View Full Version : 2 ohm or 4 ohm on a Pioneer DEH-P690

11-24-2007, 12:45 PM
I have a Pioneer DEH-P690UB. I want to run a set of Infinity speakers that are rated 2 ohm. These can take a lot more power than I have. I don't crank it up that much just looking to upgrade speakers. Any issues or ideas?

11-24-2007, 12:48 PM
I would do that only if you want a blown headunit. You can't run a pioneer cd player at two ohms. The only way you could do it is to have 2 pairs of those infinities and wire them in series to bring them back to 4 ohms.

11-24-2007, 01:09 PM
its doable but not recommendable....some ppl have it working at two ohms..but the HU overheats as it needs modifications on the cooling system...too much hastle for my liking

Gary S
11-24-2007, 01:21 PM
If the manufacturer does not list a 2-ohm power rating for the head unit, it was probably not designed for it and you run a high risk of blowing the internal amps.

No problem... just get a sub and a 4-channel amp and do a bi-amped system... front amp channels on the comps, rear channels on the sub... biggest bang for the buck in sound quality you can get, it's well worth it.

11-26-2007, 02:31 PM
forgive me if this is a terribly dumb question.. but as long as your using an amp for your speakers, it shouldnt make a difference as long as your amp is rated for ohms correct?

Gary S
11-26-2007, 02:34 PM
As long as the amp is rated for 2-OHMs, that's correct.