AMT Electronics SH-100-4R

Awesome amp from AMT.  It's a 4-channel amp with fully independent channel controls and EQ.  It is 100 watts with power scaling to 20 and 2 watts.  MIDI and relay switchable.  Just about any feature you could want and so portable.

It is in excellent condition.  I don't think there are any marks on it.

I have the original box.  Along with the basic manual I have a hand drawn block diagram they sent me.

Check the link to the review by Rod McG of Guitar Interactive.

AMT Electronics SH-100-4R

4 channel 100 watt high gain amp in a 1U rack chassis
4 independent channels each with its own tone shaping
MIDI controllable
Switchable series/parallel effects loop with mix control
Preamp out/power amp in loop
2/20/100 watt power selection
EL34/6L6 switchable tube tone
Balanced direct out with ground lift, level control and switchable speaker emulation
Relay switching for channel selection, effects loop and A/B master volume selection
Dual switchable master volumes
Presence and resonance power amp controls
High/low input sensitivity switch

Channel 1 - Clean
Tone shift switch
Controls: Gain, Bass, Middle, Treble, Voicing, Level

Channel 2 - Crunch
Low/high switch
Controls: Gain, Bass, Middle, Treble, Level

Channel 3 - Lead 1
Low/high switch
Controls: Gain, Bass, Middle, Treble, Voicing, Level

Channel 4 - Lead 2
Dry/fat switch
Controls: Gain, Bass, Middle, Treble, Level

Online comments on what the different SH-100 channels sound like...

Does JTM / JMP all day on channel 2, dual rec on the channel 3, channel 4 is more like a 5150. put a klon or a SHO in front of channel 2 and it would probably nail all that hot rodded Marshall stuff.

Channel 1: Clean - Fender?/???
Channel 2: Marshall JTM/JMP
Channel 3: Mesa Dual Rectifier (So also SLO since the rectifier preamp circuit was based on the Soldano?)
Channel 4: Peavey 5150 (EVH)