Cambridge Audio C75

An integrated amplifier produced by Cambridge Audio.

Overview

The Cambridge Audio C75 is an integrated amplifier designed as a high-end model in the company's lineup, competing with more expensive Japanese and American amplifiers of its era. Reviewers praised its clean, detailed sound and robust construction, often describing it as a "giant-killer" that delivered performance rivaling amplifiers costing twice as much. Owners report it to be reliable, well-built, and surprisingly powerful, though it tends to run warm during operation.

Specifications

Power output	75 watts per channel
Frequency Response	20Hz–20kHz (±0.5dB)
Total Harmonic Distortion	<0.005%
Signal-to-Noise Ratio	>100dB
Inputs	5 line inputs
Outputs	Tape out, preamp out

Design

The C75 features a fully discrete, direct-coupled amplifier circuit with a massive toroidal transformer and separate power supplies for the preamp and power amp sections, contributing to its high performance and build quality.

Context

Positioned as a high-end model in Cambridge Audio's lineup, the C75 was engineered to challenge more expensive amplifiers from Japan and the United States, offering exceptional value and performance in a competitive market segment.

Market

The most common issue with the C75 is the need to replace the main power supply capacitors after 20+ years of service, as the originals can dry out and cause hum or reduced power. A full recap of the power supply and audio path capacitors is recommended for units in long-term storage or heavy use. The proprietary speaker relay is difficult to source but can be replaced with equivalents.

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