Originally Posted by Archaea
So for 122dB which is 17dB over reference you need 2k wattage?
We were that high (+17dB) at the dlbeck g2g and we only had the cherry monoblocks on each speaker and I didn't hear a hint of distortion, and if you look at the comments - neither did anyone else. Well, if you consider what we were doing while attempting to listen at that level actually listening. Most of us had earplugs in and our hand clamped as firmly as possible over our ears and earplugs and it was still absolutely absurdly loud. So loud you couln't make out what someone was saying when they were yelling at you from a couple feet away. So I call shens on those numbers out of real world experience --- on the demo session you personally MC'ed.
...Not only that - but that calc doesn't take into account crossover frequency -- which (since most people use 80hz or 120hz) would make the power draw much less for mainspeaker use.
Here's a more realistic picture for actual reference level use of the 212HT, as traditionally defined to be 85dB levels with 20dB peaks - resulting in 105dB peaks for mainspeakers. So for reference level listening (0dB on the AVR) at 3M you need a max of 23 watts.
And I don't know about you guys, but I normally listen to my music at about -20 or -15dB at most for anything but the shortest of demo sessions.
At -15 dB music listening you are using less than 1 watt on the 212HT.
DD's, trying to chum up the water again.
maybe distortion made the earplugs necessary.
Must be hard to hear peak distortion with earplugs in? Was the room highly treated? I definitely notice more absorption rooms sound quieter at equal spl to live rooms.
Pre-Pro: Emotiva XMC-1, DSP: Mini DSP 2x4 balanced
Amplifier: Sunfire TGA7400, Lab Gruppen FP10000Q
Speakers: JTR Noesis 212HT (LCR), JTR Slant 8's (surrounds), 3 Orbit Shifter LFU's
Sources: PS3, HTPC, Dish Network
Projector: Epson 8350
Screen: Seymour XD AT 138" diagonal 16:9