I recently released a matrix mixer; not as small as some of the others you mention, I'm afraid, though it does have built in passive mults on all ports which should help save some routing space, or splitters at least.
happy-hardware.com
-- happy-hardware

Hi @happy-hardware...

I like the mults, especially on the inputs!

had aquick read through of the description, but couldn't see hp or power requirements - but I might just be blind!!!

also are the trimmers full height ones - so compatible with the thonk trimmer toppers?

Jim

"some of the best base-level info to remember can be found in Jim's sigfile" @Lugia

Utility modules are the dull polish that makes the shiny modules actually shine!!!

sound sources < sound modifiers < modulation sources < utilities