McIntosh MC30 Monoblock Tube Power Amplifier – The Golden Age of American Hi-Fi For sale is a well loved McIntosh MC30 — one of the most legendary vacuum tube monoblock amplifiers ever built. Manufactured by McIntosh Laboratory Inc. in Binghamton, New York, between 1954 and 1962, the MC30 represents the pinnacle of mid-century American audio engineering. Renowned for its lush midrange, holographic imaging, and silky smooth high frequencies, the MC30 has become a favorite among audiophiles, collectors, and recording engineers seeking that unmistakable vintage McIntosh sound. Technical Specifications: Model: McIntosh MC30 Monophonic Power Amplifier Power Output: 30 watts RMS continuous Circuit Type: Class AB1 push-pull, cathode-biased Output Tubes: 2 × 6L6GC (or 1614) Driver Tubes: 12AX7, 12AU7, 12BH7, 12AZ7 Rectifier: 5U4G Frequency Response: 20Hz – 20kHz ±0.5dB Total Harmonic Distortion: < 0.5% at rated output Input Sensitivity: 0.5V for full output Input Impedance: 250kΩ Output Impedance: 4, 8, 16 Ohms (multi-tap) Era of Manufacture: 1954–1962 Country of Origin: USA Condition: This example has been checked and the input power component has been upgraded from 110v to 240v for EU standards. The capacitors and diodes have been checked or replaced where needed to ensure long-term reliability while preserving original McIntosh transformers and character. Chrome chassis presents beautifully, and all tubes are tested and matched. The MC30 delivers that unmistakable warm, musical McIntosh tone — rich in detail, with a powerful, three-dimensional presence that modern amplifiers rarely replicate. A truly collectible piece of hi-fi history, perfect for pairing with vintage preamps or high-efficiency loudspeakers. Please see the pictures of the insides for an idea of what work was done. Please note that we will gift you the tubes as we are not responsible for damages in transit. Please see that this is a vintage item. It requires as much love and patience. If you dont have these 2 ingredients please dont buy this item. I have loved this mc30 pre and post rebuild. Enjoy!