These circuits and methods provide many practical and audible benefits:

• High loop gain (>75dB) in the entire audio band

  • This figure corresponds to an unprecedented 110MHz Gain-Bandwidth Product and produces consistent ultra-high performance across the audio spectrum unmatched by audio amplifiers of any technology or operating class.

• Negligible Intermodulation Distortion (IMD)

  • A very good measure for how well an amplifier handles complex signals. Sonically low IMD means a highly resolved and stable stereo image across the whole spectrum, even during very complex and busy passages.

• THD remains extremely low at any frequency and any power level right until clipping

  • Translates into a total lack of sonic signature, and an ability to reproduce any type of music without preference for genres or production style.

• Negligible output noise

  • No audible noise. Deep black silences and a generous and detailed sound even at very low playback volumes.

• High power supply rejection ratio (PSRR)

  • The module places no particular demands on the power supply quality. A simple off-the-shelf unregulated SMPS will not degrade audio performance.

• Load-invariant frequency response and negligible output impedance

  • The amplifier handles difficult loudspeakers with ease, including those that challenge most other amplifiers.

• Controlled, second-order low-pass response

  • Very flat audio-band response with a sensible, 60kHz bandwidth.

  • Reduced sensitivity to out-of-band noise from DACs, reducing the requirements on the DAC reconstruction filter. This leaves a shorter signal path between DAC and loudspeaker.

  • Problem-free operation with outboard DACs over which you may have no control.

• Very low idle losses and reduced electromagnetic interference (EMI)

  • The enormous loop gain allows relaxed timing of the power MOSFETs without degrading audio performance.

  • Idle losses are minimized.

  • Very little to no effort needed to pass regulatory tests.

• Exceptionally clean clipping and clipping-recovery in both voltage and current domains

  • Clips cleanly and recovers immediately without “overhang”. Current limiting is equally instantaneous and glitch free. This guarantees the smallest amount of audible artefacts when pushed into clipping or overload protection.