The RH750 is the best amp TC Electronics has ever created. If I had anything critical to say about this amp it would be the stock knobs are crap. They were made cheaply and break easily. I replaced them with some knobs that are much more sturdy. This amp has a gain control, master volume, 4 band EQ with shift button for the mids, Spectracomp (tweeter tone), and TubeTone (tube emulation control). It also has an on-board tuner and 3 memory slots to store your favorite mixes which you can recall by pressing a button. Sometimes it’s difficult to see your onstage amp settings, but not with the RH750 as it has red LEDs that show your levels even in dark stage settings. Rear panel has the usual, output combination SpeakOn and 1/4”, direct out (pre & post), earphones out and MIDI connection for optional the RC4 foot switch. The optional foot switch gives you access to the tuner (LED read-out built-in) and 3 individual switches for your memory presets. The amps are selling on eBay and Reverb for between $500 and $850, plus tax and shipping. Most don’t include the foot switch, midi cable and padded bag. Mine includes: RH 750 Amp New RC4 Foot Switch New MIDI Cable Power Cable New Padded Gator Carry Bag