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Re: Cab & xover considerations [message #38811 is a reply to message #38810]

Thu, 24 October 2002 12:03

DRC
Messages: 169
Registered: May 2009

Master

Wayne,

Thanks! So how does 36.5"Hx17"Wx14"D sound? I'll skip the stands.

I imagine I'd use your 800hz@12db/oct xover, (correct me if there's a better choice), but I've no idea what the values would be for this box & woofer. The joys of going "off road". ;-)
Keep your ears and your mind open.

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You've got mail! [message #38812 is a reply to message #38811]

Thu, 24 October 2002 14:08

Wayne Parham
Messages: 18683
Registered: January 2001

Illuminati (33rd Degree)

A 36.5" x 17" x 14" cabinet is perfect for a TAD 1602. Use a rectangular port that's 3.1" x 5.5" and 4.4" long, and your cabinet will work very well.

Check your E-Mail - I've sent you the crossover schematics. Use a Zobel woofer damper of 8 ohms and 20uF across the woofer with this crossover.

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Re: Driver Escalation [message #38818 is a reply to message #38800]

Fri, 25 October 2002 07:01

DRC
Messages: 169
Registered: May 2009

Master

If I were to go three way (sssomebody ssstop me!!!!) with the 2131's, would the same cabinet still work for both the 1602's and the 2131's, or should they be wholly or partially (perforated shelf going sideways between them?) separated or . . . ?

Given the operating range of the three drivers, I'm thinking of crossing the 1602 to the 2123 gently at 200hz, then more steeply to the tweeter (PSD2002 to start) at 1600. That would give the JBL 3 critical octaves to cover.

(Still pinata-bashing, free-wheeling without much of a clue!)

Thanks!
Keep your ears and your mind open.

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Trouble, trouble [message #38824 is a reply to message #38818]

Fri, 25 October 2002 11:14

JLapaire
Messages: 156
Registered: May 2009

Master

Hi Dave, you know I almost hate to do this, but I just want to throw in a reminder that the Eminence goes Verrry nicely up to 1.6k, as attested by a bunch of Bottleheads under thine own roof. And it's so cheap and simple and 100+ db....all right, I won't bring it up again.
BTW I'm not bringing so much beer this time, Mike and I wound up drinking most of it at the last meet and I went home without my speakers that I'd finally talked my wife into letting into the living room.

John

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Re: Driver Escalation [message #38827 is a reply to message #38818]

Fri, 25 October 2002 11:41

Wayne Parham
Messages: 18683
Registered: January 2001

Illuminati (33rd Degree)

The three-way's I've designed using similar components crossed at 250Hz and 1.6kHz. And the 2123 is contained in its own separate motor cabinet that is sealed and isolated from the woofer's ported motor cabinet. It's a small box within the larger cabinet.

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Re: Trouble, trouble [message #38829 is a reply to message #38824]

Fri, 25 October 2002 12:08

DRC
Messages: 169
Registered: May 2009

Master

Well, I'd a helped you with the beer, but I was losing the remote to the CD transport every 5 minutes without any! Somebody else run the 11/3 meet, I think I need some beer!

Yeah, I know, but that was just too easy. I've gotta complicate the hell out of it to make it really fun!
Keep your ears and your mind open.

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Re: Driver Escalation [message #38831 is a reply to message #38827]

Fri, 25 October 2002 12:48

DRC
Messages: 169
Registered: May 2009

Master

Hi Wayne!

Did you stay with passive xovers in a three way, and if so, was the 300 at a different slope from the 1.6k ?
Keep your ears and your mind open.

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Three-way systems [message #38833 is a reply to message #38831]

Fri, 25 October 2002 14:01

Wayne Parham
Messages: 18683
Registered: January 2001

Illuminati (33rd Degree)

The crossover can be configured for first or second order LF and MF sections and a third-order HF which is then used with π compensation for the compression horn tweeter. Crossover points are 250Hz and 1.6kHz and it's perfect for use in three-way π cornerhorns. In this implementation, the crossover is configured for first-order LF and MF slopes.

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Any progress on the active cross-over mentioned a while back? nt [message #38835 is a reply to message #38833]

Fri, 25 October 2002 14:34

Garland
Messages: 269
Registered: May 2009

Grand Master

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Re: Any progress on the active cross-over mentioned a while back? [message #38841 is a reply to message #38835]

Fri, 25 October 2002 15:55

Wayne Parham
Messages: 18683
Registered: January 2001

Illuminati (33rd Degree)

No, and the worst part is that tomorrow I'm going to visit with Kevin Grier, and he's planning on using the active crossover, so I promised to look it over with him. The second worst part is that it is actually very simple, and I just need to run the numbers and build a suitable model to verify its performance. I've had the papers on my desk for a month or two, so that they prompt me into action every time I see them. But I've still not had time to make it a priority.

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