Marantz - Hi-Fi Amplifiers
Marantz PM420
40W Integrated Amplifier with 0.05% THD
Free UK delivery by 23 - 25 Jul
THERE IS ONLY ONE.
ABOUT THIS PRODUCT
Marantz PM420 - Hi-Fi Amplifier - Excellent
Why This One
- Excellent condition - light signs of use, no obvious issues
- Fully tested - all applicable functions verified working
- 40W per channel, 0.05% THD - clean, capable 1980s Marantz engineering.
- A cost-effective entry into classic Japanese integrated amplifier performance.
Condition: Excellent
This Marantz PM420 is an excellent-condition Hi-Fi amplifier. It has passed our 14-point functional test, with 2 item(s) not applicable to this unit. Please review all photos carefully, as they provide an accurate representation of the cosmetic condition of the product.
What's Included
- Marantz PM420
- No additional accessories included
About This Model
The Marantz PM420 is a stereo integrated amplifier from 1982, delivering 40 watts per channel into 8Ω with a minimum speaker load impedance of 4Ω. It features a built-in MM phono stage alongside line-level inputs, making it a versatile single-box solution for both turntable and source-based systems. Total harmonic distortion is rated at just 0.05%, with a frequency response spanning 10Hz to 30kHz and a signal-to-noise ratio of 90dB on line inputs - figures that reflect Marantz's commitment to clean, accurate amplification in this era. A damping factor of 50 provides solid control over speaker drivers, contributing to the composed, well-defined sound character these late-Marantz Japanese-era integrateds are known for.
A great opportunity to own a Marantz PM420 at this price point.
General
| Brand | Marantz |
| Model | Marantz PM420 - Hi-Fi Amplifier - Excellent |
| Category | Hi-Fi Amplifiers |
| Condition | Excellent |
Condition
This Marantz PM420 - Hi-Fi Amplifier - Excellent has been inspected and set up by our workshop. Every item is a single, one-off piece, photographed as it is so you know exactly what you are buying.
Condition guideOur inspection process
- 01
Workshop inspection
Checked by a specialist, not just a technician. Body, hardware and cosmetics visually assessed for wear, damage and authenticity.
- 02
Function tested
Controls, connections and electronics tested at the bench to confirm everything works as it should.
- 03
Prepared for use
Cleaned and set up where needed so it arrives ready to use straight out of the box.
- 04
Photographed & documented
Every angle, mark and detail captured in high resolution so you know exactly what you are buying.
- 05
Double-boxed dispatch
Re-checked before packing, then carefully packed and sent tracked and signed-for.

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After you buy
01
Order placed
Payment confirmed instantly. You'll get an email receipt and tracking link to follow.
02
Workshop pack
We re-check the inspection, photograph the packing, and carefully box for safe transit.
03
Tracked dispatch
Signed-for courier across the UK. Most orders arrive within 2 working days.
04
30-day returns
Not the one for you? Send it back within 30 days for a full refund.
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Marantz PM420 - Hi-Fi Amplifier - Excellent

















