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<blockquote data-quote="squeak9798" data-source="post: 3350801" data-attributes="member: 555320">Not all are class A up to 15w.&nbsp; Most cut out of class A operation well before that.The previously mentioned high-baised class A/B amps may give you 15-25w in class A operation......but those aren&#039;t &quot;most&quot; class A/B&#039;s.Though this spec has sort of went by the wayside (and could be overstated by wise manufacturers even if it is given)....the easy way to tell class A operation is to look at the idle current spec.<a href="http://www.carsound.com/artman2/publish/spkrsandsubs/JL_Audio_E6450_268.shtml" target="_blank">http://www.carsound.com/artman2/publish/spkrsandsubs/JL_Audio_E6450_268.shtml</a>(first one I could find with an idle current measurement listed)Idle current draw of 1.9AUnder IDEAL conditions, 14.4V supply voltage and 25% efficiency (maximum for class A operation), it would generate 6.84w in class A operation.&nbsp; Being a 6 channel amplifier, that equates to about 1w per channel before switching out of class A operation........That type of idle current draw/power output is more representative of the masses of class A/B&#039;s than the high biased 15w+ variety.......</blockquote>

[QUOTE="squeak9798, post: 3350801, member: 555320"] Not all are class A up to 15w. Most cut out of class A operation [I]well[/I] before that. The previously mentioned high-baised class A/B amps may give you 15-25w in class A operation......but those aren't "most" class A/B's. Though this spec has sort of went by the wayside (and could be overstated by wise manufacturers even if it is given)....the easy way to tell class A operation is to look at the idle current spec. [URL="http://www.carsound.com/artman2/publish/spkrsandsubs/JL_Audio_E6450_268.shtml"]http://www.carsound.com/artman2/publish/spkrsandsubs/JL_Audio_E6450_268.shtml[/URL] (first one I could find with an idle current measurement listed) Idle current draw of 1.9A Under [I]IDEAL[/I] conditions, 14.4V supply voltage and 25% efficiency (maximum for class A operation), it would generate 6.84w in class A operation. Being a 6 channel amplifier, that equates to about 1w per channel before switching out of class A operation........ That type of idle current draw/power output is more representative of the masses of class A/B's than the high biased 15w+ variety....... [/QUOTE]

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