SUQIYA Referencing the British Musical Fidelity A1 circuit 25W pure Class A integrated amplifier

The direct-print British Fax A1 amplifier features a pure Class A design, a meticulously optimized dual-mono layout, single-point star grounding, a custom-designed shielded high-performance 120W toroidal transformer, Novartis filter capacitors with a total capacitance of 40,000μF, a fully discrete component amplification circuit, selected power transistors of the same model as the original unit, Japanese imported ALPS potentiometers and power switches, and an all-aluminum alloy chassis for excellent heat dissipation. It delivers 25W per channel at 8 ohms (equivalent to 75W in a Class AB amplifier) ​​and 60W per channel at 4 ohms (equivalent to 180W in a Class AB amplifier). The sound is relaxed and natural, especially the captivating fullness of the mid-low frequencies; the timbre is warm, vibrant, and delicate without sacrificing resolution and dynamics; the three frequency ranges are extremely smooth, with high density in the mid-low frequencies and strong vocal impact; the slightly faster high-frequency roll-off effectively eliminates sibilance in poorly recorded vocals; and the soundstage is accurately reproduced and positioned.

The A1 circuit was first designed in 1982 by the late British audio genius Tim de Paravicini. Its prototype was an experimental circuit Tim built on a breadboard, aiming to achieve the same sound quality as a vacuum tube amplifier using transistor amplification.

The A1 is an integrated amplifier employing a pure Class A circuit design, achieving a warm and sweet sound with excellent musicality. While its power output of 25W per channel isn’t particularly high, its excellent design and strong current output capability are sufficient to drive home bookshelf speakers or small floorstanding speakers, showcasing excellent sound quality.

Since 2009, we have been deeply studying the circuit design of the British Fax A1 for over 15 years. We have now mastered its essence, and it’s no exaggeration to say that our A1 amplifiers have the best sound among similar products! We launched the A1 amplifier back in 2011, and its superior sound quality quickly won market recognition at the time. Today, we reintroduce the all-new A1 amplifier, employing Tim de Paravicini’s original design philosophy. Its meticulously optimized dual-mono layout, star-shaped single-point grounding design, and precision-crafted modern high-performance electronic components elevate the A1 to a whole new level in terms of distortion, channel separation, and signal-to-noise ratio, fully showcasing the unique characteristics of the A1 circuitry. The new A1 delivers exceptional musicality, a realistic and immersive soundstage, a warm and delicate sound with a strong sense of airiness, and profound emotional expression, allowing listeners to be completely immersed in the music—unforgettable and captivating.

Model: A1

Output Power: 25W + 25W (8 ohms)

Distortion: 0.003%

Signal-to-Noise Ratio: 84dB

Dimensions: 245mm*258mm*93mm (W*D*H)

Weight: 5.05KG

Input Voltage (AC): 230V/50Hz, 115V/60Hz (optional)

Inputs: RCA*1, Outputs: 4mm banana plugs*4

Power Consumption: Maximum 130W

Pure Class A design, no crossover distortion, high linearity.

Professionally customized shielded high-performance toroidal transformer, providing powerful output while effectively isolating harmful grid noise and improving signal-to-noise ratio.

High-speed rectifier circuit for fast response.

Up to 40000uF high-performance audio filter capacitors, with CRC filter circuitry to reduce power supply ripple.

Selected modern electronic components, high precision, excellent performance, and long service life.

Precision-matched transistors effectively reduce distortion and improve overall linearity.

Dual mono design isolates interference between channels, creating a more immersive sound field.

Single-point grounding design reduces background noise, resulting in a quieter background and richer detail.

All-aluminum alloy chassis for excellent heat dissipation, stability, and reliability.