Quad 303 Power Amplifier
Stereo Solid State Amplifier
The Quad 303 power amplifier was a breakthrough in 1967 - one of the first truly high-fidelity solid-state designs. The new 303 carries that legacy forward with modern components, a refined circuit, and the same effortless musicality that made the original a classic.
Reengineered for today’s systems, it preserves the spirit of the original while improving performance and usability. The result is an amplifier built around clarity, composure, and long-term listenability.
Delivering 50 watts per channel into 8 ohms, the 303 pairs wide bandwidth and low distortion with a sense of control that holds together under load. Updated output devices and a fully regulated power supply ensure stable, quiet operation, while the compact chassis retains the understated, mid-century character that defined the original.
Built for Modern Systems
With both balanced and single-ended inputs, the 303 integrates easily with contemporary preamplifiers and sources. Updated protection circuits and a regulated power supply contribute to its low noise floor and long-term reliability.
It’s a natural partner for the Quad 33, carrying forward the intent of the original pairing in a modern context. At the same time, its composure and control make it an ideal counterpoint to a tube preamplifier—bringing balance and grip without losing musical flow.
Equally at home in a minimal system or as part of a more developed setup, the 303 is designed to be paired thoughtfully and lived with over time.
Specifications
Configuration: Class A/B
Rated Output, Stereo: 50W 8Ω, 70W 4Ω @THD<1%
Rated Output, Bridged: 140W 8Ω, 170W 4Ω @THD<1%
Inputs: Selectable single-ended RCA or balanced XLR
Speaker Outputs: 5-way binding posts
Frequency Response: 20Hz - 20kHz (+/-0.3dB)
Signal to Noise Ratio: >108dB (A - weighted)
Total Harmonic Distortion: <0.002% (1kHz)
Dimensions (H x W x D): 6.9 x 4.7 x 12.8 in
Weight: 18.5 lbs