Always amused at people who make comments about McIntosh like the ones above. Rolled off highs, warm, less resolution, muffled, more lifestyle than high end performance. Auditioning McIntosh at Magnolia, streaming via Bluesound and thinking you actually heard a system at its best is revealing, then claiming the B&W speakers are capable of so much more, and Audio Research is the High End brand of that group. I have no issues with the anyone's opinions, just their accuracy.
MC601 power amplifier:
Frequency Response +0, -0.25dB from 20Hz to 20,000Hz, +0, -3.0dB from 10Hz to 100,000Hz at full rated output. Where's the roll off, and where's the peak in the lower midrange that would demonstrate warmth. Total Harmonic Distortion: 0.005% maximum harmonic distortion at any power level from 250 milliwatts to rated power, 20Hz to 20,000Hz. This is typical for McIntosh power amplifier specifications across their catalog.
Come on now, lets get real. There are plenty of people who know McIntosh is really designed and marketed specifically to old men, doctors, and lawyers who have no clue what good sound is all about, and are only concerned with showing off cool lifestyle products in their fancy homes. That's why McIntosh puts so little effort into their amplifier designs. There's no point in wasting research and design dollars trying to be competitive in the marketplace when their customers can't hear a difference in the first place. I mean, it's common knowledge, right?
Does McIntosh have a house sound. Certainly, just like every other audio component manufacturer. Just like their competitors, McIntosh continuously tries to please the widest audience, making adjustments in their designs over time to remain current. Again, no different than Audio Research, Pass Labs, Bryston, Ayre and the rest. There is no such thing as a perfect power amplifier, one that introduces zero influence on the signal that passes through its circuits. Neutral is a fantasy in the ear of component owners. Every audio amplifier influences the sound in one way or another, just like preamplifiers, speakers, source components, cables, power conditioners, vibration control, and any number of other system contributions. You either like the final results or not. For some, bashing McIntosh is full time entertainment. The good thing about opinions is we all have them. That's what keeps our hobby interesting and fun.