MCINTOSH MC 611

Price refers to the pair.

The MC611 Quad Balanced monoblock amplifier produces 600 Watts of power, enough to satisfy virtually any loudspeaker. A pair of MC611s can easily power an impressive home stereo system, or additional units can be added to enhance a home theater setup. Thanks to the exclusive Autoformer™ output technology, your speakers will receive the full 600 Watts regardless of whether they have 2, 4, or 8 Ohm impedance, allowing you to fully exploit the MC611's potential.

The MC611 has received numerous updates and improvements compared to the previous 600 Watt monoblock model. The main improvement is the doubling of the filter capacity, which has resulted in a 55% increase in dynamic headroom, from 1.8 dB to 2.8 dB. This doubling of filter capacity also helps improve performance in the low-end bass frequencies.

The front panel features new direct LED backlighting for improved appearance and color accuracy. On top, the audio Autoformer and power transformer are positioned just behind the front panel, but are now housed in new enclosures with glass tops. Behind them are two Monogrammed Heatsinks™ connected to advanced high-current output transistors, helping to eliminate thermal equilibrium lag. A diagram of the amplifier’s block layout has also been added to the panel between the heatsinks.

On the back, there are still three pairs of Solid Cinch™ binding posts (one pair for each speaker impedance), but more space has been added between each pair for easier cable management. Also included is our eco-friendly power management system, which automatically turns off the amplifier after a set period if no input signal is detected. Additional improvements include heavier gauge internal wiring and upgraded circuit components.

In addition to all these improvements, the MC611 is packed with other exclusive McIntosh technologies:

• Power Guard®, which monitors and adjusts the input signal at the speed of light and makes real-time adjustments to prevent harsh distortion and clipping that could damage the speakers
• Sentry Monitor™: a fuse-less short-circuit protection circuit that disengages the output stage before current exceeds safe levels and resets automatically when operating conditions return to normal
• Quad Balanced design, which eliminates virtually all noise and distortion that could have entered the audio signal
• Power Control, allowing for the sending of power on/off signals to other connected McIntosh components, facilitating system startup and shutdown
• Both balanced and unbalanced outputs for easy bi-amping or tri-amping of speakers; they can also be used to send the audio signal to a secondary system if your preamplifier doesn’t have enough outputs, or to connect a powered subwoofer.

The MC611 is housed in a beautiful polished stainless steel chassis and features McIntosh's timeless aesthetic with a black glass front panel, illuminated logo, control knobs, aluminum handles, and, of course, a large 8” (20.3 cm) fast-responding blue Watt meter.

Technical specifications:

• FTC Power Output: 600 W
• Power per Channel: 600 W into 2, 4, or 8 ohms
• Number of Channels: 1
• Total Harmonic Distortion: 0.005%
• Signal-to-Noise Ratio below rated output:
  Balanced: 124 dB
  Unbalanced: 120 dB
• Dynamic Headroom: 2.8 dB
• Damping Factor: >40 Wideband
• Rated Power Band: 20Hz to 20kHz
• Frequency Response:
  +0, -0.25 dB from 20Hz to 20kHz
  +0, -3.0 dB from 10Hz to 100kHz
• Unit Dimensions (W x H x D): 17-1/2" (44.45 cm) x 9-7/16" (23.97 cm) (including feet) x 22" (55.88 cm) (including front panel, handles, and cables)
• Unit Weight: 97.5 lbs (44.32 kg)