Originally Posted by hifisponge
Interesting because I have my main channels connected via XLR and the sub via RCA and when I use the internal test tones, the difference in output between these two connection types (XLR is like 6dB louder) is not compensated for in the test tones. So if I level match using the internal test tones, my sub is 6dB too low. I use a test disc now to set levels.
I spent about two hours last night trying figure it out. My findings confirmed what I stated yesterday: Classe internal test tones are not precise. I'll provide detailed figures. I have CA-3200 and CA-2100 connected through balanced cables and my SVS sub through RCA. I activated cable input to get an active signal and lowered all speakers' levels down, as it was too loud and I wanted to start from scratch. I configured speakers' sound levels back to recommended 75 db and ended up with below:
I tried to watch Alien vs. Predator, as this movie is full of effects, surrond action and deep bass. With Classe internal tones movie sounded lifeless. I couldn't stand it, so I whipped out my trusted Audio/Video essentials disk and repeated the whole process again. I ended up with:
If someone can explain that be my guest. It defies logic. Anyway, I put Alien vs. Predator movie on, again. Now I was in business. DTS-MA soundtrack was excellent and it sounded like it should outputted through $8000 high end processor.
To find a workaround these weird settings I just backed all channels down by 10db and ended up with:
I checked the movie again and all dynamics, channel separation and sound quality were preserved. I wouldn't call it an ideal solution, as it requires committed person to go through all of these steps. Luckily, HT/music is my hobby, so I kind of enjoyed the whole process.
My only concern is the issue of channels output mismatch. Is it caused by irregular voltage on the output channels (defective unit) or is it one little variable that I happen to miss out on?
The only other thing I can think of is to try internal channel levels with the active audio source different than cable, which outputted stereo sound at the moment of my configuration (I turned on one of the HBO channels), which was up-mixed to my favorite two-channel sound processing for Cable (Dolby Surrond PLIIx).
I also tried to call Classe and ended up leaving voice message, as nobody was available.