Does the Outlaw Audio 990 Have A Mono Mode (for testing speakers, etc)?

I am recapping my various Klipsch Heritage speakers: Klipschorns, LaScalas, Heresy Is and IIs.

As part of testing things out and A-B'ing the HIs and HIIs, etc, it was suggested that rather than running in stereo mode, as Lt and Rt signals are often a bit different, use a mono signal output to each speaker that one is testing. In this way only room factors should influence any potential difference in sound. However, I can't find any mono sound field (just stereo, bypass, PL II, etc.).

So, is there a mono (even if you have to use keycode, like finding the software version)?

If not, and if you don't have a reasonable mono source, like an old record (which is pain for this purpose), what do people recc?
I have been using stereo/bypass/upsample so far.

Thanx

There is not a "mono" mode. Are you trying to deliver the exact same signal to both left and right channels? You could try creating an audio file on the computer (downmix a stereo source to mono and copy it to both channels) and then either burning a CD or using a media player to play the track in stereo mode (which will not apply any matrix processing). You could also connect the left (or right) channel output of a source to a splitter and feed both left and right inputs with it.

Are you trying to deliver the exact same signal to both left and right channels?

yes

no idea as to how to do the stereo to mono downmix.

i think the y splitter idea might work.

Gonk--

I was able to use the DTD video type download on the 990.
I did not use a SPL meter yet, but some sounds seemed much louder or softer than others. Is it supposed to be that way? Where should I look for test tones that should send out the same SPL for each frquency as measured on a Radio Shack analog SPL? How do you adjust your system to "even things out", beyond the SMS-1 that I ordered (which I think is only good for bass)?

990 Pre/pro, MC240 tune amp or OA 750 SS amp, Klipshorns, LaScalas, Academy center, and Heresy speakers.

And as always--thanx )