ABOUT THIS UNIT

Offered here is a vintage Marantz 4220 AM/FM Stereo 2 + Quadradial 4 receiver that has been professionally serviced and restored by HQaudios.

The Marantz 4220 is a true 1970s quadraphonic receiver capable of operating as either a conventional 2-channel stereo receiver or a 4-channel quadraphonic receiver.

In 2-channel stereo operation, the receiver delivers approximately 20 watts per channel into 8 ohms. In 4-channel operation, it delivers approximately 8 watts per channel into 8 ohms.

This unit includes the WC-10 style wood cabinet shown in the photographs, giving the receiver the classic finished appearance associated with vintage Marantz components.

The receiver shown in the photographs is the actual unit for sale.

RESTORATION & SERVICE WORK PERFORMED

Electronic & Functional Service

• Receiver opened for internal inspection and servicing.
• Internal chassis and accessible electronic areas cleaned.
• Power supply operation checked for proper function.
• Front and rear amplifier channels checked for proper operation.
• 2-channel stereo operating mode tested.
• 4-channel quadraphonic operating mode tested.
• Front and rear channel operation verified.
• Volume, balance and tone-control functions checked and serviced.
• Selector switches and operating controls cleaned and exercised.
• AM/FM tuner functions checked.
• FM stereo operation checked.
• Tuning mechanism and dial operation checked.
• Phono input checked.
• Auxiliary and tape-related signal paths checked.
• Speaker outputs checked.
• Headphone output checked.
• Front-panel lamps and indicator functions checked.
• Rear-panel connections inspected and cleaned as required.
• Receiver function-tested after servicing.
• Extended listening test completed before final QC.

Cosmetic Restoration & Detailing

• Exterior surfaces carefully cleaned and detailed.
• Aluminum faceplate cleaned while preserving the original lettering and markings.
• Control knobs cleaned and polished.
• Dial glass and visible display surfaces cleaned.
• Rear panel cleaned and detailed.
• WC-10 style wood cabinet cleaned and cosmetically restored.
• Complete unit given a final presentation detailing before photography.

FINAL QC & TESTING

• Power-on and startup operation verified.
• 2-channel stereo playback tested.
• 4-channel quadraphonic playback tested.
• All amplifier channels checked for output.
• AM and FM reception functions checked.
• FM stereo function checked.
• Phono input tested.
• Auxiliary and tape functions checked.
• Speaker outputs checked.
• Headphone output checked.
• Front-panel controls and switches exercised through their operating range.
• Lighting and indicators checked.
• Listening test performed through speakers.
• Final cosmetic QC completed before photography and packing.

The receiver is operating properly at the time of listing and is ready for normal use.

KEY FEATURES

• Classic 1970s Marantz receiver design.
• 2-channel stereo and 4-channel quadraphonic operation.
• Approximately 20 watts per channel into 8 ohms in stereo mode.
• Approximately 8 watts per channel into 8 ohms in 4-channel mode.
• AM/FM analog tuner.
• FM stereo reception.
• Phono input for turntable use.
• Auxiliary and tape connectivity.
• Multiple speaker outputs.
• Front-panel headphone connection.
• Classic Marantz illuminated dial presentation.
• WC-10 style wood cabinet included.

FACTORY TECHNICAL SPECIFICATIONS

COSMETIC CONDITION

This receiver presents very well for a genuine vintage component of its age.

The faceplate, knobs, dial area, cabinet and rear panel have been cleaned and detailed as part of the restoration process.

Because this is vintage equipment, minor age-related marks or small cosmetic imperfections may remain.

Please review all product photographs carefully. The photographs are part of the description and show the actual cosmetic condition of the unit being offered.

WHAT IS INCLUDED

• 1 × Marantz 4220 Receiver.
• 1 × WC-10 style wood cabinet shown in the photographs.
• Only the items shown and specifically described are included.

WHY PROFESSIONALLY RESTORED VINTAGE AUDIO?

Vintage audio equipment can be more than 40 or 50 years old. A receiver that simply powers on is not necessarily ready for reliable everyday use.

Our restoration process is designed to identify operating issues, service age-related controls and connections, verify major functions and complete extended testing before the unit is offered for sale.

The goal is to provide a properly prepared vintage component rather than an untested or unknown-condition unit.

PROFESSIONAL PACKAGING

Vintage receivers require substantially more protection than modern lightweight electronics.

This unit will be professionally packed with protective wrapping, dense cushioning, corner protection and appropriate carton protection to help protect the faceplate, knobs, wood cabinet and internal components during transportation.

A final QC inspection will be completed before shipment.

1-YEAR WARRANTY

This professionally refurbished Marantz 4220 is backed by our 1-year warranty.

If you have any setup or operating questions after receiving the receiver, please contact us. Many vintage-audio questions can be resolved quickly with proper setup guidance.

ABOUT HQAUDIOS

HQaudios specializes in professionally refurbished vintage audio equipment for the U.S. market.

Our restoration process focuses on functional reliability, careful cosmetic presentation, detailed testing, professional packaging and after-sale support.

Each refurbished component passes through multiple stages of inspection and QC before shipment.