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 | evenly matched | Effectively the same output - 50W against 45W into 8 ohms is under 1dB, which is not an audible difference in loudness. |
| Grip on hard loads | A | PS Audio Sprout100 holds up better into a 4-ohm load: its output nearly doubles to 100W, where the other increases modestly. That matters with demanding speakers far more than the 8-ohm figure does. |
| Noise floor | B | LEAK Stereo 130 is the quieter design on paper - 108dB against 100dB. Audible mainly with sensitive speakers in a quiet room. |
| Built-in DAC | evenly matched | Both have a DAC on board with much the same capability. |
| Analogue inputs | evenly matched | The same number of line-level inputs (2). |
| Room to grow | evenly matched | The same expansion options on both. |
| Amplifier class | depends | PS Audio Sprout100 is Class D and LEAK Stereo 130 is Class A/B. Class D runs cool and draws almost nothing at idle; 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. |
| Shelf space | depends | PS Audio Sprout100 takes up about 71% less shelf area (329cm² against 1115cm²), and it is 131mm shallower, which is the measurement that decides whether a rack door shuts. |
| Price | A | PS Audio Sprout100 costs less - $799 against $995 at list. |
| Watts per dollar | A | PS Audio Sprout100 is the cheaper watt - about $16 per watt against $22. A blunt measure, and it says nothing about how either sounds, but it is the honest one for raw output. |
A PS Audio Sprout100 B LEAK Stereo 130
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?
PS Audio Sprout100 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 Sprout100 is the safer partner, because how an amplifier behaves when the impedance drops matters more than its 8-ohm rating.
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.