Burson Audio HA-160 Reference Class Headphone Amp HA160 The HA-160 has been designed with no ICs within its circuitry. Our discrete (IC free) approach allows us to optimise our design and tune our machines to achieve the best in audio reproduction. A performance focused volume control - Burson developed a 24 stepped attenuator, constructed with the best quality components available. Our Burson stepped attenuator ensures preservation of even the weakest audio signal; The air between instruments, the decay after an attack and all micro details that makes music enjoyable. Resonance Free Aluminium Enclosure - The HA-160 is housed in a 6mm case, constructed from high precision machined aluminium. This enclosure allows the AB-160, to achieve a very high mechanical damping factor, which reduces any microphonic effects, that may degrade the clarity of sonic performance. Cleaner Power - Just like an athlete needs clean air to perform at an optimum standard  audio equipment needs clean power to reproduce transparent and natural music. Higher Definition - The function of Opamps at the output stage is as important as the lens on a cinema projector. Regardless of the analytical capability of the audio gear, an inferior opamp will halve a machines performance, and distort every dB of sonic imagery.