After Later Audio Bartender V2 4 Channel Expandable Stereo Mixer guitar-cabinets with conversion quality on a

with conversion quality on a par with a regular audio interface (see here or here)

Item Number: 13524

and even an oil can unit

Model: Z-Rails 84HP Black

After Later Audio Bartender V2 4 Channel Expandable Stereo Mixer guitar-cabinets with conversion quality on aThe centerpiece of the mixer system. Four stereo channels, with two stereo aux send and two stereo returns. Each channel can be used in a mono mode where both channels are mixed. If you want to do eight channels of mono, you can put the channels in stereo mode, and then use the pan control to control the crossfade between each channel, and then take the mono output. There is a built in cueing system so you can monitor channels in your headphones and