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Car Audio Help
Wiring, Electrical & Installation
Installing 4 channel/wires
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<blockquote data-quote="keep_hope_alive" data-source="post: 8117126" data-attributes="member: 576029"><p>so a shop used a LOC to feed a sub amp? they likely just tapped the front wires.</p><p></p><p>what 4 channel amp? some amps have high level inputs that negate the need for an external LOC.</p><p></p><p>some amps have RCA outputs to allow for daisy-chaining amps.</p><p></p><p>some 4 channel amps let you run all four channels off just 2 channel inputs, some require all 4.</p><p></p><p>you want to retain fader, so you will want to intercept front speaker wiring. this is easiest if you buy two wire harnesses behind the head unit (into car and into radio). simply run 4 sets of wires from the 4 channel amp to the head unit. two pairs are amp outputs to power the front speakers using stock wiring. the other two pairs connect to the hu outputs to feed the LOC or high level inputs.</p><p></p><p>does the car have the premium system with external stock amplifier? if so, you will want to bypass it.</p><p></p><p>it would be easier to upgrade the HU and better overall.</p></blockquote><p></p>
[QUOTE="keep_hope_alive, post: 8117126, member: 576029"] so a shop used a LOC to feed a sub amp? they likely just tapped the front wires. what 4 channel amp? some amps have high level inputs that negate the need for an external LOC. some amps have RCA outputs to allow for daisy-chaining amps. some 4 channel amps let you run all four channels off just 2 channel inputs, some require all 4. you want to retain fader, so you will want to intercept front speaker wiring. this is easiest if you buy two wire harnesses behind the head unit (into car and into radio). simply run 4 sets of wires from the 4 channel amp to the head unit. two pairs are amp outputs to power the front speakers using stock wiring. the other two pairs connect to the hu outputs to feed the LOC or high level inputs. does the car have the premium system with external stock amplifier? if so, you will want to bypass it. it would be easier to upgrade the HU and better overall. [/QUOTE]
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