McIntosh MA6900 (2001–2012)
The MA6900 was McIntosh's flagship integrated amplifier when it arrived in 2001, replacing the MA6800 and MA6850. It stayed in production long enough to become one of the company's most widely owned integrateds. Audio Classics lists the run as 2001 - 2012, though other sources say it remained in production "more than 15 years" from its 2001 debut. The exact end date is approximate. It's a solid-state two-channel design rated at 200 watts per channel into 2, 4, or 8 ohms, with independent speaker terminals for each impedance and McIntosh's signature output autoformers matching the amplifier to whatever load it sees. Original Japanese pricing was ¥680,000 around 2001.
The feature set is the big draw. A five-band equalizer (50 Hz, 150 Hz, 500 Hz, 1.5 kHz, 10 kHz, ±12 dB) sits on the front panel, and when each knob is centered the circuit is bypassed entirely, out of the signal path. There's a phono stage for moving-magnet cartridges and a motor-driven volume control with laser-trimmed resistors for accurate channel tracking. Logic-operated electromagnetic switches sit on all input, output, and data ports - glass-enclosed relays with gold, rhodium, and ruthenium-plated contacts in an inert gas fill. Protection comes from McIntosh's Power Guard waveform comparator and Sentry Monitor output-stage monitoring, plus DC, thermal, turn-on delay, and in-rush protection. The chassis is stainless steel, the input/output jacks are gold-plated, and the front panel carries the familiar illuminated blue output meter.
Specs are well documented for the standard MA6900. THD is 0.005% or less (20 Hz - 20 kHz, 250 mW to 150W, both channels). Frequency response is 20 Hz - 20 kHz +0/-0.5 dB, and damping factor is 100 or more at 8 ohms. IHF dynamic headroom is 2.4 dB. Signal-to-noise ratios on the IHF-A network are 90 dB (phono), 100 dB (high level), and 110 dB (power amp). Dimensions are 444.5 × 181.0 × 419.1 mm, and weight is 33.8 kg.
A limited-edition variant, the MA6900G, was released in 2007 to commemorate the establishment of McIntosh Japan. Only 150 units were made, with a gold stainless steel chassis and side panels, serial numbers engraved on the top cover, and an autograph from McIntosh president Charles Lindor on each unit. It sold for ¥945,000 including tax. Its specs differ slightly from the standard model: 34 kg, larger maximum dimensions (445 × 198 × 476 mm), 4.4A power consumption versus 4.0A, and a remote control included.
The documentation has gaps. There's no professional review literature in the record. The enthusiast commentary that survives is forum-level ("solid, heavy unit and well built," one owner running B&W 703s on the 4-ohm taps) and a HomeTechnologyReview line calling it "an off-roader amongst grocery carts." No independent THD verification exists, no confirmed production numbers, and no documented common failure points beyond one owner's note that the original incandescent meter lamps had been replaced with LEDs. Original remotes appear frequently missing on the used market, where aftermarket replacements are sold cheaply. Current pricing outside the Russian marketplace is thin in the sources. Avito listings in Moscow have shown the MA6900 in the 400,000-450,000 ₽ range, sometimes bundled with an MR87 tuner.
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