And the parameters themselves have so many tweak-able qualities and sub-parameters that you'd be hard pressed not to find the sound/s that you are looking for! And the unit is very intuitive..... Even I can figure out the basic operation without the manual!But if you really want to get the full understanding of the capabilities of this amazing preamp/multi-effects unit, you can download and print the manual from the internet. Please read the condition description. This rackmount also includes the necessary 4-pin power supply to operate the unit. The item "Alesis Quadraverb GT, Guitar Multi-Effects Processor/Preamp Classic Rack Unit" is in sale since Wednesday, August 3, 2016. This item is in the category "Musical Instruments & Gear\Pro Audio Equipment\Signal Processors/Rack Effects". The seller is "heavyspender" and is located in Fort Mill, South Carolina. This item can be shipped to North, South, or Latin America, all countries in Europe, all countries in continental Asia, Australia, South africa, New Zealand, Egypt, Reunion.