Harman Kardon - PM655 Vxi High Current Solid state main amplifier

Vintage High-End Integrated Amplifier – Harman Kardon PM655 Vxi High Current Amplifier (Late 1980s)

Offered here is the highly respected Harman Kardon PM655 Vxi, a vintage high-end integrated amplifier from the late 1980s, widely admired for its powerful High Voltage / High Current amplifier design, musical sound character, and understated audiophile engineering. Part of Harman Kardon’s renowned “Vxi” series, the PM655 Vxi was engineered to deliver serious hi-fi performance with excellent speaker control, low distortion, and impressive dynamic capability.

This amplifier became especially popular among audio enthusiasts, including audiophiles, due to its ability to drive demanding loudspeakers with authority while maintaining the warm, detailed, and natural analogue sound signature for which Harman Kardon became famous.

Features & Specifications:
Model: Harman Kardon PM655 Vxi
Year of Manufacture: 1988
Origin: Harman Kardon
Type: High-end stereo integrated amplifier

Amplifier Section:
Power Output: Approx. 2 × 50 watts into 8 Ω
High Voltage / High Current amplifier architecture
High-current capability for improved dynamic speaker control
Wide dynamic headroom allows a strong transient response
Low-distortion audio circuitry designed for high-fidelity music reproduction

Audio Design & Technology:
• High Voltage / High Current integrated amplifier design
• Discrete component amplifier construction
• Designed for stable performance with difficult speaker loads
• Warm yet detailed analogue sound presentation
• MM / MC phono cartridge compatibility for vinyl enthusiasts
• Pre-out / Main-in separation switch for system flexibility

Advanced Features:
• Phase-correct loudness circuit
• Subsonic filter
• High-cut filter
• Tone defeat mode for purer signal path
• Adjustable bass and treble turnover frequencies
• Dual speaker selection system

Connectivity:
• Phono input for MM and MC turntables
• CD input
• Tuner input
• AUX / A-V input
• Tape monitor loop
• Headphone output
• Dual speaker outputs

Construction & Design:
• Elegant champagne/silver Harman Kardon styling
• Solid metal chassis construction
• Large precision volume control
• Clean minimalist front-panel layout
• Heavy internal transformer and power supply section
• Classic late-1980s high-end industrial design

Historical Background:
During the 1980s, Harman Kardon developed a strong reputation for producing amplifiers with conservative power ratings but excellent real-world current delivery. The PM655 Vxi reflects this philosophy perfectly — rather than focusing purely on headline wattage figures, Harman Kardon engineered amplifiers capable of maintaining control and musicality even with more demanding loudspeakers.

The “Vxi” generation became particularly respected among audiophiles for combining practical usability with serious hi-fi performance at a competitive price point.

Condition:
This Harman Kardon PM655 Vxi is presented in excellent vintage condition with signs of use consistent with age. The amplifier retains its elegant original appearance and classic Harman Kardon styling. Due to the age of vintage hi-fi electronics, servicing or maintenance by a qualified technician may be beneficial for optimal long-term reliability and listening pleasure.

Collectable & Practical Value:
The PM655 Vxi remains a highly desirable amplifier among vintage audio enthusiasts thanks to its musical sound quality, strong current capability, and robust engineering. Harman Kardon amplifiers from this era are increasingly appreciated for their ability to deliver powerful and refined stereo reproduction without unnecessary complexity.

Its High Voltage / High Current design, MM/MC phono capability, and sophisticated analogue control section make it especially attractive for vinyl lovers and collectors seeking a true late-1980s audiophile amplifier.

Proudly presented by SpaceTime Engineering — watch it in action on our YouTube channel:
https://www.youtube.com/@spacetimeengineering

Shipping:
Worldwide tracked and insured shipping according to Catawiki guidelines, the weight is approxmate including packaging

Seller’s Story
We are a highly specialised company based in the Netherlands, offering high-quality audio and electronic equipment throughout Europe — generally through Catawiki.