No single best amplifier here. What decides it is what you have to drive, what you need to plug in, and how much of the system you want in one box.
| Area | Better | Why |
|---|
| Power | B | McIntosh MC152 has more power - 150W against 100W into 8 ohms. That is about 1.8dB, which is a small step in loudness but real headroom on peaks. |
| Analogue inputs | B | McIntosh MC152 takes more analogue sources - 2 against 1. |
| Amplifier class | depends | PS Audio PMG S200 is Class A/AB and McIntosh MC152 is Class A/B. Class A/B runs warm and is the long-established mainstream choice. Modern examples of both measure well - judge by the rest of the page. |
| Price | B | McIntosh MC152 costs less - $6,500 against $7,999 at list. |
| Watts per dollar | B | McIntosh MC152 is the cheaper watt - about $43 per watt against $80. A blunt measure, and it says nothing about how either sounds, but it is the honest one for raw output. |
A PS Audio PMG S200 B McIntosh MC152
depends neither is better in the abstract - it turns on your room, your system or how you will use them. Only specs published for both amplifiers are judged; anything missing on either side is left out rather than guessed.
Which should you choose?
McIntosh MC152 is the easier recommendation: it leads on most of the measured areas and costs less. Take PS Audio PMG S200 if one of the "depends" rows above describes your system.
What a spec sheet cannot show: how either sounds with your speakers, how the controls feel day to day, and what the app is like to live with - which is where most all-in-one amplifiers are actually won or lost. Power figures are the manufacturers' own and are not measured to a common standard, so treat small differences as noise. If you can hear both, that will tell you more than any row above.