AMT SS-11A -Fully tube-based 4 stage overdrive channel with DUAL TUBE design (2x12AH7 tubes) with high-voltage anode voltage (+300 V). -Three separate channels: CLEAN / OVERDRIVE / LEAD -Individual gain sensitivity and output level controls for clean and crunch/lead channels. -TREBLE SHIFT toggle switch to enter bright mode for that added punch of high end. -FX LOOP for external effects. -OUTPUT jack for connecting to both specialized guitar amplifiers with a standard level of 0 dB (GUITAR AMP mode) and a CAB SIM MIXER out with a standard level of -10dB and a guitar cabinet simulation. -The preamp outputs are equipped with sophisticated solid-state buffers. -SS-11 incorporates new field-effect transistor-based guitar cabinet impulse response emulator processing. Improved naturalness of sound when connected to line input. -Special attention was paid to transistors anode power quality: preamp uses a specially designed high-voltage transformer minimizing the penetration of impulse noises into amplified signal.