McIntosh MC303 3-Channel Solid State Amplifier

Description

Overview

The MC303 is a three-channel power amplifier from McIntosh, designed to drive the three front channels of a high-end home cinema — front left, centre and front right — where most of a film’s dialogue, score and on-screen effects live. It brings McIntosh’s amplifier engineering to the part of the system that does the most work.

Design & build

The MC303 is a substantial single component: 17.75 × 12.375 × 22 inches and 155lb, on a polished stainless-steel chassis with a black-glass front panel. It carries McIntosh’s illuminated blue output meters, with a meter-light switch, so all three channels can be monitored at a glance within an equipment rack.

Sound & performance

Each of the three channels delivers 300 watts into 2, 4 or 8 ohms, giving the clarity, dynamic impact and control needed to reproduce a soundtrack with realism and scale. Total harmonic distortion is 0.005% and signal-to-noise ratio is 112dB below rated output. The high-current design keeps dialogue intelligible and tonal balance consistent across all three front channels.

Key features

The amplifier’s output is delivered through McIntosh’s Autoformer, so its full 300 watts per channel is available to 2, 4 or 8-ohm loudspeakers alike. Power Guard clipping protection and the fuse-less Sentry Monitor safeguard the output stage and connected speakers. Balanced XLR and unbalanced inputs are provided, and remote power control allows clean integration with a processor or control system.

Technology

The Autoformer output transformer is the key to the MC303’s load independence: rather than losing power into lower impedances, it presents an ideal load so each channel delivers its rated output regardless of the speaker connected. Power Guard monitors the waveform to prevent audible clipping under demanding cinema peaks, while Sentry Monitor keeps the output devices within safe limits without fuses in the signal path.

Specifications

Type: three-channel solid-state power amplifier. Output: 300W per channel into 2, 4 or 8 ohms. THD: 0.005%. Signal-to-noise: 112dB below rated output. Frequency response: +0, −0.25dB 20Hz–20kHz; +0, −3dB 10Hz–100kHz. Damping factor: greater than 40. Output: Autoformer. Protection: Power Guard, Sentry Monitor. Inputs: balanced and unbalanced. Dimensions: 17.75 × 12.375 × 22in. Weight: 155lb.

Who it’s for

The MC303 suits the enthusiast building a reference home cinema who wants McIntosh power and load independence across the three front channels, with the option to add further McIntosh amplification for surround and height channels. It is engineered for the most demanding front soundstage.

Why buy from Hidden Home Technology

The front three channels set the character of a cinema, and they reward proper amplifier matching and calibration. We design and install dedicated cinema and media rooms across the South, integrating amplification with speakers, processing and control. Explore our power amplifiers or speak to our team about your room.