hifi engine

Manual Library / QED


Signal Path Optimised Stereo Amplifier

add a review add a review



The QED A240CD amplifier is fitted with a balance control which can be bypassed - this is achieved by turning the control fully anticlockwise until a switch off click is heard.

Used this way, the amplifier is fully signal-path-optimised, with the superior plastic film volume control further eliminating signal degradation.

The A240CD may be upgraded to SA specification by replacing the standard disc input board with the Super Analogue board.


Power output: 40 watts per channel into 8Ω (stereo)

Frequency response: 20Hz to 20kHz

Total harmonic distortion: 0.1%

Input sensitivity: 3mV (MM), 300mV (line)

Signal to noise ratio: 72dB (MM), 80dB (line)

Dimensions: 355 x 237 x 64mm

Weight: 5.25kg

Year: 1989

Price: GBP £249 (1989)


instruction/owners manual   English - koorbrats

series 2 service sheet   English - Raul_77

If you have any problems opening files please read the download FAQ. All files are provided under strict licence and reproduction without prior permission or for financial gain is strictly prohibited.

If you have additional documentation please consider donating a copy to our free archive.


re: A240CD

Great site, nice clear diagrams and information.

Thanks, Ed

This website is not affiliated with or sponsored by QED. To purchase A240CD spares or accessories, please contact the company via their website or visit an authorised retailer.