6 channel line level 'keyboard mixer'... had oen of these as a kid to replace a similar knob laden 4 channel radioshack mixer in the early to mid 90s. Purchased for like $40 from barracks trading post on street road just north of the philly line (no 1% city sales tax). I remember this being a distinct step up in sound quality from a realistic mixer LOL.... the pots were nice, you had simple high and low shelves that sounded okay and those big 70s VUs were very helpful. I actually used this to make little submixes of live performances onto 2 tracks of a 4 track to avoid having to bounce and degrade quality. So I would get 6 channels of music sounding good to me, maybe ram into a symmetrix or dbx stereo compressor to smooth out the spikes and then tell the live musicians to do a take and hope everything worked. Or I would have midi going which was easier. At that point I had 2 channels for out front stuff with zero tape generation degradation. But you had to commit. This is what it'll be, print it. I think commonly I would have DI bass guitar, a drum machine and then the other channels were wildcards. The independent output volumes per side could a be a blessing or curse. The straight sound is good, but it excels at being overloaded where it ha more of a fuzzy fibe than anything like this form the late 80s or 90s. Not a hard clip sound really. I really wonder what happened to this.

Also, I always thought it was a KM-6B, that's how it looked to me at the time.

This is a very rare and cool looking 6-channel vintage mixer (build in the late 70’s in Japan) with level, treble, bass, effect level, pan and 3-stage input attenuator per channel. In the master section you will find the master and the effect return controls for the left and right channels. Also the monitor output control, the switch for low cut filter on/off and power on/off and, not to forget, these two coll looking backlid VU-meters are there. It is build like a tank as many gear off these old times. The size is 19" x 3,7" x 10,8" and has a weight of aprox. 4,7kg. I used it a lot for summing drum machines, samplers and synths with the benefit to overdrive it, to get the warm characteristics and distortion out of this wonderful piece of gear..."

You really need this if you want to improve the quality of your sound. Originally made for Roland Synths but you can use it with anything.