McIntosh MR65A
The McIntosh MR65A is an FM/AM tuner. It follows McIntosh's usual approach to tuner design, which put clarity and reliability first.
Specifications
| Specification | Value |
| Tuning Range | 87.5-108 MHz (FM), 530-1710 kHz (AM) |
| Sensitivity | 1.8μV (FM), 50μV (AM) |
| Signal-to-Noise Ratio | 75dB (FM), 50dB (AM) |
| Total Harmonic Distortion | 0.3% (FM), 1.0% (AM) |
| Capture Ratio | 1.5dB |
| Selectivity | 70dB |
| Stereo Separation | 40dB |
| Output Level | 500mV |
| Dimensions | 17" × 5" × 12" |
| Weight | 18 lbs |
Historical Context
During the 1970s, FM broadcasting reached new levels of quality, and the MR65A was designed to pull the most out of broadcast signals. It became a reference for tuner performance in its price class.
The MR65A was in production from 1972-1982. It competed with other premium audio components of the era. Many units remain in service today.
Design Features
The MR65A uses RF circuitry, precision tuning mechanisms and multiplex decoding for stereo FM. The design aims for stable reception, low noise and accurate signal processing.
The MR65A has high-quality transformers, precision capacitors, and carefully selected transistors or tubes. The construction is aimed at both sound quality and long-term reliability, with attention to chassis rigidity, component layout and thermal management.
Related Models
Other models from the same brand and era are worth a look for building out a vintage audio system.
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