T-50SPA Stereo Power Amplifier

Technology

Using current feedback with exceptionally high bandwidth and a minimal component count, this solid-state class A/B stereo power amplifier is capable of giving a gripping and propulsive performance way beyond that suggested by its power rating.
Power amplifiers are often severely disadvantaged by high levels of microphonic noise, robbing the signal of dynamic energy and accuracy. During the development phase, our primary objective of this design was to prevent these effects.

Specifications

Technology

Using current feedback with exceptionally high bandwidth and a minimal component count, this solid-state class A/B stereo power amplifier is capable of giving a gripping and propulsive performance way beyond that suggested by its power rating.

Power amplifiers are often severely disadvantaged by high levels of microphonic noise, robbing the signal of dynamic energy and accuracy. During the development phase, our primary objective of this design was to prevent these effects. The culmination of this work has achieved this goal in four ways:

• With a robust power supply employing a custom-wound 500VA transformer and low-microphonic components, all fully coupled to vibration absorption technology.
• By using significant vibration protection in and around the sensitive analogue input stages.
• By employing a dual-mono topology. Critically, this includes independent low resonance, acoustically disruptive heatsinks for the left and right output devices.
• Exceptionally high quality filter capacitors resulting in a low impedance and highly responsive power supply

Casework is machined using high-grade aluminium and uses Quiescent proprietary techniques for managing vibration and electrical noise preventing signal damage in the sensitive circuitry. The top of the unit is a high-grade non-metallic plate preventing the unwanted effects caused by the Faraday cage.

Addressing the problems of vibration allows us to maximise the other key features of the amplifier. Current feedback and high bandwidth offer speed and precision that is detailed and transparent with exceptionally low phase error resulting in superb imaging and soundstage. Additionally, extensive EMI and RFI reduction throughout keeps noise and RF intermodulation very low for an extremely low noise floor.

Specifications