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Quad FM4

FM Stereo Tuner (1984-90)

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Quad FM4


The Quad FM4 is an FM only tuner with manual tuning and 7 presets. It is styled to match the Quad 44 preamplifier.


Type: Mono/Stereo Tuner

Tuning Bands: FM

Tuning Scale: Digital

FM Tuning Range: 88 to 108 MHz

Sensitivity: 2.7uV (FM)

Signal to Noise Ratio: 70dB (FM)

Distortion: 0.15% (FM)

Selectivity: 53dB (FM)

Frequency response: 20Hz to 15kHz (FM)

Output: 100mV

Dimensions: 321 x 64 x 207mm

Weight: 3kg


instruction/owners manual   English -

brochure   English -

11000 on schematic   English - FidelityResearch

service manual   English - Ivy Caudieus

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FM4 and 44

I think it would suit my 34/306 a little better than the stated 44, which is styled differently. At the age they are now, watch out for a defective battery leaking onto circuit board and scrambling the memory circuits. If it is working okay and it has never been serviced, that battery is twenty years old! have it replaced, now! Anyone want to swap one for my Techniks? Thought not.

re: FM4 and 44

I have just bought a well used FM4 after selling them at a HIFI shop when I left school in the 1980's.
The battery had leaked along with a few of the electrolytics. Also the two 1000uf filter caps were getting very warm in the PSU so these were replaced to prevent the transformer frying and reduce ripple.
These checks MUST be made if you are going to use the tuner every day.
Also a increase in the audio coupling capacitors to 1uf greatly improve the early bass rolloff when using a 47 K input.

This website is not affiliated with or sponsored by Quad. To purchase FM4 spares or accessories, please contact the company via their website or visit an authorised retailer.