These are not the same size of amplifier: Peachtree Carina has roughly 2.1x the power of PS Audio Stellar S300. That is about 3.3dB, so it is a question of room size and how hard your speakers are to drive, not of one being the better amplifier.
| Area | Better | Why |
|---|
| Power | B | Peachtree Carina has more power - 300W against 140W into 8 ohms. That is about 3.3dB, so it plays usefully louder before it runs out and has more in hand on peaks. |
| Room size | depends | We rate PS Audio Stellar S300 the better fit for desk or near-field listening, a small room and a mid-size room, and Peachtree Carina for a very large room. Match the amplifier to the room you actually have, not the one you want. |
| Grip on hard loads | A | PS Audio Stellar S300 holds up better into a 4-ohm load: its output nearly doubles to 300W, where the other nearly doubles. That matters with demanding speakers far more than the 8-ohm figure does. |
| Noise floor | B | Peachtree Carina is the quieter design on paper - 116dB against 100dB. Audible mainly with sensitive speakers in a quiet room. |
| Built-in DAC | B | Peachtree Carina has a DAC on board; the other needs an external one, which is another box, another power lead and another purchase. |
| Headphones | depends | Only Peachtree Carina has a headphone output. Worth something if you listen late, nothing if you never do. |
| Price | evenly matched | Priced within a few per cent of each other. |
| Watts per dollar | B | Peachtree Carina is the cheaper watt - about $7 per watt against $14. A blunt measure, and it says nothing about how either sounds, but it is the honest one for raw output. |
A PS Audio Stellar S300 B Peachtree Carina
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?
Peachtree Carina has the edge on paper, though not by much. The rows marked "depends" are more likely to decide this than the score is. If your speakers are a difficult load - 4 ohms nominal, big woofers, or a sensitivity in the low 80s - PS Audio Stellar S300 is the safer partner, because how an amplifier behaves when the impedance drops matters more than its 8-ohm rating. Start with the room. In a large or open-plan room, or with speakers that are hard to drive - low sensitivity, or an impedance that dips - Peachtree Carina has the headroom, and headroom is what stops an amplifier hardening up on peaks. At desk distance or in a small room, 140 watts is already more than most people ever use, and the extra 160 watts would be headroom you pay for and never hear - we rate Peachtree Carina poorly for near-field use for exactly that reason.
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.