box - bwilson 14:21:59 04/21/04 (6)

Re: I don't have that dimensions for that box - Bill Wassilak 15:00:11 04/21/04 (5)

Re: I don't have that dimensions for that box - ctuber 10:02:10 06/24/04 (0)

Sounds like an A7 wannabee - Bill Fitzmaurice 05:16:39 04/22/04 (3)

Re: Sounds like an A7 wannabee - Bill Wassilak 07:32:26 04/22/04 (2)

Re: Sounds like an A7 wannabee - bwilson 18:31:29 04/22/04 (1)

Re: Sounds like an A7 wannabee - Bill Wassilak 07:59:27 04/23/04 (0)

Follow Ups

Sounds like an A7 wannabee - Bill Fitzmaurice 05:16:39 04/22/04 (3)

Re: Sounds like an A7 wannabee - Bill Wassilak 07:32:26 04/22/04 (2)

Re: Sounds like an A7 wannabee - bwilson 18:31:29 04/22/04 (1)

Re: Sounds like an A7 wannabee - Bill Wassilak 07:59:27 04/23/04 (0)

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