Originally Posted by Mfusick
Dude with those efficient high SPL speakers 0db is extremely loud. I watch around -20 on my Denon AVR3312IC and my speakers are not as loud as yours
On a calibrated system efficiency should have nothing to do with it...that's loudness levels anyway, at a given spot on the dial, in this case, "0". They should simply be using less power to produce the same/comparable output. Now, if you're driving an amplifier into clipping because you're using particularly inefficient speakers that's something different, altogether.
But as I've said many times before, there are MANY people who do not need pro speakers or thousands of watts to reach reference level...at least in the LCR/surrounds...the subsonic area is a bit different animal when you talk about meeting the ref spec.
If you're in a ~400 sq ft room and ~12 feet away from the LCR with relatively efficient loudspeakers (say 92dbs 1w 1m) you're going to be hitting 105db peaks at 12' with just ~200 watts of peak input, which many mid-higher end AVRs can provide...again, for peaks. 85dbs at 12 feet? Coasting, with 3-4 watts of input. This is crystallized by THX certified AVRs- which, in and of themselves are not necessarily better
than comparable units- but at least guaranteed to meet the ref spec in a given room size with moderately efficient loudspeakers.
You start entering the realm of even more efficient speakers, say 95+dbs and those power requirements drop through the floor.
But, seeing most people don't listen anywhere near these levels, most avrs are sailing along with much less stress than most imagine, so the idea that people NEED external amplifiers becomes even more moot. Great then, more cash for movies!
JamesEdited by mastermaybe - 7/10/13 at 9:22am