"Sorry to disappoint you (and myself) but this is my true experience. Maybe some of you can help me fine tune my setup to get it to its optimal performing range. It's certainly not a plug and play unit, as it looks. A lot depends on the input signal - something I've never worried about before."
You didn't disappoint anyone, and I hope I can get you headed in the right direction.
A lot does depend upon the input signal, and it must be set properly to obtain the best results. While I do not possess a G-70, I believe some of the constraints are the same with all keyboards.
Set the G-70 master volume to the 1:00 O'Clock position. This should remain constant at all times. If you find there is a need to raise or lower the volume, use the L1 Compact's Master Volume--not the keyboard's master volume. If you raised the keyboard's volume after setting everything up this would tend to overdrive the L1, which could cause distortion.
Set the G-70s global EQs in the traditional smile configuration, taking care not to go below the flat line with the mid-range EQs. In my case, my keyboard has a 5-band EQ system, which has an individual channel range of =/- 10 db, plus frequency adjustments for each channel. If the G-70 has something similar, try setting them at 5,4,3,4,8, which for me was a good starting point. Naturally, these settings will vary with individual venues.
Next, set up the L1 compact, making sure that you are in a relatively large room and both extensions are in place.
I'm not familiar with the G-70 audio output, but I assume it has both mono and stereo outs. Most users have found that the best sound quality is achieved by using a 1/4-inch adapter plug that combines both the left and right channels, which can be purchased at Radio Shack.
If you are not using a Tonematch Mixer, be sure to set the input switch to the Line position. It makes a huge difference.
The L1s master volume should be set at approximately the 10 to 11 O'Clock position. If you see any indication of clipping, red or yellow signal, the input volume is probably too high and should be reduced.
In my case, I position the L1 compact a couple feet to the right of my sitting position, and approximately a foot behind me. This allows me to hear exactly the same volume the audience is hearing. Keep in mind that this is not a conventional sound system--if it sounds loud to you, it sounds loud to them.
I created a couple midi files on my PSR-3000 using onboard styles. These are used to determine which set of EQs I use on the keyboard for that particular venue. The Yamaha allows me to save as many EQ configurations as I want in individual files, and I can only assume the G-70 would allow you to do the same. I labeled the EQ files with the names of the venues, just to make things easier.
If you have any questions, I'll be more than happy to help in any way I can, including over the telephone, which is sometimes the easiest way.
One last thing. If for any reason you cannot get the sound out of the L1 Compact that you like, keep in mind that you can return it to the dealer within 45 days and get a full refund. I only know two people that actually did this, but both said there was no problem with the returns.
Keep us posted,
[This message has been edited by travlin'easy (edited 08-22-2009).]