Help Speaker Settings

EFW

I HAVE AN ONKYO TX-SR703 AVR PUSHING MY POLKS. (2) MONITOR 70'S (1) CS2 CENTER (2) MONITOR 40'S AND A PSW12. MY QUESTION IS WHAT CROSSOVER FREQUENCIES SHOULD I USE FOR EACH? (FULL BAND, 40HZ, 60HZ, 70HZ, 80HZ(THX), 90HZ, 100HZ, 120HZ, 150HZ, 200HZ) RIGHT NOW I HAVE IT ON 80HZ(THX) FOR ALL AND I DON'T THINK THE SPEAKERS ARE PRODUCING THE SOUND THEY ARE CAPEABLE OF. MY AVR ALLOWS ME TO SET FREQUENCIES FOR:
A. FRONT
B. CENTER
C. SURROUND
D. SURROUND BACK
E. LPF OF LFE
ANY HELP WOULD BE MUCH APPRECIATED. THANKS...........EFW POLK ROOKIE

Jim Shearer

EFW wrote:

I HAVE AN ONKYO TX-SR703 AVR PUSHING MY POLKS. (2) MONITOR 70'S (1) CS2 CENTER (2) MONITOR 40'S AND A PSW12. MY QUESTION IS WHAT CROSSOVER FREQUENCIES SHOULD I USE FOR EACH? (FULL BAND, 40HZ, 60HZ, 70HZ, 80HZ(THX), 90HZ, 100HZ, 120HZ, 150HZ, 200HZ) RIGHT NOW I HAVE IT ON 80HZ(THX) FOR ALL AND I DON'T THINK THE SPEAKERS ARE PRODUCING THE SOUND THEY ARE CAPEABLE OF. MY AVR ALLOWS ME TO SET FREQUENCIES FOR:
A. FRONT
B. CENTER
C. SURROUND
D. SURROUND BACK
E. LPF OF LFE
ANY HELP WOULD BE MUCH APPRECIATED. THANKS...........EFW POLK ROOKIE

Since you haven't heard from anyone else, I'll comment, even though I'm a 2 channel kinda guy.

Your AVR is rated at 100 wpc. If you want the most from your Mon 70's, you'll need more power. That said, I think by setting the cross-over at 80 Hz probably takes enough power demand off the bottom end that you can manage at 100 wpc, assuming you don't want crazy loud levels. The Mon 70's should be good down to about 40 Hz, but off-loading the lows onto the sub is not a bad thing, as it reduces the power requirement from the AVR. The lower you set the cross-over point, the more power you need from the AVR. But setting it higher than 80 Hz is also not great, as the sub is not so well suited for a higher range, and you will begin to get into the freq. range where sounds can be localized--i.e. you hear where it's coming from, which defeats the purpose of a multi channel system.

You can try changing the settings, but be careful you don't drive the AVR into clipping, as you are likely to fry the tweeters in that case. Most folks under-estimate the amount of power they need. More drivers are wrecked by having too small an amp than by having a really big amp.

Cheers, Jim