I have an Alpine MRV-F450 5/4/3 channel power amplifier. The power listings are in 4 ohm (50x4 RMS plus 200W RMS for the sub). My problem is that I noticed I paid for an Alpine Type R 10" sub and the store gave me an Alpine Type E. I just returned the wrong sub for the right sub and noticed the wiring to the sub is way different.

The type E was simple and you ended up with 4 ohm's if you wired it like a normal speaker. The Type R is a dual 4 Ohm voice coil speaker. It can be wired for 8 Ohm's or 2 Ohm's. Will it hurt my amp if I run my front and rear speakers wired as 4 Ohm and my sub wired as 2 Ohm?????

 

That amp will be fine at 2 ohms no problem.

 

Thanks for the help!!!!! Didn't want to fry a brand new amp!!!!! I knew the amp was stable to 2 Ohms, I just wasn't sure if running 4 Ohm on channels 1-4 (front-rear speakers) and 2 Ohm on channel 5 (subwoofer channel) was going to be ok.

 

Those amps are really either two or three amp boards all in one casing. So, the front channels are pretty much separate from the sub channel, they just share a power source.