Originally Posted by lemonslush
I though I saw a post of their max SPL but cant seem to find it now. DO we think the 708 would be loud enough to put behind a screen as your main LRC?
I was looking at the JBL cinema stuff and love the 305's I have. If I could get my HT speakers to play as loud as I needed and sound like my 305 I would be pleased at punch. Also the 708 looks to be front ported, Hello baffle wall!
708 is plenty loud for a 12 foot distance.
Distance is the determining factor as each doubling of distance is a drop by about -6db. I think many are rated at 1 meter/1watt for sensitivity.
So if you know every time you double wattage you gain about 3db - you can back into how many watts it will take to reach the volume level you want.
Commercial theaters are calibrated at 85db C weighted and often called on to do 100db+ peaks. Having 20db of headroom seems like something you want.
Frequency Response -1.5 dB @ 45Hz – 23kHz
Max SPL (80 Hz - 20 kHz) >108 dB SPL / 1m
Maximum Peak SPL (80 Hz - 20 kHz) >114 dB SPL / 1m
Specs look pretty good. ^
If it does 114db peak at 1m, then it does 111db at 2m, and 108db at 3m.
3.65m is 12 feet. So 85db constant with about 105db peaks seems to be reasonable with these at a 12ft distance.
I think you'd be surprised at how loud this actually is. Set your system C weighted at 85db constant with some pink noise (subs off !). Check it out. (Turn subs back on).