Hi Guys!

Planning out the audio install in the wagon, starting off with a DEH8350SD, 2 x 6.5 inch soundstream 2-ways and then 2 x 6x9 inch soundstream 3-ways connected to the HU.

I will then be chucking in my old subs/sub amp into the mix.

Eventually I'll want to amp the other speakers, but for now I just want to get a fairly decent/working system. Does anyone see any issues running 3 -ohm speakers off a headunit amplifier?

After a quick hunt around, some Internet user reported that pioneer did not recomment it.

Basically, if it did run them, a 3 ohm load will put a 30% more power through the deck, increasing heat through the componentry, this could affect the laser tracking, cd loading, shorten life on amps etc...
It might run them, but for less time. If it starts to go, the speakers wont give you any clue to any problems forming, it will probably just stop one day....

Newer decks with improved amps might be different.. Noting the units that can run a 2 Ohm sub of the rear channels bridged on a pioneer H/Unit... I would probably call customer support, they are pretty helpful, or you could email them, and get something in writing, but until you get information stating other wise, I wouldnt deviate from the specs in the instruction manual, if they were 3 or 2 ohm stable, I'm sure they would tell you as the power ratings would increase, and they could brag about it..

To mimic what Shoot has said I would say the headunit "should" be able to feed more power to a 3 ohm speaker, I personally wouldn't see this as too much of an issue as long as you are not trying to push the volume out of it like crazy (as that's never good for a speaker run of the headunit anyway), however I can make no guarantee so the customer service team will be the best people to help you out in this instance.

Basically your Head unit will be creating the same amount of heat and current draw @ 66% of the volume, which may not be reflected accurately in the volume percentage displayed in the screen...
I reckon what you're trying to do would be risky, especially try to compete with a woofer in the system. I would suggest that you match ohms and have a reliable system, I have no doubt that it will run, even sound good @ 50 %, but for how long???

Thanks guys.

Was trying to save abit of money doing it this way, but if I can't run these speakers off the HU, there's no point buying 4-ohm speakers when I can use that money to buy a 4ch amp to run them anyway :).
They're decent speakers (100wrms).
So in a perfect world, running these speakers at 66% volume would be equivilent to running it at full volume?

not quite. you need to remember speakers real time ohm rating is very dynamic while playing music. i would say its going to be fine but you may run into some heat issues if you listen to music very loud for extended periods of time on extremely hot days. basically under normal conditions you should be fine

Why would you run those speakers off the head unit anyway? Would be a waste seeing as the speakers might be getting 18RMS each IF you are lucky. Seriously under powering them and over powering the head unit