The ZEN CAN Signature 6XX features a switchable ActivEQ equalizer specifically designed to get the most out of the HD 6XX. One button press is all it takes to calibrate the amp’s signal to complement the HD 6XX’s frequency response characteristics, which results in its performance tailored to precisely fit these headphones like a made-to-measure suit. What’s more, ActivEQ does this without adding any of the distortion commonly associated with passive equalization circuits.
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