speakers efficiency

Just how efficient is a rating of 87 db?

lolo05-08-2006 5:25pm

elevick Details Discussions Posts This discussion Message User 2,636 posts 05-08-2006 at 06:23pm Copy Comment URL Report Comment Edit Delete 1 watt @ 1 meter = 87db 2 watts = 90db 4 watt = 93db 8 watts = 96db 16 watts = 99 db and so on..... Every increase of 10db will give a perceived doubling in volume. THX = 110db Ultra THX = 112 db With that said, 87 is not very efficient but not too bad either. You won't want to run these with a small tube amp but an average 100 watt amp should do fine as long as you don't want rock concert levels.
elevick Details Discussions Posts This discussion Message User 2,636 posts 05-09-2006 at 05:44pm Copy Comment URL Report Comment Edit Delete THX = to be THX certified, equipment must meet certain standards such as sustained volume at 110db. Ultra THX is even harder with 112db. Many amps/speakers can't handle these loads. If your audio gear can produce 112db continuous, it means that you can play very loud, distortion free music. My best amps aren't THX certified even though they can blow away the criteria (keep that in mind). 120 watt tube monoblocks into 94 db speakers.