Originally Posted by endeavour32 (Post 3030324)

gotta run those puppys in stereo.

Originally Posted by getrdunn (Post 3030310)

so with a DV 12" woofer running under 80 hz is it even necessary to run the two 8" as mid base from 80 hz up to 180 - 200 hz? Or would it just be recommended to run them say 125 hz and down with a mono amp? Hope this makes sense.

I guess what I am wondering is what would sound the best provided you have the six to eitht 6.5" for the highs.

Originally Posted by jonyb (Post 3030374)

Instead of spending money on 2 8's, building boxes (they're worthless without enclosures), an amp, and wiring, use that money on more power for the coax's and subs.

The amp you use depends on what woofer it is. Dual 2 ohm? Dual 4 ohm? Dual 8 ohm? Just 1 speaker?

I don't know what you've been told, but mono class D amps are for woofers. Yes, another amp on the coax's. Don't try to use a 2-channel to power a sub and coax's, or even a 4-channel amp if you want it to sound like anything.

Sub amp: sub
4-channel amp: coax's.



BUT, something to keep in mind is that if you use the XS-650's, you'll need an amp that's stable enough to do that. Each 650 is 3.6 - 3.7 ohm, so when you wire 2 in parrallel, it drops the impedance below 2 ohm on each channel and most amps aren't stable with that kind of load. The Syn4 will do it, but not many other amps will. I don't know if the JL's will or not.

Originally Posted by getrdunn (Post 3030390)

I am running a mono sub amp for the 12" w6.

The 8"w3's will be in sealed boxes and on their own amp.

The high will also have their own 4 channel amp. Will power accordingly. The syn4 looks like the ticket especially since the 650's are actually less 4 ohm.

What would be a good amp to run the two 8" sealed?

Again, with running the two 8" along with the 12", what would be more beneficial - to run them as subs up to say 125 or 150hz with a sub amp. OR run them as mids and run the from say around 80 hz up to say 180 hz?

Regardless they will be sealed just wondering what way they would benefit the system.

Originally Posted by phragle (Post 3030403)

not a boat, bu in a old ranger i had, I used 1=12" 80 hz down 500 watts and two 8s, 250 watts apiece 60-200 hz or so, dont remember the settings but I used an MTX active crossover with hz, slope and freq boost. bass was insane.popped the back window out once and my hearing is permanently damaged. all sealed enclosures built to spec on the speakers. The enclosures and a good active crossover network will make a huge difference.