If you don't need panning, you might want to consider Intellijel's Mixup - 4 channels in (2mono, 2stereo), 1 stereo out. They are chainable, they have mutes, and they're relatively cheap. And even if you get 2 of them, you end up with only 12hp.
If you don't need panning, you might want to consider Intellijel's Mixup - 4 channels in (2mono, 2stereo), 1 stereo out. They are chainable, they have mutes, and they're relatively cheap. And even if you get 2 of them, you end up with only 12hp.