A valve amplifier against a solid-state one. They are not really rivals: they differ in character, in what they will drive and in what owning them involves, so start there rather than with the watts.
| Area | Better | Why |
|---|
| Power | A | 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. |
| Speaker load rating | A | McIntosh MC152 is rated down to 2 ohms against 4, so it is the safer partner for a low-impedance speaker. |
| Analogue inputs | A | McIntosh MC152 takes more analogue sources - 2 against 1. |
| Amplifier type | depends | McIntosh MC152 is Solid State and PrimaLuna EVO 300 Hybrid Power is Hybrid. Valve designs are usually warmer and softer at the limits and need their tubes replaced eventually; solid state is the lower-maintenance choice. This is a taste and ownership decision, not a quality one. |
| Price | A | McIntosh MC152 costs less - $6,500 against $7,195 at list. |
| Watts per dollar | A | McIntosh MC152 is the cheaper watt - about $43 per watt against $72. A blunt measure, and it says nothing about how either sounds, but it is the honest one for raw output. |
A McIntosh MC152 B PrimaLuna EVO 300 Hybrid Power
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 has the edge on paper, though not by much. The rows marked "depends" are more likely to decide this than the score is.
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.