No flaming, this is for someone I know, not me. I already have my own stuff figured out. But how do you hook up a 4 channel legacy 1600 watt amp to power a system with two 6.5s, two 6 x 9s and three 10 inch subs. I realize this amp may be junk but I can't help what he bought, I'm just trying to help him hook it all up. I haven't seen the amp but it says it has an adjustable crossover network. Does that mean the crossover can be adjusted to high pass for the 4 speakers and low pass for the subs? What would be the best way to run the subs, like in series or parallel. Thanks.

 

you need at least a 5 channel amp to do a set up with 4 speakers and 3 subs

 

So it can't be hooked up like with 1 channel running one set of speakers, 1 channel running another set of speakers and the other two bridged into the subs. Or does it need to be 1 channel per speaker and then another amp to run the subs? Sorry I'm so dumb at this!

 

why dont u run ur rear off your hu
your two front and sub off the amp wouldnt that work?

 

So the HU will put out enough power to run the rear speakers and will be able to keep up with the sound coming from the fronts? If this is true that would be great. Is there anything special that you have to do to run the rears off the HU or do you just run the it right off the regular speaker outputs on the HU.

 

Should be enough for rear fill....

You can run the 6.5's and 6x9's off two channels by running them in series. As far as the 3 10's, I would suggest running only two.

 

So I could run the 6.5s in series on one channel, the 6 x 9s in series on another channel, and then one sub per each of the other channels? How about if I hooked up the 3 subs in series or in parallel and bridge the two remaining channels for them?

 

I assume the 6.5's will be in the front and the 6x9's in the back? If so, you could run the left 6.5 and left 6x9 in series on one channel and the same for the right. Of course, if the amp is 2ohm stable, you could run them in parallel if they are 4ohm speakers (which is probably the case since you state you can bridge the amp).

If you run the 3 10's and try to set them up in a series/parallel configuration, I believe the 10" sub that is run in parallel will receive more power than the 2 subs in series since there is less resistance on that sub.

 

Why doesn't your friend just buy a separate amp for the subs? That one amp will be doing A LOT of work powering 3 subs and the other speakers.

 

I'm sure if another amp would be required that would not be a problem. We're just trying to figure out what would be the best setup for all of this. Neither of us know a whole lot about this so we are just trying to find out what people think is the best setup. If it will all run off the one amp that's great but another amp would be fine too.

 

what is the impedance of the subs? i doubt this amp has enough power to power 4 speakers and 3 subs anyway. isn't the rms on that amp like around 200w? also keep in mind that if you bridge channels on an amp your min ohm load drops so you would probably have a 4ohm min on each brided channel. i'll give it some more thought, but the only thought right now is get a separate amp for the subs, since even if you did get it all working, those subs would probably be getting no more than 35Wrms each which would hardly produce enough sound to hear.

also, could you post what speakers and subs and even the model of the amp if possible? maybe we could be of more help that way.

 

Looks like the general consensus is to just get another amp specifically for the subs. I'll pass these posts on to my cousin and see what he says. Thanks for all the advice. I'll probably be back with some questions about whether to wire the subs in series or in parallel and stuff like that. Thanks.

 

Have him pick up an amp just for the subs. Would make things much simpler and will most likely extend the life of the Legacy amp by not trying to run 7 speakers.