These are not the same size of amplifier: SVS Prime SoundBase has roughly 2.5x the power of NAD D 3020 V2. That is about 4dB, 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 | SVS Prime SoundBase has more power - 75W against 30W into 8 ohms. That is about 4dB, so it plays usefully louder before it runs out and has more in hand on peaks. |
| Room size | depends | We rate NAD D 3020 V2 the better fit for desk or near-field listening and a small room, and SVS Prime SoundBase 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 | A | NAD D 3020 V2 is the quieter design on paper - 98dB against 90dB. Audible mainly with sensitive speakers in a quiet room. |
| Built-in DAC | B | Both decode on board. SVS Prime SoundBase goes higher - 192kHz against 96kHz. Very few recordings exist above 192kHz, so treat this as headroom, not as sound quality. |
| Streaming | B | Only SVS Prime SoundBase has AirPlay 2, Chromecast and DTS Play-Fi. |
| Analogue inputs | B | SVS Prime SoundBase takes more analogue sources - 2 against 1. |
| Phono stage | depends | NAD D 3020 V2 has a built-in phono stage (MM) and SVS Prime SoundBase 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. |
| Use with a TV | depends | Only SVS Prime SoundBase has HDMI ARC/eARC, so the television can drive it directly and one remote controls the volume. If the system is for music only, this changes nothing. |
| Room to grow | evenly matched | The same expansion options on both. |
| Shelf space | depends | NAD D 3020 V2 takes up about 72% less shelf area (146cm² against 517cm²), and it is 24mm shallower, which is the measurement that decides whether a rack door shuts. |
| Price | A | NAD D 3020 V2 costs less - $499 against $699 at list. |
| Watts per dollar | B | SVS Prime SoundBase is the cheaper watt - about $9 per watt against $17. A blunt measure, and it says nothing about how either sounds, but it is the honest one for raw output. |
A NAD D 3020 V2 B SVS Prime SoundBase
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?
The usual trade-off: SVS Prime SoundBase measures better, NAD D 3020 V2 costs about 29% less. With most speakers in most rooms that gap is smaller in practice than it looks here. 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 - SVS Prime SoundBase 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 45 watts would be headroom you pay for and never hear - we rate SVS Prime SoundBase poorly for near-field use for exactly that reason. If you play records, NAD D 3020 V2 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.