Description
The McIntosh MC257 7-Channel Power Amplifier is designed to deliver scale, clarity and control at the heart of high-end home cinema systems. Combining high output power with silent operation and refined system flexibility, the MC257 provides the performance foundation required for immersive, reference-grade surround sound.
A defining feature is the TripleView™ Power Output Meter, which independently displays real-time power delivery for the front left, centre and right channels within a single, wide meter window. This streamlined design preserves the character of traditional McIntosh mechanical meters while offering a cleaner, more modern presentation. The iconic blue illumination can be switched off for dedicated cinema rooms where visual focus on the screen is essential.
Performance improvements are substantial. When driving the front three channels, output power increases to 250 watts per channel, ensuring maximum impact where the majority of a film’s soundtrack resides. With all seven channels in use, the MC257 delivers a consistent 200 watts per channel. Thanks to Dynamic Power Manager® (DPM) technology, full rated output is delivered into both 4-ohm and 8-ohm speakers, regardless of channel configuration.
Filter capacity has been increased by 20 percent, resulting in a dramatic 94 percent increase in dynamic headroom, rising from 1.7dB to 3.3dB. This allows the amplifier to handle sudden dynamic peaks with ease while improving low-frequency authority and control, both critical in modern cinema soundtracks.
Thermal and acoustic performance are equally considered. The MC257 uses five McIntosh Monogrammed Heatsinks™ connected to high-current output transistors, eliminating the need for cooling fans and ensuring silent operation. A specially wound toroidal isolation power transformer further reduces noise and interference.
System integration is straightforward and flexible. Both balanced and unbalanced inputs are provided for compatibility with a wide range of home cinema processors. Power Guard® actively prevents clipping and potential speaker damage, while Sentry Monitor™ offers fuse-less short-circuit protection by disengaging the output stage if current exceeds safe limits, automatically restoring operation when conditions normalise. An integrated power management system shuts the amplifier down after prolonged inactivity.
The MC257 can be deployed in multiple system configurations. It can power a complete 7-channel home theatre, be paired with additional McIntosh amplifiers such as the MI128 or MI254 for expanded Dolby Atmos, DTS:X or Auro-3D systems, or operate in a 5-channel configuration while powering a second audio zone.
Finished in classic McIntosh style, the MC257 features a polished stainless steel chassis, black glass front panel, TripleView meter, illuminated logo and aluminium end caps, ensuring visual cohesion with other McIntosh electronics.
At Hidden Home Technology, we specify the McIntosh MC257 for clients seeking powerful, quiet and flexible multi-channel amplification for premium home cinema environments. Proper system design and installation are essential to realise its full performance potential.
Click here to see the compact alternative – McIntosh MC255 5-Channel Power Amplifier
Click here for the McIntosh website – McIntosh MC257 7-Channel Power Amplifier
