McIntosh MC255
5-channel power amplifier from McIntosh, designed to equip home cinema installations with demanding dynamics.
Description
The McIntosh MC255 is a five-channel power amplifier, designed to power a complete home cinema configuration from a single unit. It thus combines the amplification needed for the front, centre and surround channels within a single chassis, rather than multiplying mono or stereo units.
Its design favours the combination of power and versatility, two qualities sought after in high-performance home cinema systems, which must reproduce dialogue as well as the most dynamic action scenes.
This type of unit is aimed at home cinema enthusiasts wishing to simplify their installation by entrusting the amplification of several channels to a single unit, while maintaining a high level of performance, particularly for reproducing the most demanding passages in terms of dynamics.
Technical specifications
| Type | Solid-state amplifier |
| Configuration | Push-Pull Complementary |
| Frequency response | +0, -0.25 dB from 20 Hz to 20 kHz |
| Bandwidth | +0, -3 dB from 10 Hz to 100 kHz |
| Power | 250 W per channel (3 front channels) or 200 W per channel (5 channels) |
| Signal to noise ratio | 108 dB at rated power |
| Total harmonic distortion | 0.005 % |
| Damping factor | >70 at 4 ohms and >140 at 8 ohms |
| Inputs | 5 balanced inputs |
| Dimensions (H × W × D) | 239 × 445 × 533 mm |
| Weight | 40.6 kg |
What to check before buying used
On this five-channel unit, the power supply capacitors and protection relays deserve particular attention after several years of service, as does the correct triggering of the five channels at switch-on. The input connectors and speaker terminals, numerous on a five-channel chassis, must remain free of oxidation to avoid a dead channel or contact noise. Internal cooling is also worth checking, as thermal dissipation is more heavily taxed than on a standard stereo unit.
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