There are some jobs I play that are so small I will use a Roland KC350 amp/speaker. The Bose would be great for any job...but some of these 1-hr jobs are so small (and "budget conscious") it is just easier to plug in the KB and amp and leave all the other gear in the van.
For most jobs however, I run my keyboard, mic, MP3 player or laptop , my female singer's mic (when she is with me) into a mixer. The L/R output of the mixer goes into Channels 1 & 2 of the L1.
If the venue requests a mic for announcements, I will set one up and run it into channel 3 or 4. I don't use commercial CD's, but channels 3 & 4 are just fine for CD's because commercial CD's have already been tweaked in studio.
So, for channels 1 & 2, I, most often, use presets 12, 55 and 57 depending on the venue's acoustics...but DonM & Gary have me considering going flat 00 and adjusting any FX within the keyboard.
For the mics, I add needed reverb or other FX at the mixer. And the mixer has a "Talk" button, which was eliminated on the PSR 3K. THAT comes in real handy.
There are umpteen ways to do just about anything. I like to experiment, hear what other guys are doing, try it and then settle in on what seems to be most comfortable.
As for tips and info on how best to use the Bose L1, the site Gary posted and the user forum are a wealth of information.
Eddie
[This message has been edited by btweengigs (edited 11-21-2008).]