AMT Electronics StoneHead SH100 4R 2026 - Dark Blue

The item is pretty much like new. Reason for selling - change of setup. Although it is an amazing piece of gear. It is NOT a guitar preamp, it is a complete 100W guitar head with 4 channels.

AMT Electronics has a dedicated European and North American offices for repairs of their equipment.

For this item there is still a one year warranty.

It is by far the closest Solid-State amplifier that sounds like a Tube amp.

From AMT Website:

When using micro-triodes, the vacuum-tube circuitry of the prototypes remains virtually unchanged, only power supply goes down K times, and the signals in micro-triode-based devices are simply K times reduced copies of these in the vacuum-tube prototypes, reproducing both all the subtleties of inter-cascade signal changes and the nuances of interaction between the cascades.

Quick Specs:

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

Architecture and features of guitar amplifier SH-100-4R

– Preamp section consists of four completely separate channels.

– Each amplifier channel has a separate equalizer, controls for sensitivity and output level.

– The amplifier has an effect loop with the possibility to turn it off.

– It is possible to work with specialized guitar cabinets (8 Ohm, 16 Ohm plugs), and directly with the mixing board or linear amplifier (through OUT CAB. S. outlet). There is a balanced XLR output and a separate headphone output.

– Power amplifier allows you to work on load of 8 or 16 Ohm. In both cases output power will be 100 W.

– Powering on the amplifier without a load does not lead to amplifier’s failure – unlike with tube amps.

The first channel can operate in two modes: CLEAN and CRUNCH. CLEAN mode focuses on classic clean sound with graceful easy limitation in maximum sensitivity mode and crystal clearness and brightness in a zone of moderate values of sensitivity. CRUNCH mode has a broad range of sensitivity adjustments. This, in combination with flexibility of output tone control, allows to get any sound from a slightly loaded clean signal to significantly loaded dense and bright guitar sound through a channel in this mode. First channel is equipped with an additional VOICING regulator, widening the range of tone control.

Second channel is clear, unlike the first, and gives a much higher total amplification of guitar signal. The channel has classical sensitivity and level controls, equalizer with three regulators, switch between two modes which differ by a general level of sensitivity and the final tone. LOW mode gives a rounded sound perfectly suitable for many lighter music styles. HIGH mode has more vivid «modern» sound.

The third channel is the most universal. With the additional VOICING regulator the range obtained with the help of its overloads extends from classical English amps to heavy modern «Americans».

The fourth channel has the most aggressive sound. Channel is marked out by spectral and tonal balance, which allows to achieve bright flageolets and readability of fast passages. Two channel’s modes allows you to choose more rich or more dry sound. The power amp section has two switchable volume adjusters for MASTER VOLUME, and also for PRESENCE and RESONANCE.