Stereo Integrated Amplifier (1978-1979)
The Pioneer SA-606 is a stereo integrated amplifier giving a continuous power output of 40 watts per channel.
The unit has discrete power supply sections for the class A and class B sections, and a current-mirror loaded differential amplifier with constant current loaded Darlington connected all-stage direct-coupled OCL output.
Other features include outputs for two sets of speakers, click stop tone controls, loudness contour, separate watts meters with LED peak indicators for each channel, and advanced electronic protection.
Power output: 40 watts per channel into 8Ω (stereo)
Frequency response: 20Hz to 40kHz
Total harmonic distortion: 0.05%
Damping factor: 30
Input sensitivity: 2.5mV (MM), 150mV (line)
Signal to noise ratio: 78dB (MM), 95dB (line)
Output: 150mV (line)
Semiconductors: 2 x IC, 25 x transistors, 27 x diodes
Dimensions: 450 x 148 x 263mm
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As a collector of amplifiers from this era for sometime, this amplifier holds a a great attraction for me cosmetically especially with moving coil power displays, and even more so as the bulbs blew, and I put a bright blue L.E.Ds in as replacements, its given a fresh modern but still a retro era look.
As with most amplifiers from this era, the sound is full bodied, and quite punchy, which can interfere with sonic sound quality.
Switching off the loudness cuts bass, so helps but you can leave the loudness switched on, and turn the bass down to your taste.
On playing modern dance music via cd from the aux, tuner inputs the bass can cause the amplifier to clip, you have two red L.E.Ds above the coil displays to give a warning, these will flicker if its about to clip.
Overall a great amplifier to own and look at, and sounds excellent with a variety of different speakers, and cd players. You can even upgrade the power lead as the amplifier has a 3 pin plug on the back, as most amplifiers have a hard wired lead coming out.
TOP TIP:clean the plug pins on the mains lead of oxidation with metal polish, helps with sound quality.