# Car amplifier wiring question **URL:** \ **Category:** NYSpeed Off Topic\ **Created:** [November 20, 2009, 7:08am UTC](https://forums.speedlife.net/t/car-amplifier-wiring-question/76360 "2009-11-20T07:08:08Z")\ **Posts on this page:** 11\ **Page:** 1
**Author:** ![1slowMini](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/1slowmini/32/5102_2.png) [@1slowMini](https://forums.speedlife.net/u/1slowMini)\ **Post date:** [November 20, 2009, 7:08am UTC](https://forums.speedlife.net/t/car-amplifier-wiring-question/76360/1 "2009-11-20T07:08:08Z")
I’m helping my friend put 4 speaker cans and speakers across his tower on his wakeboard boat and had a question about wiring. Right now the tower is wired for 2 speakers and I really do not want to run 2 more lengths of speaker wire through the tower. I was planning on just running the 2nd two speakers parallel off the 1st two. My question is how can i run the amp (4 channel) at 2 ohm to maximize the power output and still run the speakers parallel. Is this possible? I’m a newb at this so I’m guessing its an easy answer. Thanks for any help! ---
**Author:** ![97FormulaWS-6](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/97formulaws-6/32/7384_2.png) [@97FormulaWS-6](https://forums.speedlife.net/u/97FormulaWS-6)\ **Post date:** [November 20, 2009, 7:18am UTC](https://forums.speedlife.net/t/car-amplifier-wiring-question/76360/2 "2009-11-20T07:18:58Z")
Bridge the amplifier to 2 channels, and run the speakers in SERIES, not parallel. This will put a 8 ohm load on the combined channels/4 ohm load on each channel. ---
**Author:** ![1slowMini](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/1slowmini/32/5102_2.png) [@1slowMini](https://forums.speedlife.net/u/1slowMini)\ **Post date:** [November 20, 2009, 7:28am UTC](https://forums.speedlife.net/t/car-amplifier-wiring-question/76360/3 "2009-11-20T07:28:35Z")
This will run the amp at 2 ohms? ---
**Author:** ![97FormulaWS-6](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/97formulaws-6/32/7384_2.png) [@97FormulaWS-6](https://forums.speedlife.net/u/97FormulaWS-6)\ **Post date:** [November 20, 2009, 7:34am UTC](https://forums.speedlife.net/t/car-amplifier-wiring-question/76360/4 "2009-11-20T07:34:34Z")
The amp is a 4 channel amp; and the speakers are 4 ohm speakers, correct? If so; if you bridge the amp to 2 channels, and wire the speakers in parallel you will present the amp with a 2 ohm load; Most 4 channel amplifiers will not work with a 2 ohm load when bridged to 2 channels. You could run it this way, but most likely you will blow up the amplifier. If you wire the speakers in series you present the amp with an 8 ohm load; which ANY 4channel amp that is bridged to 2 channels will accept. ---
**Author:** ![1slowMini](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/1slowmini/32/5102_2.png) [@1slowMini](https://forums.speedlife.net/u/1slowMini)\ **Post date:** [November 20, 2009, 7:42am UTC](https://forums.speedlife.net/t/car-amplifier-wiring-question/76360/5 "2009-11-20T07:42:22Z")
There actually 3 ohm which is weird here are the speakers [http://signature.crutchfield.com/App/Product/Item/Default.aspx?i=107MM651&search=polk+mm651&ssi=0&skipvs=T](http://signature.crutchfield.com/App/Product/Item/Default.aspx?i=107MM651&search=polk+mm651&ssi=0&skipvs=T) ---
**Author:** ![97FormulaWS-6](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/97formulaws-6/32/7384_2.png) [@97FormulaWS-6](https://forums.speedlife.net/u/97FormulaWS-6)\ **Post date:** [November 20, 2009, 7:44am UTC](https://forums.speedlife.net/t/car-amplifier-wiring-question/76360/6 "2009-11-20T07:44:59Z")
> [@1slowMini](#): > > There actually 3 ohm which is weird here are the speakers > > [http://signature.crutchfield.com/App/Product/Item/Default.aspx?i=107MM651&search=polk+mm651&ssi=0&skipvs=T](http://signature.crutchfield.com/App/Product/Item/Default.aspx?i=107MM651&search=polk+mm651&ssi=0&skipvs=T) That makes it even worse if you run them in parallel and bridge the amp… then you’re only presenting a ~1.4 ohm load… that amp would fail pretty quickly. Wire the speakers in series, and bridge the amp to 2 channels and it’ll work just fine. ---
**Author:** ![1slowMini](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/1slowmini/32/5102_2.png) [@1slowMini](https://forums.speedlife.net/u/1slowMini)\ **Post date:** [November 20, 2009, 7:46am UTC](https://forums.speedlife.net/t/car-amplifier-wiring-question/76360/7 "2009-11-20T07:46:53Z")
Thanks for the help, would there be any advantage to wiring 4 separate channels? ---
**Author:** ![97FormulaWS-6](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/97formulaws-6/32/7384_2.png) [@97FormulaWS-6](https://forums.speedlife.net/u/97FormulaWS-6)\ **Post date:** [November 20, 2009, 7:50am UTC](https://forums.speedlife.net/t/car-amplifier-wiring-question/76360/8 "2009-11-20T07:50:10Z")
> [@1slowMini](#): > > Thanks for the help, would there be any advantage to wiring 4 separate channels? Not in this case. ---
**Author:** ![1slowMini](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/1slowmini/32/5102_2.png) [@1slowMini](https://forums.speedlife.net/u/1slowMini)\ **Post date:** [November 20, 2009, 7:54am UTC](https://forums.speedlife.net/t/car-amplifier-wiring-question/76360/9 "2009-11-20T07:54:12Z")
do you think 60 watts to each speaker will be enough power? sorry for all the questions ---
**Author:** ![97FormulaWS-6](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/97formulaws-6/32/7384_2.png) [@97FormulaWS-6](https://forums.speedlife.net/u/97FormulaWS-6)\ **Post date:** [November 20, 2009, 7:58am UTC](https://forums.speedlife.net/t/car-amplifier-wiring-question/76360/10 "2009-11-20T07:58:58Z")
60 Watts rms? Should work fine. ---
**Author:** ![1slowMini](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/1slowmini/32/5102_2.png) [@1slowMini](https://forums.speedlife.net/u/1slowMini)\ **Post date:** [November 20, 2009, 8:01am UTC](https://forums.speedlife.net/t/car-amplifier-wiring-question/76360/11 "2009-11-20T08:01:20Z")
yes rms at 4ohms