2. amps-preamps
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Speaker Effeciency and Bass Production

How much speaker efficiency is gained if the bottom two octaves or so don't need to be produced? I'm considering trying an SET or OTL amp but am wondering about the ability of these amp types to drive my speakers (Opera Quinta; 89db efficiency and 6 ohm nominal impedance; 6-8 ohms from 100Hz up). I am using a pair of corner placed subwoofers which can easily produce the lower 2-3 octaves. So the question is if the amps driving the main speakers don't have to produce anything below 100Hz or so, then is the ability to use them on my main speakers more doable? The room is fairly large, but I sit only around 10 feet from them.
smeyers

Showing 1 response by myrtle

myrtle
30 posts
 
Impossible to answer that one definitively but if it helps, I use a 10w amp to drive 90dB speakers in a large room, sitting 10 feet away and I have never heard my amps clip. I don't listen at ear splitting levels but cranking it up my ears run out of head room before the amps do.

No doubt that removing bass below 100Hz will help your amps, but a 5 to 8W amp may surprise you with those speakers, even without the subs.
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