Rare opportunity to see a Hughes & Ketter Fortress pre-amp in excellent condition. It's a German-made hybrid bass preamp sporting 2 Mullard tubes. Unlike some starved plate designs, this one actually acts like a tube pre when engaged. Also offers a crossover, 3 different FX loops, DBX chip compressor and more. Check the picture for EQ choices and features. Overall, it's in pretty good condition. Some specs: Six-Band EQ: Contra - Centered at 50 Hz, 24dB/octave slope Bass - 120 Hz Voice - Low mids at 220 Hz Mid - 550 Hz, switchable Bite - 2 Khz Edge - 6 Khz Bass Boost - 7dB at 100 Hz Treble Boost - 9 Khz Tube On - Activates valves Tube Direct - Bypasses all transistor circuitry, tone controls, and effects loops, runs signal straight through the tubes Tube Gain - Input of signal reaching tubes Tube Volume - Amount of tube driven signal mixed with original signal Compressor Attack - Controls how quickly compressor kicks in Compressor Intensity - Decay, controls sustain and fatness Headphone Out Crossover Capable Output - Crossover ranges from 90 to 1100 Hz 1/4" Line Out XLR Balanced Line Out Loop Send and Return - Can be set to Pre or Post EQ as well as Line or Intrument level Parallel Effects Loop Serial Effects Loop - With Gain control The power amp is nothing special: a Peavey DECA 528 2x250W @ 4 Ohm. The biggest upside of this rig is that you can easily power two 4 Ohm cabs. Freq. response +0, -1.5dB 10Hz to 20 kHz @ 1W RMS into 4 Ohm Rated Power output: 250W RMS per channel into 4 Ohms with less than 0.3% total harmonic distortion Total Harmonic distortion: less than 0.15% @ 250W RMS per channel into 4 Ohms Transient intermodulation distortion: none (0% TIM) Inout Sensitivity: 1.0V RMS for 200W into 4 Ohms Load Protection circuit Power consumption: 600W Weight: 5.4kg The rack case is in perfect working condition, but less than good cosmetic shape. No dings, but it's been used for many years and it has lost the shine in the silver parts, and it has road rash everywhere. I use it anyhow, couldn't care less, but you may want to know in advance.