Bi-amp vs bridge

1550 Views 3 Replies 3 Participants Last post by capnxtreme, Jul 23, 2009

lowellbarrett

Discussion Starter · Jul 23, 2009

Hey all,

I have a PH30.2 with 6x75rms. I will be running CDT ES-620s up front with the 560 xover (if I go passive). I am on the fence about rear fill and I will be starting with 1 Boston Pro 10" sub (have a second, just want to see what I can do with this one amp first).

So...how do I wire this up?

Option 1 - I could go active with the built in xover on the PH30.2 and send 75x4 to the CDTs, ignore the rear fill, and hit the sub with 150rms.

Option 2 - I could bridge and go passive with the CDTs and end up with 220x3.

Option 3 - I could add some coax to the rear and go 75x4 and 150x1.

Option 4 - Finally, I could add the second BA sub and fit it in with all of the above, but halving the rear channel to stereo at 75x2 to each sub in any case. Doesn't seem like enough, but wanted to cover all angles here for my question.

What kind of advice do you guys have? Good placement for the front stage, baffles built, tweets angled nicely. JVC Kameleon deck.

Thanks for the advice!

Kindly, Paul

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VP Electricity

· #2 · Jul 23, 2009

lowellbarrett said:
Option 1 - I could go active with the built in xover on the PH30.2 and send 75x4 to the CDTs, ignore the rear fill, and hit the sub with 150rms.

Yay. Most tunable (what acative xover?)

lowellbarrett said:
Option 2 - I could bridge and go passive with the CDTs and end up with 220x3.

Yay, I think. CDT would probably suggest this - they have some tech in their xovers that they love, and the CDT xovers are certainly better than the standard passive xover in today's market. (Do CD passives support bi-amping/bi-wiring?)

lowellbarrett said:
Option 3 - I could add some coax to the rear and go 75x4 and 150x1.

Boooo! (Hisssss).

lowellbarrett said:
Option 4 - Finally, I could add the second BA sub and fit it in with all of the above, but halving the rear channel to stereo at 75x2 to each sub in any case. Doesn't seem like enough, but wanted to cover all angles here for my question.

I'd go with your instincts on this one

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lowellbarrett

Discussion Starter · #3 · Jul 23, 2009

The active xover is built in to the PH30.2. It is essential a high pass/low pass setup taken from their highly acclaimed 642ci crossover from back in the day. They have wiring diagrams right on the manual for active systems using the built in xover (manual attached if you are interested).

I did ping CDT to get their opinion. I'll let you know what they say.

Thanks a lot for the reply, looking forward to other opinions in support or other ideas.