McIntosh MC3500 MKII

The MC3500 MKII is a valve power amplifier from McIntosh, designed to deliver high, consistent power regardless of the connected speaker's impedance. It belongs to the range of high-power valve amplifiers intended for demanding installations, capable of driving 2, 4 or 8 ohm loads without compromise.

Its power output of 350 watts is delivered into 2, 4 and 8 ohms thanks to the McIntosh Unity coupled-circuit output transformer, which allows this full power to be maintained regardless of the impedance of the speaker used. The output stage relies on eight EL509S valves, chosen for their robustness and their high peak current capability, exceeding 1 A. The fully balanced driver stage uses three 12AX7A valves for input, buffer and voltage amplification, along with a 12AT7 valve as a buffer stage for the output valves. Distortion stands at 0.3%, frequency response extends from 10 Hz to 70 kHz (+/- 3 dB) and the signal-to-noise ratio reaches 120 dB.

• Power: 350 watts into 2, 4 and 8 ohms
• Eight EL509S output valves
• Balanced driver stage with 12AX7A and 12AT7 valves
• McIntosh Unity output transformer

This model is aimed at valve amplification enthusiasts seeking high power and compatibility with speakers of varying sensitivity or impedance. Its imposing format, weighing 54.9 kg with dimensions of 457 x 300 x 549 mm, suits a dedicated installation intended for demanding listening rather than portable or compact use.