Looking for system advice

Hello everyone.  Just want to start out by saying I just joined the group and it's really awesome.

this is my question:  I have a 1990 honda crx hatchback with an upper end panasonic head unit (2 preamp outs) 40x4 watt and front 5.5" and rear 6.25" nicer alpine speakers that came with the vehicle.  A few months ago I went to a reputable car audio place in my area and (without doing any research) was sold a Fosgate 301s 2 channel amp(300 rms at 2 ohm) and a pair of punch RFZ3810 10" subs (8 ohm, 150 rms) in a sealed box that pretty much takes up my entire hatch area.  They installed it for me. 

My soundstage is poor to say the least, No front audio is heard, and sound quality is poor.  The sub faces backward about 16" from the rear of the car.

question 1.  I have a pioneer gm-h50 amp (uninstalled) (25Wx2 at 4 ohms) I was thinking of using for the front speakers.  Good idea?  should I scrap the rear speakers and just use the subs for rear bass?  Should I try to run the rear speakers off of the fosgate amp with the subs?

question 2:  when I hook up the pioneer amp I was planning on using a power distrubution block...good idea?

Thank you all for your support.

would that just be incompetance on the salesmans part to sell me 8 ohm subs with the amp?  Would I even have a case if I asked to exchange or return them?

they were purchased on 2/22...just over 2 months ago.

geez....the guy was the assistant manager.

Alright.....I got screwed I guess.  Partly my fault for not checking things out and takeing the salepersons word...but where does that leave me?  How should I approach them?  The manner that I confront them will establish the outcome.  If I put them on the defensive right away they will probably tell me to go to hell, but if I'm too nice they won't do a damn thing about it. THEY were the ones that picked out the amp and the subs and installed them both.......no conversation of ohms ever took place.  I don't have the boxes for the subs any longer. 

Anyone with ideas on how to handle this please give me some advice. 

DjRDifacs and luxuryrules, thank you for takeing the time to reply to my post.  I'm pretty sure I'm stuck with the 2 channel amp, so I'll make due and follow luxury's advice.  Where could I put 2 more speakers in a crx......hmmm?

thx again guys.

Marc

Actually, I just did some research on your new hardware... how do you know your subs are 8 Ohms?  Several websites say those subs are 4 Ohms... in which case you're alright with that amp.
Other speakers in a crx... good question.  I recently bought an HU and got a pair of free speakers with it.  With nothing better to do, I just hooked them up to my amp and put them under my seats.  I'm not familiar with the interior of a CRX, so I can't give you any better advice, but under the seats probably won't work too bad.
Check the specs on your subs and get back to me.  If they turn out to be 8 Ohms, then we'll talk about what to do.

If you bridge the amp's 2 channels  into one, you'd need to give it a load of 4 ohms, and the only way to do this with 2 single voice coil subs is to get ones that have 8-ohm voice coils, and then just wire both subs in parallel.  The salesperson was probably trying to save you a little money actually, since other ways of wiring up the subs would mean you'd have to get dual voice coil subs or get an amp that is 1 or 2 ohm bridged stable.  Both of those alternatives would undoubtedly be much more expensive to you.

Your amp is 2 ohm stereo & 4 ohm mono stable.  2 ohm stereo basically means you can hook up two 4-ohm speakers in parallel to each channel, so that doesn't really apply to your situation.

If they sold him two 4-ohm subs, he could not run them in parallel as that would present a single 2 ohm load to the amp, and the minimum impedence for a bridged load for his amp is 4 ohms.  So with two 4-ohm subs he could wire them both together in series, and then run them off of a single 8 ohm bridged output.  Or he could wire them up one per channel--so each channel would see 4 ohms and you wouldn't fully utilize all the power of the amp.  Neither of these methods will enable him to use all of his amp's available power, however, and that's why he was sold the 8 ohm subs.

Two 8-ohm subs wired in parallel will present a single 4 ohm load to an amplifier.  This single bridged load will maximize the power output of the amp, without danger of overheating it.

Here's a diagram of how you should have the subs hooked up

https://www.rockfordfosgate.com/rftech/wiringwizard/index.asp?WoofQty=2+woofers&WoofImp=Single+Voice+Coil+-+8+ohms&image.x=11&image.y=9

Mark, thanks for clarifying that.  So by bridging the amp to make it stable at 4 Ohms, then running the subs in parallel to put a 4 Ohm load on the amp then you have the best setup.  Esmith, are you saying that he was sold those subs with the intention of them being wired like that?

Probably yes, because 8-ohm subs are typically used just for that particular purpose.  True they can also be utilized in tri or quad enclosures, but usually the point of getting two 8-ohm subs is just to run a single 4 ohm mono bridged load to your 2-channel amp.

you are absolutely right esmith..I spoke with them today and that is exactly what they did.  Thank's to everyone who participated in this for me....I learned something.

Marc