Marantz Model 1070 (1975)
A solid-state stereo console amplifier with independent preamp and power amp sections, sold in Japan for ¥69,900.
Overview
The Marantz Model 1070 is a stereo console amplifier manufactured in the mid-1970s. Built with a traditional inverting Darlington circuit, it features a fully integrated design that allows the pre-amplifier and power amplifier sections to operate independently. It supports phono, mic, and auxiliary inputs, with tone controls including a midrange adjustment and selectable high and low filters. The unit includes a speaker matrix circuit for 4-channel operation and an output transistor protection system using Pulse Energy Protection (PEP).
Specifications
| Rated output | 40W + 40W (8 Ω, 20 Hz to 20 kHz, both channel drive) |
| Frequency characteristic | 20 Hz to 20 kHz ± 1 dB |
| Total harmonic distortion factor | 0.3% or Less (20 Hz to 20 kHz) |
| Cross modulation distortion factor | 0.3% or Less (20 Hz to 20 kHz) |
| Damping factor | 40 or More (8 Ω Load) |
| Gain | Phono - Preout:55dB, Phono - Recout:40dB, Highlevel - Preout:15dB |
| Input impedance | Phono, Mic : 47k Ω, High level : 100k Ω |
| Input sensitivity | Phono:1.8mV, Aux:180mV |
| Phono input equivalent noise | 1.5 μ V or Less (Input Conversion Value) |
| Filter | High:10kHz, Low:50Hz |
| Power supply voltage | 100 VAC, 50Hz/60Hz |
| Power consumption | 190W |
| External dimensions | Width 360x Height 120x Depth 280 mm |
| Weight | 8.4kg |
Design
The amplifier uses a traditional inverting Darlington circuit and includes a tone control section with midrange adjustment. It is equipped with a speaker matrix circuit enabling 4-channel speaker operation and features an output transistor protection circuit using PEP (Pulse Energy Protection). The pre-amplifier and power amplifier sections can be used independently, allowing for flexible system integration.
Market
The Marantz Model 1070 was sold with optional accessories, including the walnut cabinet WC-20 priced at ¥5,900 and the rack mount adapter RA-10 priced at ¥4,900.
eBay Listings
As an eBay Partner, we earn from qualifying purchases. This helps support our independent vintage technology research.