Jim, if you were still plugged into both the audio outs and just turned off the amp, the result would be, as expected, just a single channel coming out of one side of the keyboard. In order for the keyboard to sum both channels into the mono channel, you must unplug the Right channel plug. What your audience was hearing was just the right channel of the keyboard and no left sounds would be coming out at all if the plug remained in place. It's the way it is wired and the jack switching configuration. Try doing the same comparison again, but instead unplug the Right channel and allow the sounds to come out of the Left/Mono into a single amp.

Good luck, and I'm glad you liked that piano,

Gary

Ok Gary. I'll give it a shot when i set up in a few minutes. So, routing through a mixer first?

No, going through a mixer doesn't work when doing this type of comparison because you still have those plugs plugged into the back of the keyboard. Within the Left/Mono plug and the Right plug, there are leaf switches that direct the signals. Consequently, this prevents you from playing in mono if you merely turn off the amp on one side of the mixer or turn down that channel in the mixer going to one of the keyboard's outputs. When you plug a jack into the Left/Mono and nothing into the right output, the leaf switch connects the outputs together internally to that single output. However, if you plug into just the Right output and nothing into the left, then you would only get the sounds from the right channel and nothing from the left.

Jim, you can always call me on the telephone if you need help with any of this stuff. This time of year, I'm around the house most of the time. I will PM you the telephone number.

Gary

I don't know...tried both ways and when I add the 2nd speaker, oh man. I hear a huge difference, so I'll stick with 2 at this time. Still think the S1s would be the ticket, on one pole, with the extender to house both speakers.

Jim, I would anticipate that you would get a lot fuller, more vibrant sound with two systems in stereo. That's the nature of the beast.

Gary

I've been using stereo since the early 80's. It's what I want to hear.

I agree Don sounds soooooooooooo goood