Originally Posted by jnick1
Well, I'd like to introduce myself to the Rythmik club as I pulled the trigger on the LV12R earlier this week! It will be here Friday.
With that said, it's been a WHILE since I setup a sub/HT system. I have a Yamaha 675, which means YPAO. How do I go about calibrating the sub? I was reading that I need to play with the Sub Gain to get YPAO to get the sub the closest to 0dB? Then twek the levels inside the receiver?
I do have an SPL meter and typically, I tone out all the speakers to read 80dB on the SPL, with the center running a little hot, around 82-83 for better dialogue and the sub running at 84-85 for more bass. Is this still the way to do it? However, please note that I NEVER used room calibration software. I always just used the SPL meter.
Thanks and I can't wait for it to get here!
Not too familiar with Yamaha's room correction system, but my understanding is that YPAO doesn't equalize the bass frequencies and only the top end Adventege series does some limited PEQ (fixed 3 points).
You would run what's on the 675 to determine the crossover frequency. Also the distances and levels for each speaker, including the Rythmik sub.
I would recommend getting a MiniDSP (2x4) here: http://www.minidsp.com/products/mini...ox/minidsp-2x4
which will allow you to PEQ up to 6 frequencies. The wiring connection is:
Yamaha 675 LFE output ---> MiniDSP ---> sub LFE input
Then get a calibrated USB microphone from Cross Spectrum Labs: http://cross-spectrum.com/measuremen...ated_umik.html
Download the free software called REW: http://www.roomeqwizard.com/#downloads
There is a how to guide (from AVS member Jerry Austin) for doing room measurements on this thread: Simplified REW Setup and Use (USB Mic & HDMI Connection) Including Measurement Techniques and How To Interpret Graphs
You would look for the best placement for the Rythmik sub and Main Listening Position first. Do a sub crawl. Instructions and video is here: http://www.audioholics.com/home-thea...ofer-placement
The next step is to carry out the low frequency measurement (15Hz to 300Hz) using the guide, REW and USB calibrated mic. When you start to use REW, verify your sub crawl method got it right.
There is a room correction module in REW called Room EQ. Use it to make the bi-quad filters and export out to the MiniDSP.
Last step is re-measure with REW to check the response is what you want. Tinker with different sub distances (adjustable on the 975) to get the smoothest crossover.