Cambridge Audio Topaz SR20 Stereo Receiver

Product Research


Stereo Amplifier: 

  • The Cambridge Audio SR20 stereo receiver employs a fully-discrete, high-power, class A/B amplifier rated at 100 watts RMS x 2-channels. The amplifier can handle impedances between 4 and 8 ohms.

Toroidal Transformer: 

  • The Cambridge Audio SR20 stereo receiver employs a powerful toroidal transformer. Benefits of a toroidal transformer include:
  • High quality power output to the amplification circuits, with no clipping, transformer noise, buzz or hum, to provide a consistent signal.
  • High power output, to allow large and demanding speakers to be driven at high volumes with sensational bass performance.
  • Large power reserves, to allow the transformer to deliver high peaks of volume when required.
  • Fully shielded against internal and external electrical interference, to maintain quality of power and signal.

Acoustically Damped Metal Chassis: 

  • Electronics (and therefore sound quality) are particularly susceptible to vibration; that's why Cambridge Audio used a low resonance, acoustically-dampened metal chassis to eliminate as much vibration as possible, ensuring that the most sound quality is extracted from every source.

Wolfson DAC: 

  • The Cambridge Audio SR20 stereo receiver utilizes a 24-bit/192kHz Wolfson DAC (digital-to-analog converter) for exceptional sound quality.


  • The Cambridge Audio SR20 stereo receiver features a variety of connectivity options with analog, digital, and phono inputs.
Digital Inputs: 
  • The SR20 offers digital connectivity with two optical (toslink) digital inputs and one coaxial (RCA) input. The digital inputs will accept 2ch PCM audio. The optical input supports up to 96kHz, while the coaxial input supports up to 192kHz.
Analog Inputs:
  • The stereo receiver includes a total of five analog audio inputs; 3 stereo RCA inputs, Phono input, and a front-panel 3.5mm input.
Phono Input: 
  • The SR20 features a Phono input for connection of your turntable. Turntables fitted with phono cartridges of either the Moving Magnet (MM) or high output Moving Coil (MC) type (between 2-6mV output and 30-50k load impedance) can be used.
Front-Panel Aux Input: 
  • The Cambridge Audio SR20 stereo receiver features a front-panel 3.5mm auxiliary input for temporary connection of a portable digital audio player. Connecting an audio device to the front-panel 3.5mm auxiliary input will override the unit's rear-panel RCA auxiliary input.

AM/FM Tuner (w/ RDS): 

  • The Cambridge Audio SR20 stereo receiver features a built-in AM/FM with manual, seek, and preset tuning. You can store up to 30 AM/FM station presets (15 each). The built-in AM/FM tuner features RDS for station name display on FM stations that support this function. For low quality stereo FM signals, selecting the Mono mode can reduce the noise and improve reception. You can also select between US or European tuning.


  • The Cambridge Audio SR20 stereo receiver offers A-B speaker outputs, a mono-RCA subwoofer output, and front-panel headphone jack.
A-B Speaker Outputs: 
  • The Cambridge Audio SR20 is equipped with A & B speaker terminals to connect two pair of loudspeakers or bi-wire a single pair of loudspeakers. You can select which speaker outputs are heard - A speaker only, B speaker only, A+B speaker, or Off. The amplifier can support a 4-ohm load when driving only one pair of speakers. The amplifier can support an 8-ohm load when driving two pair of speakers.
Subwoofer Output: 
  • A single rear-panel mono-RCA subwoofer output is used to connect a powered subwoofer for a 2.1ch speaker system. The sub out has a fixed 200Hz low pass filter.
Record Output: 
  • There is a stereo Record Output for connecting a CD recorder.
Headphone Jack: 
  • The Cambridge Audio SR20 stereo receiver is equipped with a front-panel 1/4" headphone socket for connection of a set of headphones. The amplifier's speaker outputs are muted when headphones are connected. Headphones with an impedance of between 32 and 600 ohms are recommended.


  • The Cambridge Audio SR20 features front-panel controls and comes supplied with an IR remote control for wireless operation of the stereo receiver. The included remote control will also operate playback function of the Cambridge Audio CD10 CD player (779CD10, sold separately).
  • The Cambridge Audio SR20 features a front-panel rotary dial to increase or decrease the level (-80 to 0) of the sound from the speakers outputs and headphone output of the unit. You can also use the included remote control to adjust the volume level.
Bass & Treble: 
  • The Cambridge Audio SR20 offers Bass (100Hz) and Treble (20kHz) controls which are adjustable from -10 to +10dB.
  • The unit also allows you to balance the unit's speaker outputs left-to-right (+/-10).

Front-Panel LCD: 

  • The Cambridge Audio SR20 stereo receiver features a front-panel LCD for the display of information, such as the selected input source, station identification, volume, and tone/balance level.
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