The Black Lion Audio PM8mkII summing mixer features 8 channels of transformer-coupled inputs and three separate master outputs.
All transormerless output, It has mute, volume and pan capability on each channel, plus a DB25 connection to link multiple PM8mkII's for "infinite" channels of summing. Huge 3/4 watt buss resistors provide isolation between channels while minimizing the thermal noise typically found in a small format console buss. Grain oriented silicon steel input and output transformers lend a rich coloration to the sound by adding just a touch of low-order distortion below 250hz. It's like having a vintage console in your studio, but at a fraction of the price. It's exactly what you need to give your mixes that fat body you've been looking for.
The mkII revision of the PM8 has all new internals with noise floor improvements, an upgraded power supply, output gain up to +18dB, separate monitor outputs via a DB25 connection that mirrors all three pairs of main outputs, monitor level control, balanced passive outputs, and a new link setup that accommodates multiple units for "infinite" channels of summing.