An Aphex spokesperson told Sonic State, "Headphone amp designs built on a single channel of amplification suffer from degraded sound quality and volume levels when multiple, mismatched headphone loads are connected. HeadPod 4 overcomes the limitations of typical headphone amps through the use of four completely independent stereo amplifier channels that ensure minimum distortion and crosstalk regardless of the headphone loads connected, resulting in consistent volume levels, crystal clear audio and no clipping."
Top panel controls include a separate level control for each of the outputs together with a master level control, and an input source selector. The rear of the unit houses a pair of balanced quarter-inch jacks, a single stereo headphone extension input and a digital S/PDIF connection.
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