McIntosh MC30 ()
At 30.5 pounds and 30 watts, it’s a monoblock that punches far above its paper specs.
Overview
The McIntosh MC30 isn’t just an amplifier—it’s a cornerstone. Though modest by modern standards, its 30 watts into 8Ω delivered clean, controlled power that stood out in an era when .
While the MC30 shares lineage with other early McIntosh tube monoblocks like the MC60, it occupies a unique niche—compact enough for domestic use yet robust enough for critical applications. Its frequency response of 20Hz to 30kHz (±0.1dB at full power) was exceptional for the time, and its total harmonic distortion of less than 1% across the audible band set a new benchmark for transparency. With a damping factor of 12, it offered respectable control over bass frequencies, a trait that contributed to its reputation for tight, articulate low end. The amplifier operates on standard household voltage (117–125V, 50/60Hz), making it adaptable to a range of installations without the need for external transformers.
Specifications
| Manufacturer | McIntosh Laboratory |
| Model | MC30 |
| Product Type | Monophonic Power Amplifier |
| Power Output | 30 watts into 8Ω (mono) |
| Frequency Response | 20Hz to 30kHz |
| Total Harmonic Distortion | Less than 1% at 30 watts output or less, 20 to 20,000 cycles |
| Damping Factor | 12 |
| Power Supply | 117 - 125 volts, 50/60 cycles |
| Dimensions | 13 x 8 x 8 inches |
| Weight | 30.5lbs |
Historical Context
The MC30 and MC60 tube amplifiers became legends in their own time, representing the peak of 1950s tube amplifier design. As part of McIntosh’s 1950s product line, the MC30 played a key role in establishing the company’s reputation for quality and innovation. It was engineered during a period when high-fidelity audio was transitioning from hobbyist experimentation to a serious consumer pursuit, and its combination of measured performance and build integrity made it a reference standard.
Collectibility & Value
The MC30 remains highly sought after by collectors, with original units regularly commanding prices between $4,000 and $5,500 depending on condition and restoration status. Originally priced at $153.50 per unit, its current market value reflects both its historical significance and enduring sonic reputation. Restorations often include replacement of the 5U4GB rectifier, 12BH7A, and 12AX7 tubes, along with cleaning of internal contacts to ensure optimal performance. Units with original chrome faceplates and decks in good condition are particularly prized, and fully serviced examples have been listed as high as $5,495. Despite its age, the MC30 continues to be celebrated as one of the most desirable monoblock tube amplifiers ever made.
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