Marantz 4230 Stereo and Quadradial Receiver - Japan, 1975

Marantz 4230 – Classic Quadraphonic Receiver (1974–1976)

The Marantz 4230 is a legendary quadraphonic receiver produced in the mid-1970s, representing the golden era of Marantz audio engineering. Designed for both 2-channel stereo and 4-channel quadraphonic playback, this receiver combines warm analog sound with the timeless elegance of brushed aluminum and blue dial illumination that made Marantz famous.

✨ Key Features & Highlights

🔸 Power Output: 30 watts per channel (×4) into 8 ohm in quad mode, or 60 W per channel in stereo mode (bridged) — delivering clean, dynamic sound with plenty of headroom.
🔸 Quadraphonic Capability: Supports both 2-channel stereo and 4-channel playback, with built-in matrix decoder for SQ quadraphonic records.
🔸 Classic Marantz Design: Silver brushed-aluminum faceplate, blue-green dial lighting, gyro-tuning flywheel, and solid toggle switches — a hallmark of 1970s Marantz aesthetics.
🔸 Versatile Connectivity: Multiple line inputs, two phono stages, two tape loops, 4-channel pre-out/main-in jacks, and speaker outputs for multiple zones.
🔸 FM/AM Tuner Section: High-sensitivity tuner with Marantz’s famous smooth gyro wheel for precise tuning.
🔸 Mode Selector: Allows switching between 2CH / 4CH / Discrete, as well as mono and stereo blending options.

📐 Technical Specifications

Continuous Power: 30 W × 4 ch @ 8 ohm (20 Hz–20 kHz, min 0.5% THD)
Stereo Mode: 60 W × 2 ch (bridged)
Frequency Response: 20 Hz – 20 kHz (±1 dB)
Total Harmonic Distortion: ≤ 0.5%
Dimensions: approx. 450 × 150 × 370 mm
Weight: approx. 13 kg