Marantz Model 140 Stereo Power Amplifier

Name: Marantz MODEL 140
Brand: Marantz

A high-fidelity stereo power amplifier built by Marantz Company, a subsidiary of Superscope, featuring robust output and precision metering

Overview

The Marantz Model 140 is a stereo power amplifier designed for high-fidelity audio systems. Manufactured by Marantz Company, a subsidiary of Superscope, it delivers 80W per channel into 8Ω and 100W per channel into 4Ω with low distortion and a flat frequency response from 20 Hz to 20 kHz. It features VU meters and independent left/right peak indicators, with red lighting to signal current limiting during clipping or low-impedance conditions. The amplifier uses Fairchild P D200W output transistors and is part of the "Classic Models Reference" list.

Specifications

Power output	100W + 100W (4 Ω) & 80W + 80W (8 Ω)
Total harmonic distortion factor	0.1% or Less (20 Hz to 20 kHz)
Cross modulation distortion factor	0.15% or Less (20 Hz to 20 kHz)
Frequency characteristic	20 Hz to 20 kHz ± 0.1 dB
Input Sensitivity / Impedance	1.5V/30k Ω
Damping factor	45 or More (8 Ω)
Power	100 VAC, 50Hz/60Hz
Power consumption	250W
External dimensions	Width 360x Height 120x Depth 273 mm (Width and height are panel size)
Weight	11kg
Original price	¥ 89,000 (around 1976)

Design

The amplifier uses Fairchild P D200W output transistors and includes VU meters with independent left/right peak indicators. A red warning light activates when the current limiting circuit engages due to instantaneous clipping or abnormally low impedance loads.

Product Family

The Model 140 is listed in the "Classic Models Reference" series. Optional accessories include the walnut cabinet WC-20 (¥ 5,900) and rack mount adapter RA-10 (¥ 4,900), both sold separately.

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