Advice needed on compatibility of AMP & SUB

Hey guys,
I am looking at doing a sub install in my car. I am not doing it in a traditional manner however...
I will be using a "free air subwoofer"

I will be building a fake floor in the boot that will raise about 10cm above stock, this will allow for two things for me to carry a full size 5th alloy and that is also the space that the sub will be sitting in (with the alloy rotated, pic attached). Then it will be a 18mm or 22mm mdf sheet on hinges that will open and the sub will be attached to that.

Everything will be sound deadened with green recycled carpet underlay.

I plan on using this Sub and this amp will these be fine? (I'm not sure if that amp will be able to fully power the sub and have enough left over for two rear speakers?)

If i understand correctly i will be able to bridge two channels on the amp so that i get 300W at 4 Ohms? (which is what i think the sub needs)

And that would leave me with 2 spare channels so that i can power the rears when i upgrade them, leaving the fronts amped from the head unit.

Also would 8 gauge power wire would be enough for this sort of configuration?

I have had some experience in fitting a sub & amp package, but that was bought as a kit and i didn't have to worry about compatibility.

Can someone please check these two products over and let me know if they are suitable?

I am already running a Pioneer SPH-DA120 headunit with stock audi speakers.

Thanks

Sayam said:

Yes you can bridge that amp and yes it will run that sub

Amp front speakers not rear otherwise you'll ruin staging

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Cheers for that!

Front speakers are amped by HU rears will be with amp.

I will replace the speakers for some better ones as the stock audi ones arent up to the job... I just dont know what speakers to go for..

Also will 8 gauge power wire be enough?

Thanks

Sayam said:

8 gauge will be enough for carrying the kind of power that amp will produce. you could just use 4 gauge and use a 5m run so that you're future proofed interms of length and power handling

if you amp the rear they will be louder than the front and will mess up the sound stage in the car. sound should come from in front of you not from behind

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4 gauge will be harder to hide, as in my car you need to run from the battery, across engine bay to drivers footwell, in the interior and then to the boot so i think that would be more than 5 meters anyway?

Ahh i see what you mean....

although i can adjust the levels from the amp and through the head unit.

Could you recommend any speakers that would be a suitable replacement?

SUB, AMP & Wires ordered.. Boot build comences this/ next weekend.
Will update with Pics