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2A3 SET powers ESS AMT-4s!

Posted by adaug (A) on January 23, 2013 at 16:43:28

today i was playing my ess amt-4s with a push/pull 5881 amp that is rated at about 20wpc. just for snicks, i decided to hook up my james burgess 2A3 set amp just to see what they would sound like on the amt-4s, not expecting much.

i left the volume control on the preamp where it was with the 5881 amp. i expected the volume to be a lot lower with the 2A3 amp. wrong! the volume was actually louder with the 2A3 on the same preamp volume setting.

i am bewildered. common wisdom is that a 2A3 set amp will have a power rating of a couple of wpc while the push/pull 5881 should be at about 20 wpc.

the amt-4s are a 2-way with the heil tweeter and 10" jbl woofers. official efficiency ratings for them are hard to find, but they are considered only moderaely efficient. yet a 2-watt SET had no problem driving them to loud volume.

any insights?

thanks


-andre d

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