🎶✨ Marantz Model 4100 Quadraphonic Integrated Amplifier — Serviced/Cleaned, LED, 4CH/2CH Modes, Fully Tested/Working

Overview
Marantz Model 4100 quadraphonic integrated amplifier — serviced, cleaned, LED lighting installed, and fully tested working. A standout piece from the classic Marantz era, the 4100 gives you the flexibility to run true 4-channel quadraphonic playback or traditional 2-channel stereo, all in one substantial silver-face amplifier with unmistakable vintage presence.

This unit is a great fit for buyers building a quad setup, collectors looking for an iconic Marantz conversation piece, or anyone who wants a more unusual flagship-era vintage amplifier than the typical 2-channel receiver. The separate front/rear amplifier sections, flexible routing, and classic Marantz styling make the 4100 one of the more interesting and versatile pieces from the period.

Condition

• Excellent overall vintage presentation
• Faceplate, controls, and cabinet show honest age-appropriate wear only
• LED lighting installed for a clean, attractive display
• Please review all photos carefully for the best representation of cosmetic condition

Service & Testing

• Serviced and cleaned for maintenance / reliability
• Fully tested and confirmed working as designed
• Verified in both Stereo (2CH) and Quadraphonic (4CH) operation
• Inputs, signal routing, controls, switches, and speaker outputs checked for proper function

Unless explicitly stated, this unit is not represented as a full recap or full restoration.

Features

• True quadraphonic 4-channel capability plus conventional 2-channel stereo operation
• Separate Front and Rear Pre Out / Main In connections for flexible routing and system setup
• Multiple speaker output options for front and rear channels
• Classic Marantz build quality, styling, and collector appeal

Sound
Classic Marantz sound — warm, smooth, and full-bodied, with strong presence and an engaging vintage character. In stereo mode, it delivers the rich, musical presentation Marantz fans expect. In quad mode, it adds the fun and immersion that make vintage multi-channel gear so distinctive.

Included

• Marantz Model 4100 quadraphonic integrated amplifier
• No additional accessories unless shown in photos

Power

• 120V AC, 50/60Hz
• Power consumption: 400W
• Fuse: “Replace only with same type” 5A / 250V

Amplifier Mode (rear panel selector)

• 4 × 25W (Quad mode)
• 2 × 60W (Stereo mode)

Speaker Outputs

• Main Speakers: Front (R/L) + Rear (R/L) spring terminals
• Remote Speakers: Front (R/L) + Rear (R/L) spring terminals

Preamp / Main (jumpers)

• Front: Pre Out / Main In (L/R)
• Rear: Pre Out / Main In (L/R)

Tape / I/O

• Front Tape: Tape-2 Out / Tape-1
• Rear Tape: Tape-2 Out / Tape-1

Inputs

• Front Inputs: AUX / TUNER / PHONO (L/R)
• Rear Inputs: AUX (L/R)

Ground

• Chassis Ground terminal (as shown)

AC Convenience Outlets

• Unswitched: 200W max total
• Switched: 100W max total

Safety note: Specs listed are per rear-panel label/photos; buyer should confirm correct fuse type/value and appropriate speaker wiring/load before use.

Features

• True quadraphonic (4CH) + traditional stereo (2CH) flexibility
• Separate Front/Rear Pre Out/Main In with jumpers for advanced routing and troubleshooting
• Multiple speaker banks (Main + Remote) for system flexibility
• Classic Marantz build, styling, and collector appeal

Shipping & Packing

• Shipping includes reverb insurance, carrier cost, professional packing materials, and handling
• Packed to protect faceplate/controls (reinforced corners, foam blocking, double-boxing when appropriate)

Local Pickup (Cash & Carry)

Available in Newton, MA

Please Read

This is a vintage electronic component. It is fully tested and working at the time of listing, but because of age, vintage electronics may require future service, adjustment, or maintenance at any time. Please review all photos and the YouTube demo carefully, as they are part of the description.

BVA Issue Resolution / Reverb Protection Process: If your item arrives damaged or not as described, please message me promptly with clear photos and a video showing the issue. I am happy to work toward a fair resolution. In most cases, resolution will be handled in one of two ways: 1. Local repair reimbursement, if approved in advance or 2. Full return and refund. Please keep all original packing materials and the box, as they may be required for a claim or return. If a return is approved under Reverb Protection, Reverb issues the return shipping label after the claim is reviewed and approved. The seller does not generate the return label.

SEO / Tags

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