I have an old Tascam four-track cassette deck which is also (primarily, for me) a most useful mixer. Four 1/4" jack inputs at the front, mic/line, effects send (mono) and stereo return, level adjusters, tone controls, pan, and stuff. Oh, did I mention, it can also record, bounce tracks, mix-down, overdub, monitor off-tape and record at the same time, etc. It runs off 12V DC. One of the best £4 I have ever spent.