One is a streaming all-in-one and the other is an amplifier. Judge them on how many boxes you want and what you already own, not on the spec sheet alone.
| Area | Better | Why |
|---|
| Power | B | Bluesound POWERNODE has more power - 80W against 60W into 8 ohms. That is about 1.2dB, which is a small step in loudness but real headroom on peaks. |
| Room size | depends | We rate NAD D 3045 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. |
| Noise floor | evenly matched | Much the same signal-to-noise ratio (98dB vs 100dB). |
| Built-in DAC | B | Both decode on board, but only Bluesound POWERNODE handles MQA. |
| 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 | NAD D 3045 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 | evenly matched | The same expansion options on both. |
| Shelf space | depends | NAD D 3045 takes up about 51% less shelf area (208cm² against 420cm²), and it is 99mm shallower, which is the measurement that decides whether a rack door shuts. |
| Price | A | NAD D 3045 costs less - $899 against $949 at list. |
| Watts per dollar | B | Bluesound POWERNODE is the cheaper watt - about $12 per watt against $15. A blunt measure, and it says nothing about how either sounds, but it is the honest one for raw output. |
A NAD D 3045 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. NAD D 3045 is the one to take if it does not. If you play records, NAD D 3045 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.