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<blockquote data-quote="hispls" data-source="post: 8815338" data-attributes="member: 614752">For best results you should buy a head unit with multiple pre-amp outs.&nbsp; I&#039;d be highly suspect of anything so cheap that it does not have this and it&#039;ll make the job of tuning things on the fly much simpler.Separate power runs from the battery to each amp is optimum but assuming this is low-ish power distro blocks are acceptable.&nbsp; It is advised to ground each amplifier/accessory to a solid clean piece of the car frame/body with as short of a wire as possible.IMO rear speakers are pretty worthless, I&#039;d advise leave those out entirely and invest the money you were going to spend on those into a higher end set for your fronts.Finally there&#039;s rarely a need to run multiple subwoofers until you have more power than one can handle.&nbsp;&nbsp; Use fewer woofers of larger size/quality if possible for best results.&nbsp; Also modern full range class D amplifiers (when run within their limits) will sound indistinguishable from class A/B, there is almost no good reason to buy class A/B over class D these days.</blockquote>

[QUOTE="hispls, post: 8815338, member: 614752"] For best results you should buy a head unit with multiple pre-amp outs. I'd be highly suspect of anything so cheap that it does not have this and it'll make the job of tuning things on the fly much simpler. Separate power runs from the battery to each amp is optimum but assuming this is low-ish power distro blocks are acceptable. It is advised to ground each amplifier/accessory to a solid clean piece of the car frame/body with as short of a wire as possible. IMO rear speakers are pretty worthless, I'd advise leave those out entirely and invest the money you were going to spend on those into a higher end set for your fronts. Finally there's rarely a need to run multiple subwoofers until you have more power than one can handle. Use fewer woofers of larger size/quality if possible for best results. Also modern full range class D amplifiers (when run within their limits) will sound indistinguishable from class A/B, there is almost no good reason to buy class A/B over class D these days. [/QUOTE]

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