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Onkyo P-306RS

Super Servo Stereo Preamplifier (1983)

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Onkyo P-306RS


Frequency response: 0.8Hz to 170kHz

Total harmonic distortion: 0.0015%

Input sensitivity: 0.13mV (MC), 2.5mV (MM), 150mV (line)

Signal to noise ratio: 83dB (MC), 92dB (MM), 103dB (line)

Output: 1V (Pre out)

Semiconductors: 48 x transistors, 37 x diodes, 6 x FET, 4 x IC

Dimensions: 480 x 100 x 403mm

Weight: 10.5kg




I'm writing this about a unit that is close to his 40th birthday.
Impecable construction, all differential amplifiers are built with double transistors in one capsule, minimizing heat effects, different sections are separated by sealed plastic blocks, power supply could have had larger capacitors but considering the null hum in the output it looks like they are properly designed.

After a replacing two burn lamps, a quick clean and a little touch with Deoxit, the unit is working perfect. I use it as a moving coil cartridge pre amplifier, work that performs impeccably. Very clean and transparent sound. I'm using it as replacement of a Yamaha C-65 that was very good but not as clear as this one.

This P-306RS has some nice details that make it a very desirable unit, it has a system that provide you with luminous feedback of tones settings. It has also a delayed start similar to large amplifiers. Turntables section is a sophisticated one too.

If you check the specs will notice that this is an excellent unit for the price you can get it. Much better than 2017 units.

Last but not least I dropped it from 1 meter high when cleaning it and the unit did not present any malfunction.



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