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Car Audio Discussion
General Car Audio
1 amp: bridge 4-channel into 2+1sub VS. 2 amps: 2-channel +1mono
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<blockquote data-quote="zako" data-source="post: 7932144" data-attributes="member: 629735"><p>A high output 4 channel amplifier should work fine as long as the subwoofer can be wired for 4 ohm load. A single 4-channel amplifier should not stress car's electrical system. When you bridge channels, they do see a lower impedance. If you connect a 4ohm subwoofer to bridged channels, they will see 2ohm impedance. This in theory could cause the amplifier to run less efficiently, perhaps slightly hotter., but the drop in efficiency from 80ish to 70ish % should not be a cause of concern with a single 4-channel amplifier. If you drive your speakers hard, I personally would recommend to buy a higher output Class D amplifier, such as PPI Phantom P900.4, Polk Class D, Alpine PDX, etc. There should be no heat/efficiency issues with those.</p></blockquote><p></p>
[QUOTE="zako, post: 7932144, member: 629735"] A high output 4 channel amplifier should work fine as long as the subwoofer can be wired for 4 ohm load. A single 4-channel amplifier should not stress car's electrical system. When you bridge channels, they do see a lower impedance. If you connect a 4ohm subwoofer to bridged channels, they will see 2ohm impedance. This in theory could cause the amplifier to run less efficiently, perhaps slightly hotter., but the drop in efficiency from 80ish to 70ish % should not be a cause of concern with a single 4-channel amplifier. If you drive your speakers hard, I personally would recommend to buy a higher output Class D amplifier, such as PPI Phantom P900.4, Polk Class D, Alpine PDX, etc. There should be no heat/efficiency issues with those. [/QUOTE]
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1 amp: bridge 4-channel into 2+1sub VS. 2 amps: 2-channel +1mono
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