These are not the same size of amplifier: Bluesound POWERNODE has roughly 2.7x the power of Rega io. That is about 4.3dB, 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 | Bluesound POWERNODE has more power - 80W against 30W into 8 ohms. That is about 4.3dB, so it plays usefully louder before it runs out and has more in hand on peaks. |
| Room size | depends | We rate Rega io the better fit for desk or near-field listening and a small room, and Bluesound POWERNODE for a mid-size room, a large room and a very large room. Match the amplifier to the room you actually have, not the one you want. |
| Built-in DAC | B | Bluesound POWERNODE has a DAC on board; the other needs an external one, which is another box, another power lead and another purchase. |
| Streaming | B | Only Bluesound POWERNODE has AirPlay 2, Roon and BluOS. |
| Analogue inputs | evenly matched | The same number of line-level inputs (2). |
| Phono stage | depends | Rega io has a built-in phono stage (MM) and Bluesound POWERNODE does not. Decisive if you own a turntable, completely irrelevant if you do not - and an outboard phono stage is easy to add later either way. |
| Room to grow | B | Only Bluesound POWERNODE offers preamp outputs and a subwoofer output - which decides whether you can add a subwoofer or a power amplifier later without replacing the box. |
| Amplifier class | depends | Rega io is Class A/B and Bluesound POWERNODE is Class D. Class A/B runs warm and is the long-established mainstream choice; Class D runs cool and draws almost nothing at idle. Modern examples of both measure well - judge by the rest of the page. |
| Shelf space | depends | Bluesound POWERNODE takes up about 19% less shelf area (420cm² against 522cm²), and it is 100mm shallower, which is the measurement that decides whether a rack door shuts. |
| Price | A | Rega io costs less - $725 against $949 at list. |
| Watts per dollar | B | Bluesound POWERNODE is the cheaper watt - about $12 per watt against $24. A blunt measure, and it says nothing about how either sounds, but it is the honest one for raw output. |
A Rega io B Bluesound POWERNODE
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?
Bluesound POWERNODE leads across most of the measured areas for a fairly modest premium, so it is the easier pick if the budget stretches. Rega io is the one to take if it does not. 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 - Bluesound POWERNODE has the headroom, and headroom is what stops an amplifier hardening up on peaks. At desk distance or in a small room, 30 watts is already more than most people ever use, and the extra 50 watts would be headroom you pay for and never hear - we rate Bluesound POWERNODE poorly for near-field use for exactly that reason. If you play records, Rega io saves you buying a phono stage; if you do not, ignore that row entirely.
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.