Okay, so I'm lookin' to add a sub to my system for cheapo. I know, not the smartest thing but hey, I'm on a budget. I have an Alpine HU, I've replaced the door speakers, and have an amp. All from a year or so back. I'd rather not spend 250 bucks on a Bazooka w/ Amp, and want to add a sub. I figure, the AMP I have will do bridged mode on two chann. So what I'm asking is, how would I go about wiring 4-door speakers, and a sub to one 4-chann amp? I thought about chan 1/2 being speakers (front/back respectively) and 3/4 being sub. My only problem is what sub to get, and will me speakers be okay running them like that. I don't wanna have crappy sound, or no power. any help would be appriciated.

Oh the Amp is a US Acoustics 65x4. And the door speakers are infinity reference series. And this is for an 02 Tundra.

Also, are there any opinions on what an ok sub would be for this undertaking? Thanks a million for your help!

--Adam

 

wire your front and rear speakers in parallel to channels 1 and 2 Left =1 right =2

If you need to dim down the rear speakers, use some L pads in line with them, set and forget. (look it up on yahoo)



Bridge the output of channels 3 and 4 to a 4ohm load of subwoofer(s) probably around 170 watts to the sub(s) in real life. Normally I wouldnt recommend using 1/2 of a 4 channel amp to drive subs, and other have driving the rest, if you have a critical ear. A dedicated sub amp seems to do better (doesnt share a single power supply like a 4 channel)

http://www.usacoustics.com/2004/usb4065%20specs.htm
this confirms 160 bridged mono, I was close anyway


Youre not going to win any contests but it should be better than stock.

 

If your alpine HU has power, run the rear speakers off the HU

 

if you are dead set against getting a new amp then yes parallel your left side speakers off of the left channel and do the same to the other side. This frees up channels 3 and 4 to put into the sub bridged....

this is of course assuming that your amp is 2ohm stereo stable....

 

according to the link I posted, it claims to be 2ohm stable