bridging ?

[firebirdsmoker]

my 4 channel amp can be bridged with a simple switch. thus turning the 4 small channel terminals into 2 big ones. my problem is the low frequency passover and bass boost only work on the rear output setting. now when i bridge the amp to run my 2 subs, can i wire both subs to the rear output only so they both get the low-pass option? will that make the amp run harder? any help would be appreachiated. my amp is a Pyramid Super Blue Series 1000 watt x 4 channel PB449X and the subs are Kenwood 12's 750 watts (175 RMS) if that info helps with replies

[car audio dave]

when you bridge the front and rear they should both become low pass.

[JAFO2RHh]

what impedence are your subs?
I'm not sure what dave meant but just bridging the amp will not automatically set the amp to a lowpass x-over setting, so if your front channel doesn't have a lowpass x-over then you'll want to use the rear channel only.

[firebirdsmoker]

my subs are 4 ohms each but can be a total of 2 if wired in parallel. if my amp only has cross-over on the rear can i just wire my subs in parallel on the rear only and still have them pound? will i have amp or sub problems?

[JAFO2RHh]

With a pyramid amp wiring the subs in parallel to 2ohms will most likely give you problems.

[car audio dave]

disregard my first comment.

that amp is designed for use as a 4 channel or 3 channel amp, meaning run speakers off the front and a 4 ohm sub off the rear. jaf is correct about the pyramid amps not taking well to 4 ohms.

[firebirdsmoker]

so can i run one sub off the rear and one off the front? i wanna run both of my subs and i dont wanna go buy another amp. but if i have too i will but i really wanna make this one work. any suggestions how would be great

[car audio dave]

no, dont run a sub off the front. as you saids, theres no low pass filter for the front. youll blow your sub. you need to give one way or another, either loose a sub or get a new amp.

[Bass101]

You can purchase a separate crossover and skip the internal crossover all together. Then bridge the amp...

[firebirdsmoker]

what are the complications if any if i do run both subs off one channel? i.e. the reaer?

[JAFO2RHh]

If you parallel the speakers you're gonna burn up that amp.

[firebirdsmoker]

wont it run better though if it runs the subs together off a 2ohm load? i kno the 2-channels are designed for 4 ohm loads but wouldnt a 2 ohm load work as well? what about a series setup somehow? where can i buy an external crossover for the front channel so i can use both channels?