Compressor may not be the most obvious effect in the world, but the difference it can make to your tone when used correctly will surprise you! It is the silent wonder of the guitar world, which is why Tone City have designed their very own stompbox, the Comp Engine. Squeeze Your Tone There are two very common ways to use a compressor. One method is by turning the threshold (comp control) up high, delivering a very squashed sound that brings out the attack in your notes and smooths the level out. That is perfect for blues, jazz and funk in particular, where that consistency is vital when playing chords or lead lines. The other way that you can use a compressor is by running it into a slightly distorted rig. With just a small amount of compression and a lot of volume, this method provides incredible sustain. Ever wondered how some guitarists get their notes to ring out for so long at the end of a solo? It was most likely by employing a compressor in this way. The Comp Engine, with its 3 essential controls, can let you run your compression exactly the way you want - perfect for either method described above. Small Portable All Tone City pedals are built in a micro pedal format, which not only helps to save precious real-estate on your pedalboard, but also keeps your bank balance healthy thanks to their amazingly low price. But don't worry, you don't lose any quality when going down to this small size or cost. The controls all use high-quality components, and with true bypass switching, your signal will stay as clean and pure as possible. Specifications: Technology: Analog Input Impedance: 500k Output Impedance: 10k Mono / Stereo: Mono In, Mono Out Controls: Volume, Attack, Comp Bypass Mode: True bypass Power supply: 9VDC, Center negative Power Consumption: 8 mA Housing size: Mini Dimensions WxHxD (cm): 4,2 x 5,2 x 9,3 Note: Power supply not included. Please use the 9V power adapter whose polarity is negative center otherwise, the product may not work properly. Package List: 1 * Effect Pedal 1 * User Manual(English Chinese) No Duty to Canada and USA Free USA Shipping