The AIRCHILD Six Sixty Compressor is a sonic interpretation of the renowned vintage 660 studio compressor. We have used the original 660 and 670 (stereo) compressors, which are consistently rated as the best compressors, in our studios for many years. Traditional guitar compressors have created highly recognizable tones, especially throughout the history of country music. However, we felt that the legendary circuit had too many clones already, with few other variations. Traditional compressor circuits tend to squash the sound like a limiter, and this effect is often prized in certain genres of music. We wanted to create a compressor that functions like a studio compressor, enhancing harmonic richness and evening out the sound without squashing the dynamics. The AIRCHILD Six Sixty simply makes you want to play more, increasing sustain without crushing the output, adding richness to the overall tone, and adding feel to your playing. We aimed for the slide tone of Lowell George and the singing lead/rhythm tone of Mark Knopfler. Power: Use only 9V/DC center negative. Current consumption 20mA. (No internal battery option) #tgakki Tsukamoto Gakki