What’s New? Quad PA-One+ Valve Headphone Amplifier features a re-engineered board for a greater output power of 500mW into 32ohms, broader frequency response and vastly enhanced signal to noise ratio. The inclusion of an improved ESS Sabre 9018 K2M DAC enables PCM playback up to 384kHz and DSD256. The internal QUAD valve circuitry is also redesigned for more efficient performance.
Premium Valves Quad PA-One+ uses carefully selected dual 6SL7 and dual 6SN7 amplification valves to deliver the latest technology in perfect harmony with traditional Hi-Fi.
Different Formats Designed to help high-end headphones reach their full potential through radically improved amplification, the effortless and effective PA-One+ supports a remarkably wide selection of digital and analogue sources so you can enjoy music without needing to worry about decoding different formats.
Connectivity PA-One Plus offers a range of analogue inputs for maximum versatility including gold plated RCA input, 6.3mm headphone jack, 4-pin XLR balanced headphone input, 3-pin XLR balanced input and gold plated RCA pre-out (for use as a Pre-amp). Digital connections are also catered for via USB input with PCM playback up to 384kHz and DSD256 and gold plated coaxial and optical inputs.
The history of Quad is one of technical achievement in the field of sound reproduction. It is a story that began with the Quad 1 amplifier, which brought the benefits of 15 years knowledge and experience in professional audio and industrial products to the task of making the most accurate domestic audio amplifier of its age.A few years later, in 1953, the product which set the standard for amplifiers was the Quad II Power Amplifier, the time of Queen Elizabeth’s Coronation and the year in which Mount Everest was finally conquered. This amplifier pioneered the principle of cathode coupling through the output transformer to reduce harmonic distortion to almost negligible levels. Such was its clear superiority that this model remained in production for 18 years. Three years later, in 1956, Quad demonstrated the first true full-range electrostatic loudspeaker. This remarkable product (known later as the ESL 57) used a virtually mass-less plastic film as a moving diaphragm between two charged plates. Compared with moving coil loudspeakers, the ESL 57 was free of unwanted colourations and distortions. This landmark product remained in production, virtually unchanged, for 28 years.
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