Amplifier and Cap connection

Hi everyone. I'm just going to come straight out and say it. I know nothing about cars or their electrical systems. Well a little bit. I know computers that's my thing. Anyways, I have a question for all of you that are way more knowledgable than me. I have an aftermarket head unit, pioneer deh-p8500mp. Here it is: https://www.pioneerelectronics.com/pna/product/detail/0,,2076_4039_38309,00.html
I have recently purchased an alpine mrd-m605 and an alpine type R sub. I had a guy from best buy (that's where i work and where I bought them) install it in my car and I asked him to put in a dual amp kit. Here are where my questions begin.

1. WHen the sub pounds, it sounds great inside the car, but when you open the trunk and stand there and listen to it, it makes a sound like too much power is going there. Like it's overloading or something. The best buy guy say it was fine, but I just wanna make sure with all of you guys.

2.   A little bit later, I purchased a capacitor as well as another alpine MRD-M605 amp and another alpine type r sub. However, the guy from bby told me he measured it out for a mrd-f345 which is a four channel amp to power the speakers. So I decided not to get that amp, and now I don't work at bby anymore. And i need to figure out how to by myself, using the dual amp kit in there already to install a capacitor and another amp and sub.


Thank you very much everyone in advance.

your going to need help. your going to have to run new power wire from the battery. piggy back your remote wire.run RCA's  from one amp to the other. put the Cap about 6"to12"s for the amps make sure that your grounds are about 3' from each other . be sure to charge the cap before you put full power to it. also be sure to wire the new sub the same as the other. and a common mistake for first time installs is running the RCA's on the same side as the power wire be dure to run them on opposite side of the car.

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1974 ford pinto 4 15" punch Z power punch bd 1001 pioneer DEH-6700

Well basically, there's a dual amp kit. One side of the kit is hooked up to an mrd-m605 alpine amp. and a 10" type r. On the other side of the amp kit, the guy said he measured out the voltages so that it would fit a 4 channel mrv-f345 alpine amp. What I want to do is add another mrd-m605 and another 10" woofer to the free side of the amp kit. And about the overloading thing, when i open the trunk and listen to it, it sounds like you know when a factory speaker is getting too much bass signal from an aftermarket head unit and it can't handle it so it makes kind of like a farting sound? that's what it sounds like.


Thanks a lot guys.

just use the other side of the amp kit . piggy back your remote from one anp to the other. and for the cap wire it into the power before the distrubution block. and for the RCA's if there is a line out from your other amp use that . if you dont have that as an option you will have to run another set of RCA's. also make sure that your gains are set the same and properly . your subs must be wired the same as well. BTW whats your location. your in over your head a bit with this. maybe some one on this forum is close enough for you to go to there shop or just go to there garage.

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1974 ford pinto 4 15" punch Z power punch bd 1001 pioneer DEH-6700

I agree.  You can probably figure out how to wire it but it's tricky enough that tuning it is really past your abilities & there are too many variables to really map it out here for you.  Bottom line is that it won't sound great if you do it (if it works at all) & you're risking killing the equipment.

you need some help buddy find somebody one the form that is close and have them help you. as everybody said above.

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Want to know some good equipment- JL,Adire Audio,Mcintosh,Brax,Helix,Eclipse,JBL,RE,Dimoand Audio,Zapco, pritty much anything DYhon,Forbidden recommend
On the12volt you give some info and you get in

That would be awesome if someone could help me. I live in Wheeling illinois, it's a northwest chicago suburb. If there's someone in Chicago, I go to school at DePaul so i'm there all the time too. Thanks guys you're really helpful.