Qualities of the Quad 303 Power Amplifier
Designed mainly for domestic use, the Quad 303 Power Amplifier is a two-channel stereo power amplifier that was manufactured by the British company, Quad Electroacoustics between 1967 and 1985. Now it's a much sought-after, vintage amp due to its much-admired design. If you're looking for a Quad 303 Power Amplifier, you'll find a tempting selection of previously used models available on eBay. Many of the models on offer have been given the care they deserve by their owners and are in almost pristine condition.How powerful is the Quad 303 amplifier?
The amplifier is designed to deliver up to 45 watts of power per channel to a pair of loudspeakers with impedance values of between 4 and 16 ohms. The amp was designed to be matched to the company's own ESL 57 electrostatic speakers, but any high quality speakers within a 4 to 16 impedance range and capable of handling 45 watts of power or more will work well with the Quad 303 Power Amplifier.How large and heavy is a Quad 303 Power Amplifier?
Solid, sturdy and weighing 8.2 kilograms, the Quad 303 Power Amplifier stands 159 millimetres in height, is 120 millimetres wide, and has a depth of 324 millimetres. See the manufacturer site for details.What makes the Quad 303 Power Amplifiers so popular?
The quality of construction and the design of its internal circuitry provide performance characteristics that are still highly impressive. These include:
- Frequency response: With a frequency response of 30Hz to 35kHz, you can enjoy a very wide audio spectrum from the deepest bass notes, through the mid-range frequencies and all the way up to the highest limits of human pitch audibility.
- Signal to noise ratio: The amp's 100dB signal to noise ratio ensures that any generated noise from the internal electronics will be insignificant compared to the strength of the audio signal.
- Total harmonic distortion (THD): The 303's THD of 1% ensures extremely faithful signal transfer through the amplification stages, resulting in high signal purity being delivered to the loudspeakers.
- Ventilation: The outer casing of the amp is designed with ventilation grills and fins that dissipate generated heat very efficiently. This enables the amp to run continuously with no adverse effects on its performance.