There are few vintage receivers as iconic as the Marantz 2270. That gorgeous blue dial light along with its ultra cool tuning flywheel and brushed aluminium faceplate make it a true piece of audio art. Its internal workings are just as impressive: a massive power transformer along with separate amplifier boards allow the 2270 to achieve a very conservative 70 watts per channel (into 8 ohms).
This particular example has been thoroughly inspected, serviced, and tested. We have had it hooked up and playing for nearly 2 weeks since completing the refurb, and can honestly say that we’ve never heard a 2270 sound this good. It runs very cool in temperature as well.
Here’s a brief list of work performed on this receiver:
- Filter capacitors replaced with Nichicon Gold Tune caps.
- All electrolytic capacitors in the power supply, amplifier boards, preamp/tone control board, and the phono preamplifier board have been replaced high quality Nichicon low-esr type capacitors.
- All tantalum capacitors in the amplifier boards, preamp/tone control board, and the phono preamplifier have been replaced.
- Failure prone transistors have been replaced with good quality modern devices.
- Protection relay was replaced with a new Omron MY4N.
- The variable resistors in the bias and DC offset circuit have been replaced with Bourns precision trim pots.
- Bias resistors and diodes have been replaced and moved to their respective heatsinks for better performance.
- All controls and switches have been cleaned and are free of noise.
- All bulbs have been replaced with long life LEDs (warm white).
- Vellum paper for dial display and tuning meters has been replaced.
- Power supply, bias, and DC offset have been properly adjusted.
- Unit was thoroughly cleaned inside and out.
- AM/FM have been aligned.
- Output transistors were replaced.