Amp/sub question from a first timer.

[Keyten]

I'll try and keep this short and sweet. This is my first time to deal with car audio and I'm trying to research on what I'll need before I buy everything.

I purchased 2 subs, 2x Blaupunkt THW1000 that have a 200w RMS @ 4 ohms.

Next I am looking at getting 2x Alpine SPR-69C 6x9s for my rear deck that operate at 100w RMS @ 4 ohms.

Now for the amp, I was wanting to get a 4 channel to power them all. A Boss Audio MR250.4 Marine was what I had in mind. It can run 100w RMS x4 @ 4 ohms.

This would power my rear speakers nicely but only have my subs running at 100w RMS of their full 200w RMS.

I have never installed a car audio system before or worked on one at all. My question is, is that underpowering the subs too much? Would they still have a decent kick to them without having their own amp? Down the road I plan on buying a 2nd one but atm I don't want to fork out the cash for 2 amps.

Any input would be appreciated.

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[sdaman05 10+ year member]

the subs would be under powered yes but you dont even need to power the 6 by 9's unless you are going to amplify the front sets of speakers. it would sound weird like all ur music is from behind you... personally i would just get a good sub amp that will add in low level sound and leave the 6by9 with no amp and then wait till you get enough money to get a 4 channel amp.

OHH ALSO if you are planning on running another amp in the future but your not sure when ALWAYS run larger power wire to the first amp so when you want to add a second one the wire is already big enough for both. i run 4 gauge to a cap then to 2 amps and it works fine.

aka leave the 6by9's alone just get a sub amp

 

[Keyten]

Thing is though, I only have a factory HU. I drive a Mazda RX8 and there are no fit kits for it or anything so I'm stuck with the stock HU. I dont have the exact specs on the HU but would the 6x9s still sound fine from a stock HU un-amped?