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Quad 303 Power Amplifier (2024)

£1,199.00£2,398.00 inc. VAT

Trade-in available.

Very few hi-fi components are as instantly recognisable as the Quad 303 Power Amplifier, and now Quad Audio have reimagined and re-released their iconic 303 Power Amp for 2024 and beyond.

One of the most popular models in the history of one of the world’s most poignant hi-fi brands, the Quad 303 – and accompanying 33 Preamplifier – are benchmarks in almost every angle of desirable audio equipment; performance, reliability, industrial design, value and musical romance.

Available in Classic Quad Grey finish only. Also available as 33 / 303 Combination Bundle.

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Brand:Quad
 

Description

303 Power Amplifier

A dream team of Rob Flain & Paul McConville (the world’s most experienced QUAD service engineers), Jan Ertner (30 years of experience in QUAD design), Peter Comeau (the acoustic director behind some of QUAD’s most successful loudspeakers) and David McNeill (the industrial designer responsible for two decades of QUAD innovations) were all a part of this labour of love, making no compromise in the demand for a product that could bear the name of 33 and 303.

The QUAD 303 power amplifier was intended for normal domestic use with loudspeakers of moderate efficiency, but was also used by broadcasting and recording studios, worldwide, who appreciate its excellent performance and dependability. The ethos hasn’t deviated.

Function

The outstanding performance of the QUAD 303 is still celebrated to this day, and is largely due to the unique output circuit developed by QUAD.

In reissuing the QUAD 303 power amplifier concept, exactly like the matching 33 preamplifer, QUAD’s incomparably experienced service team was matched with the equally adept engineering team to reinvoke the design, romance and performance in a thoroughly modern iteration of a hi-fi legend.

As with the new QUAD 33, every aspect of design and performance has been analysed and re-engineered way beyond simply modernising components and refreshing of specifications.

Circuitry

Much like the original, the new QUAD 303 maintains its faithfulness to the original by employing the famous QUAD Symmetrical Triples, employed to provide a completely symmetrical output stage, greatly reducing distortion and rendering the resting current independent of output transistor temperature.

This development enables the designers to reduce distortion to emphatically low levels without sacrificing stability and to maintain this excellence under all dynamic conditions.

To put this in perspective, the lowest theoretical distortion present on the very source material will still be some hundred times greater than that the QUAD 303.

Design

The industrial design of the new QUAD 303 is instantly recognisable and is true QUAD.

The anodised chassis CNC-routed heat sinks on either side offer enduring quality which the tank housing also provides a rugged structure that resists interference from external vibrations.

Features

  • Revisiting of the original hi-fi design classic.
  • Class AB Power Amplifier
  • QUAD 303 Triples Output Stage
  • Custom 200 VA Toroidal Transformer
  • Stereo / Bridge mode selection

Specifications

  • Model: QUAD 303
  • Description: Power Amplifier
  • Inputs: 1 x Line, 1 x XLR
  • Outputs: 1 x 12 V Trigger, 1 x Stereo Speaker, 1 x 12 V Trigger (Link)
  • Gain: +29 dB
  • Rated Power Output:
    • Stereo: 2 x 50 W (8 ohms, THD <1 %)
    • Stereo: 2 x 70 W (4 ohms, THD <1 %)
    • Bridged: 140 W (8 ohms, THD <1 %)
    • Bridged: 170 W (4 ohms, THD <1 %)
  • Frequency Response: 20 Hz – 20 kHz (+/-0.3 dB)
  • Total Harmonic Distortion (THD): <0.002 % (1 kHz)
  • Input Impedance: 10 kOhms
  • Input Sensitivity: 700 mVrms (Line), 1.5 Vrms (XLR)
  • Signal-to-Noise Ratio (S/N): >108 dB (A – weighted)
  • Max. Output Current: 10 A
  • Standby Power Consumption: <0.5 W
  • Net Weight: 8.4 kg
  • Dimensions (W x H x D): 120 x 176 x 325 mm
  • Finish: Classic QUAD Grey
  • Power Requirements: 220 – 240 V – 50 / 60 Hz, 100 – 120 V – 50 / 60 Hz

Included

  • 1 x 303 Power Amplifier
  • 1 x Power Cord
  • 1 x Remote Control
  • 1 x User Manual

Full Quad Range Available

Unilet Sound & Vision are official retail partners for Quad Audio, providing sales, advice and assistance on their entire range of high-quality products. Please do get in touch if you would like a demonstration or wish to purchase.

More Information

Additional information

Weight 8.4 kg
Dimensions 32.5 × 12.0 × 17.6 cm
Colour

Classic Quad Grey

Bundle Options

with Quad 33 Preamplifier, Standalone Purchase

Purchase Options

Home Delivery, Click & Collect, Trade-In Available

Brand

Quad

The history of Quad is one of technical achievement in the field of sound reproduction. It is a story that began with their first amplifier, which applied fifteen years of knowledge and experience in professional audio and industrial products to the task of making the most accurate domestic audio amplifier of its age.

Every product in the Quad portfolio of amplifiers, headphones, moving-coil loudspeakers and electrostatic loudspeakers have received international acclaim. However, Quad has never indulged in technical one-upmanship. Their technology exists for a purpose that has remained constant over the years - to reproduce music in a form that is the closest approach to the original.

Unilet Sound & Vision are one of the longest-established official Quad dealers in the UK, and one of only a handful of dealers for Quad Electrostatics in the entire country.

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