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<blockquote data-quote="dsw1204" data-source="post: 8336311" data-attributes="member: 663807">I am looking to purchase a new amp for my car.&nbsp; I currently have a very old Alpine 4-channel amp that I would like to replace.&nbsp; I am running some Infinity Kappa&#039;s in the doors with a couple of Eclipse 6X9&#039;s in back.&nbsp; No sub.&nbsp; My Alpine amp is running okay, I just would like a little more power.Can someone tell me the difference between a Class AB amp and a Class D?&nbsp; My understanding is that Class D is more efficient than a Class AB, thus it may be a small (in physical size) amp.&nbsp; But, do I want a smaller sized amp?&nbsp; I am thinking that amps with bigger heat sinks will be less prone to clipping that smaller sized amps.&nbsp; So, is Class D a wise choice?&nbsp; My understanding, also, is that Class D used to be only for powering subs.&nbsp; But, now, you can find them in 4-channel amps.&nbsp; Is this a new development?In my research, I am looking at a Rockford Fosgate R400-4D 400 Watt Full-Range Class-D 4-Channel Amplifier and I am also looking at a DB Drive A6 1200.4 Okur A6 Series 4 x 110-Watt 4-Channel Class AB amplifier.&nbsp; I know Rockford Fosgate but I have never heard of DB Drive.&nbsp; Has anyone heard of DB Drive?&nbsp; Are they in the same league as Rockford Fosgate?Any input on any of these issues would be greatly appreciated.&nbsp; Thanks.</blockquote>

[QUOTE="dsw1204, post: 8336311, member: 663807"] I am looking to purchase a new amp for my car. I currently have a very old Alpine 4-channel amp that I would like to replace. I am running some Infinity Kappa's in the doors with a couple of Eclipse 6X9's in back. No sub. My Alpine amp is running okay, I just would like a little more power. Can someone tell me the difference between a Class AB amp and a Class D? My understanding is that Class D is more efficient than a Class AB, thus it may be a small (in physical size) amp. But, do I want a smaller sized amp? I am thinking that amps with bigger heat sinks will be less prone to clipping that smaller sized amps. So, is Class D a wise choice? My understanding, also, is that Class D used to be only for powering subs. But, now, you can find them in 4-channel amps. Is this a new development? In my research, I am looking at a Rockford Fosgate R400-4D 400 Watt Full-Range Class-D 4-Channel Amplifier and I am also looking at a DB Drive A6 1200.4 Okur A6 Series 4 x 110-Watt 4-Channel Class AB amplifier. I know Rockford Fosgate but I have never heard of DB Drive. Has anyone heard of DB Drive? Are they in the same league as Rockford Fosgate? Any input on any of these issues would be greatly appreciated. Thanks. [/QUOTE]

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