Same problem after FW flash. I am using FW rev 3.11, which is the same rev as I had installed before, and the latest released by Outlaw.

I'll continue discussions with Steve tomorrow.

Thanks!

The family has gone to bed and I'm taking a few minutes to (quietly, alas) blow off some steam from a long day, but I'll try to replicate this with an analog source in the next day or so.

I know it's not this simple, but, originally you said you you were using your PC with an optical connection. Later you said you set your PC to output analog signals. You did change cables (from the PC to the 990) and changed the 990 to the correct input, right? Probably way off bass (base, heh) but just throwing it out there.

Yep, but thanks for checking. I have the PC hooked up with both analog and optical at all times. I did go into the setup for PC and set it to use "analog" input -- after that, it said "analog" on the front panel of the 990, and I could hear some hum from my long cable run.

As I recall, I've got a stereo analog connection from my 981HD to my 990's CD input (connected when I was beta testing the 981HD ). I'll toss some test tones on a CD and use that connection to do some testing either tonight or tomorrow morning and let you know what I find.

Is “Tone Defeat” turned off? I know that when that is turned off it does some goofy things.

Checked that, but the "Tone" features aren't available in bypass mode, which is what I would expect. Nonetheless, I set it both "on" and "off" in a non-bypass-mode setting, and then returned to bypass mode. No change. In all cases, bass and treble were at 0.

OK, I've got a test CD made here with 10 second test tones at 45Hz, 75Hz, and 200Hz as well as some frequency sweeps taken from the RealTraps Test CD. I'll use this disc and the stereo analog output of my 981HD to see if I can reproduce the behavior that Otto is seeing.

Thanks, gonk. We'll see what happens with yours.

Here's a link to some frequency sweeps I did this morning, FWIW.

http://www.hometheatershack.com/forums/r....html#post32923

I did some testing to see if I could duplicate what you were getting and the answer is yes. I tried both digital and analog signals with a test CD. Using the SPL meter I could hear and see that when changing the Fronts to Small resulted in a lower SPL reading with both digital and analog when in Bypass mode. For this test my sub was disconnected. I tried several frequencies and the difference between small and large was significant with some frequencies such as 40hz. I wouldn’t have needed a SPL meter to tell there was a difference.