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Eminence X-over for 4Pi [message #42987] Tue, 11 November 2003 07:01 Go to next message
Chris R is currently offline  Chris R
Messages: 133
Registered: May 2009
Master
Hi Wayne,
I've seen you recommend these as an economical way to get
the base X-over, then add the attenuator and HF comp. I'm
all hooked up with spice so I can view the effects of the
attenuator on x-over freq, except that I don't have the
schematics from Eminence to plug into the spice model.
Is that available?
Thx, Chris

Re: Eminence X-over for 4Pi [message #42989 is a reply to message #42987] Tue, 11 November 2003 07:56 Go to previous messageGo to next message
Wayne Parham is currently offline  Wayne Parham
Messages: 18695
Registered: January 2001
Illuminati (33rd Degree)

Components L1, L2, C2, C3 and C4 are on the Eminence crossover PCB, which are sourced by, and which use the same component values as the corresponding π Speakers 500Hz, 800Hz and 1.6kHz crosssovers. The 600Hz and 250Hz/1.6kHz units are also sourced by Eminence, but are special order items, available only through π Speakers.

But for your application - the π 1K6a010dB crossover used in your four π's - It can be made using the Eminence PXB2-1K6 PCB, adding a compensation cable assembly for the tweeter and Zobel damper for the woofer. There are some photos of these addition cable assmblies in the post called "Compensation networks - Photos." And the Spice model for the crossover can be found in the distribution of Spice available here, on the π Speakers website.

Re: Eminence X-over for 4Pi [message #42995 is a reply to message #42989] Tue, 11 November 2003 12:49 Go to previous messageGo to next message
Chris R is currently offline  Chris R
Messages: 133
Registered: May 2009
Master
Thanks for the clue-by-4. One more stupid question. I have a pair
of Kappa 15's. My take on the efficiency graphs is its a 98dB/W
driver. Eminence rates the PSD2002 at 105dB. Does that mean I need
the -8dB x-over, or is the PSD2002 more efficient once mounted
on a horn? I thought I saw 110dB in one of your x-over docs.
thx, Chris

Re: Eminence X-over for 4Pi [message #42996 is a reply to message #42995] Tue, 11 November 2003 13:35 Go to previous message
Wayne Parham is currently offline  Wayne Parham
Messages: 18695
Registered: January 2001
Illuminati (33rd Degree)

I'd use the 10dB attenuator/compensator circuit.

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