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<blockquote data-quote="dipitydoo" data-source="post: 3024385" data-attributes="member: 567383">What&#039;s the voice coil configuration on the SS sub?&nbsp; Is it a Dual 2 ohm or a single 4 ohm?&nbsp; If its a dual 2 ohm, you can parallel the coils to get a 1 ohm load and get lots of power from many class D mono amps.&nbsp; There is nothing wrong with using a 2 channel amp and bridging it to run a sub.&nbsp; If you are looking at more than 500w, however, you may benefit from the increased efficiency of a class D amp.&nbsp; Class D amps are pretty cheap these days, so I don&#039;t think its going to necessarily cost you much more to get one over a 2 channel amp.For the record, I highly doubt that there are many class A/B amps with higher efficiencies than a class D amp.&nbsp; Some might get close to a class D amp&#039;s efficiency, but typically only at full power.&nbsp; With music, at less than full power, a class A/B amp&#039;s efficiency will drop to about half of full power, while class D amps will almost maintain their efficiency at lower power levels.&nbsp; A typical class A/B amp may be about between 25 - 40 percent efficient with music, while a class D will be between 60 - 90 percent efficient, depending on load.&nbsp; If you were in a spl competition, the advantages may be a little less dramatic.&nbsp; For a daily system, on a higher powered systems on stock electrical systems, the difference can be dramatic between the two amp topologies.</blockquote>

[QUOTE="dipitydoo, post: 3024385, member: 567383"] What's the voice coil configuration on the SS sub? Is it a Dual 2 ohm or a single 4 ohm? If its a dual 2 ohm, you can parallel the coils to get a 1 ohm load and get lots of power from many class D mono amps. There is nothing wrong with using a 2 channel amp and bridging it to run a sub. If you are looking at more than 500w, however, you may benefit from the increased efficiency of a class D amp. Class D amps are pretty cheap these days, so I don't think its going to necessarily cost you much more to get one over a 2 channel amp. For the record, I highly doubt that there are many class A/B amps with higher efficiencies than a class D amp. Some might get close to a class D amp's efficiency, but typically only at full power. With music, at less than full power, a class A/B amp's efficiency will drop to about half of full power, while class D amps will almost maintain their efficiency at lower power levels. A typical class A/B amp may be about between 25 - 40 percent efficient with music, while a class D will be between 60 - 90 percent efficient, depending on load. If you were in a spl competition, the advantages may be a little less dramatic. For a daily system, on a higher powered systems on stock electrical systems, the difference can be dramatic between the two amp topologies. [/QUOTE]

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