View Single Post
Old 09-09-2009, 09:58 PM   #19
Big Daddy Big Daddy is offline
Blu-ray Champion
Big Daddy's Avatar
Jan 2008
Southern California

Originally Posted by Driver_King View Post
Recently, I re-ran Audyssey do to some older settings that bottomed out the DIY's driver too fast since the settings were very old and were made when I calibrated the old DIY's subwoofer driver and old amplifier (which has since been replaced with a significantly better driver and amplifier). I found that to get results that are even remotely close to what they used to be, I've had to go through loads of settings and controls to try to get it back to where it was before. Before, I had extreme low end impact (10-30hz range used to be much more audible). Although I have much more headroom and a much more even frequency response, I think that the corner with the much improved settings and modifications will yield even lower frequency response and possibly better frequency response in the corner. I will try this. Will I need to make any settings modifications like phase if I move the sub to the corner?
You will definitely need to adjust each sub separately. If you have an SPL meter, adjust the amp level of each sub first by turning off the other one so that each subwoofer gives you approximately the same level. You don't want one subwoofer to overpower the other one.

Next, you need to adjust the phase of either subwoofer to get the maximum output at your listening pposition.

After that, run Audyssey for multiple positions and tweak a little with an SPL meter.
HT Room: Panasonic PT-AE8000, Epson 1080UB Proj., Mitsubishi 65" Diamond Series HD TV, Yamaha-RX-A3010 Rec., CinePro 6-Ch. Amp. (350 W/Ch, 8 Ohm), Proton D1200 Amp., Behringer EP4000 & EPX3000 Amps., Oppo BDP-83, Sony BDP-S790, Audio Technica Tuntable, Mitsubishi S-VHS, 2 Def. Tech. Super Towers w 15" subs, 1 Def. Tech. Center & 1 Martin-Logan Center, 2 Def. Tech. Surr. & 2 PSB Surr., 2 Cadence Presence, 2 Bose 901 Rears, 2 Modified HSU 12" Subs, 1 ED DIY 12" Sub, 1 ED DIY 15" Sub, Velodyne SMS-1 Subwoofer Equalizer, DirecTV HD, Monster HTS 5000 & APC H15 Power Conditioners.
Two-Channel Room: XiangSheng Tube Preamp., Carver TFM-45 Amp. (375 W/Ch), Behringer EPX4000 Amp., Onkyo CD player, Denon Turntable, Yamaha Tuner, 2 Vintage Polk RTA-15TL Speakers, 2 LCY 100 Super Tweeters, 2 DIY Folded Horn Super Towers with 15" Sub., 1 Modified AA HD-SUB12
Family Room: Mitsubishi 73" Diamond Series TV, Yamaha DSP-A3090 Rec., DirecTV HD-DVR, PS3, Zvox Speaker, 1 DIY 12" Sub.
  Reply With Quote