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Yamaha C-4

Natural Sound Stereo Control Amplifier (1979-81)

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Yamaha C-4

Specifications

Frequency response: 5Hz to 100kHz

Total harmonic distortion: 0.0035%

Input sensitivity: 0.1mV (MC), 2.5mV (MM), 150mV (line)

Signal to noise ratio: 77dB (MC), 85dB (MM), 100dB (line)

Channel separation: 85dB (MM), 85dB (MC), 85dB (line)

Output: 150mV (line), 2V (Pre out), 10V (Pre out Max)

Dimensions: 435 x 116 x 376mm

Weight: 8.6kg

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Reviews

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rating
Reviewed Aug 15th, 2018 by Vanningale

To me this is one of the great pre-amps. The MC moving coil Preamp is absolutely superb, it's the principle reason to own this unit, if your a vinyl lover, and you've moved up to the vastly superior MC cartridges from the MM Moving magnet stylus cartridge then a critical front end is essential. I used to own the Yamaha HA-1 MC preamp for my Yamaha C-1, however I sold that and the HA-1, and still have what I think is the best of all worlds with this pre-amp. I'll reserve the score of 10 to the Yamaha C-1 for technical reasons. However the C-4 is sonically impressive in it's openness and transparency. Compared to the C-2a it's a close second, and easily superior to my other reference Preamp the Hitachi HMA-7500 which I also love.
C-4 is an honest unit, grossly over designed as is all Yamaha hi -end stuff of the era. Example: The front end preamp has 8 paralleled transistors just to linearize the characteristics of each transistor to be averaged out to be the perfect single transistor, and biased current mirrors for incredibly tight bias and thermal tracking, heck the regulated +/- 30v power supply alone has more components, and transistors in it than many preamps of the era and today. Today it's all chips (IC's).
A classically great preamp. Get one if you can!

rating
Reviewed Jul 17th, 2017 by plattenladen

Excellent Pre-amp with a plethora of functions, now long absent from pre-amplifiers like:
Dual switchable pre-outputs...
Semi parametric EQ that can be entirely bypassed...
3 (!) Phono inputs including a very good MC input...
Hard to find in a good condition, especially cosmetically.
Together with an M-4 (or M-2) Yamaha power amp a very good combo that sounds great for the money, even with Horn Speakers.

 

Comments

re: C-4

Classic piece of Yamaha gear, especially for the vinyl lover. I bought mine in 2009 from a guy in Arizona and had it shipped to me in PA. In 2011, I sent it to an excellent tech in Iowa who specializes in Yamaha gear. He did a total recap and reflowed the solder connections, among other things. I've used it in my main system since I bought it, except for the 3 weeks when it was receiving the "spa treatment". This pre will probably outlast me. I'll never sell it. I also have a good friend who bought one of these and sent it to the same tech in Iowa for a recap. He feels the same way as I do about his C-4.

I'm using two turntables, one with a MM cart and the other with a MC. This pre also has cartridge loading capability. The phono stage is outstanding. I would connect a third turntable but I don't have any room close enough, so it's in another system. I use one of the outputs to a power amp and the other to my subs. The output on-off switches are very handy if I want to turn the subs off, or the speakers when dialing in the subs.

Yamaha C-6 Pre-amp

Does anyone have a comparison between this C-4 and the C-6. A fellow employee has a Yamaha C-6 which he offered to me once he locates it in storage. He said there was a manual with it so I have an idea what to do with that since there is no C-6 manual on here.

re: Yamaha C-6 Pre-amp

Hello,

I've owned the Yamaha C-6, it's a really solid preamp. Great sonically. Different features and front panel layout to other earlier models, (C-1, C2a, C-4) but still and outstanding preamp in the industry.
I would be happy to own another one.
Great unit if you like the aesthetic layout and features... Can't go wrong.

Vannin

I always have mine bought in

I always have mine bought in 1978, it is in perfect condition, packed in Cellophane since many years ...
Thanks a lot for sharing !

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