Car Stereos: Installing a Sub and Amp, pioneer unit, polk speakers


Question
I have a 03 Silverado currently STOCK, but I just replaced all 4 of the speakers to some new POLK Speakers, in the db series.  I mostly tune in to ROCK and some POP and a little of other types of Music. Very little Rap.

I also plan to replace my Radio, thinking of something like a new Pioneer Unit with a 7" screen, but not 100%.   Here are some of the questions I have.  Would 1 10" Sub be more then good enough, or should I go with 2 10" subs?  I was looking at the POLK 5 Channel Amp to handle the 4 speakers and the 2 Subs.  The Subs I was looking at were also POLK db's, at 4 ohm, yet I was told to wire them as 1 ohm from Crutchfield with that Sub, However you would do that?!?!  Maybe it would be better with 2 4 channel Subs, one for the 4 speakers and the second Bridged to power the 2 10" subs?

I'm hoping I also have to room the mount the Amps Behind the back seat.  I'm I'm going overkill?  I don't need people to hear me a block away.  I also don't want to shake my truck Apart while it sounds like Garbage, like Many people's SUB systems seem to.

My brother had 1 Infinity Sub and a 5 channel Kicker Sub in his truck and he said it was quite loud and sounded great.  He no longer has the truck, but still has the Amp and Sub and I could buy that from him.  Even though I don't install these type of things, wiring won't be a issue, it's just Specifics on Sub's and Amps Capabilities and sound quality I just don't know anything about.

Answer
Hi Joe,

Personally, I think a single 10" subwoofer works fine to provide bass in a typical truck, but that really reflects my own preference--I like a balanced bass response that doesn't overpower the rest of the speakers.  Many people like a lot more bass than I do.

The Polk 5-channel amplifier is a very versatile choice, which means that it should work well with a wide variety of subwoofer systems.  The subwoofer output will work with 4-ohm, 2-ohm or 1-ohm speaker systems.  It would be easy enough to start with a single subwoofer, and add another if you decide you want more bass; the amplifier will handle either one sub or two subs easily.

The Polk dB series gives you an option of single voice coil (SVC) or dual voice coil (DVC) subs.  The performance will be pretty similar between the two types, but your selection will determine the final impedance load on the amplifier (and therefore the power output).  The 5-channel amp is rated to produce 280 watts with a 4-ohm load and 600 watts with a 1-ohm load.  (The company doesn't list a 2-ohm rating, at least not on the web site; but I'd guess it would be around 500 watts).  The power produced by the amplifier's subwoofer channel will be divided between both subs, if you decide to use a pair.  The 10" dB is rated for 270 watts of continuous power.

So, if you wanted the maximum potential bass output, then you'd probably want to buy two of the 4-ohm DVC subs, and wire them to the amplifier as a 1-ohm load.   However, if you want to try a single sub (at least at first) then you'll want the 4-ohm SVC subwoofer.  Depending on the type of enclosure you use, I'd suspect this would give you all the bass you want; but if you decide you want more, then you can buy a second SVC sub and wire it in parallel with the first to produce a 2-ohm load at the amp.  This would give you two 10" subs with approximately 500 watts of power to drive them; the results shouldn't be too much different from the 1-ohm "max bass" option.

I don't think you'll have much trouble mounting the amplifier behind the rear seat.  The challenge will come from finding a subwoofer enclosure that fits your available space.

Hope this helps!

Brian