MC303

Solid State Amplifier

At 300 W per channel the new McIntosh MC303 Three Channel Power Amplifier with Autoformers is our most powerful multi-channel amplifier offering to date. This powerhouse is also the first ever multi-channel amplifier from McIntosh to include Autoformer coupled output stages. The McIntosh Autoformer, a premium technology found only on the best McIntosh designs, allows each channel of the MC303 to deliver maximum power into 2, 4, or 8 Ω loads resulting in the lowest noise and distortion performance possible. With available peak power of 1200 W per channel, the MC303 is ready to drive the finest loudspeakers to sound their very best.

Premium cosmetics featuring a ½” thick glass faceplate, custom machined and anodized aluminum handles, and a mirror polished stainless steel chassis are standard equipment on the MC303. Power Guard, a McIntosh circuit innovation, maximizes sound quality at high power levels while our Sentry Monitor feature provides continuous short circuit protection of the amplifier and connected loudspeakers. A triple bank of Peak Reading W Meters provides instant recognition of power output and may be switched off for theater use.

• Power outPut: Minimum sine wave continuous average power output per channel, all channels operating: 300 W into a 2 Ω, 4 Ω or 8 Ω load
• Output Load Impedance: 2, 4 or 8 Ω
• Rated Power Band: 20 Hz to 20,000 Hz
• Total Harmonic Distortion: 0.005% maximum harmonic distortion at any power level from 250 mW to rated power, 20 Hz to 20,000 Hz
• Dynamic Headroom: 1.8 dB
• Frequency Response: +0, -0.25 dB from 20 Hz to 20,000 Hz; +0, -3 dB from 10 Hz to 100,000 Hz
• Input Sensitivity (for Rated Output): 1.7 V Unbalanced, 3.4 V Balanced
• Signal To Noise Ratio (a-weighted): 112 dB below rated output
• Intermodulation Distortion: 0.005% maximum, if the instantaneous peak power output does not exceed twice the rated power output for any combination of frequencies from 20 Hz to 20,000 Hz
• Wide Band Damping Factor: Greater than 40
• Input Impedance: 10,000 Ω
• Power guard: Less than 2% THD with up to 14 dB overdrive at 1,000 Hz
• Power Control Input: 5 VDC - 12 VDC
• Power Control Output: 12 VDC, 25 mA maximum, delay 0.2 seconds
• Power Requirements: 100 V, 50/60 Hz at 12 A; 110 V, 50/60 Hz at 11 A; 120 V, 50/60 Hz at 10 A; 220 V, 50/60 Hz at 6 A; 230 V, 50/60 Hz at 6 A; 240 V, 50/60 Hz at 6 A; Standby: Less than 1 W; Note: Refer to the rear panel of the MC303 for the correct voltage