I will quite often use only one L1 with BB, laptop, keyboard on a gig.

I use a standard audio cord designed to take an earphone stereo output to two RCA L and R phono plugs. They are plugged into the L1's RCA inputs that are designed primarily for CD playback. This sums to mono through resistors inside the L1 and works just fine.

BE SURE TO TURN THE SOFTWARE PLAYBACK FADER FOR YOUR LAPTOP AUDIO ALL THE WAY UP WHEN DOING THIS. ADJUST VOLUME AT THE L1'S CONTROL. DRIVING THE LINE HARD LIKE THIS IS A MUST IN ORDER TO GET GOOD AUDIO.

Band in a Box sounds good.


--Mac