For most rooms, choose an 8-inch subwoofer for spaces up to about 15 m², a 10-inch for about 15 to 30 m², a 12-inch for about 25 to 45 m², and a 15-inch for larger rooms and dedicated home cinemas. A bigger driver moves more air, so it plays deep bass louder and with less strain. In a small room that extra output is wasted and the bass can boom. Room size comes first, then music or movies, then the space you have. This guide uses Wharfedale's four NOVA subwoofers, 8, 10, 12 and 15 inches, as the worked example.
Subwoofer size by room
These are rough guides for a typical Australian lounge or media room. An open-plan space counts as the whole open area, not just the corner where the TV sits.
| Room size | Example room | Driver size | NOVA model |
|---|---|---|---|
| Up to about 15 m² | Bedroom, study, apartment lounge | 8" | NOVA 8 |
| About 15 to 30 m² | Typical lounge room | 10" | NOVA 10 |
| About 25 to 45 m² | Large lounge, open-plan living | 12" | NOVA 12 |
| Over about 40 m² | Dedicated home cinema, large open-plan | 15" | NOVA 15 |
What changes as the size goes up
Look at the NOVA specifications side by side. All four reach down into the high 20s or low 30s Hz. What grows with size is the amplifier power and the cone area, which is what lets the bigger models play those low notes louder and more cleanly.
| Model | Driver | Amplifier (nominal / peak) | Bass extension (-6 dB) | Size (H × W × D) | Weight |
|---|---|---|---|---|---|
| NOVA 8 | 8" (200 mm) + 10" passive radiator | 200 W / 500 W | 33 Hz | 348 × 320 × 361 mm | 16.3 kg |
| NOVA 10 | 10" (250 mm) + 10" passive radiator | 260 W / 500 W | 29 Hz | 391 × 363 × 408 mm | 22.2 kg |
| NOVA 12 | 12" (300 mm) + 12" passive radiator | 280 W / 770 W | 28 Hz | 443 × 435 × 487 mm | 29.3 kg |
| NOVA 15 | 15" (380 mm) + 15" passive radiator | 360 W / 770 W | 28 Hz | 549 × 540 × 607 mm | 47.8 kg |
So the question is not "how low does it go" but "how much room does it have to fill". In a 12 m² study a NOVA 8 reaches 33 Hz with plenty in hand. Ask it to fill a 50 m² open-plan room at film volume and it will run out of headroom long before a NOVA 15 does.
Music or movies?
For music, the aim is a subwoofer that blends in so you cannot hear where the bass comes from. Pick the size for your room and do not go bigger: speed and control matter more than sheer output. With small bookshelf speakers, a sub fills in the bottom octave they cannot reach.
For movies, soundtracks carry a dedicated low-frequency effects channel (LFE), with explosions and rumble that need far more output than music. If home cinema is the main use, go one size up from the room guide, or add a second subwoofer.
Space, placement and connections
- Short on space? The Slim Bass 8 is only about 19 cm tall, so it slides under a sofa or sits flat against a wall.
- Placement. Start with the sub near the front speakers, then try a corner for more output. A simple trick is to put the sub in your listening seat, play a bass-heavy track, and crawl around the front of the room. Where the bass sounds smoothest is where the sub should go.
- Two smaller subs or one big one? In larger rooms, two subwoofers placed apart give smoother bass across more seats than one larger sub.
- Connecting to a stereo amplifier. Many stereo amplifiers have no subwoofer output. The NOVA subwoofers accept a speaker-level (high-level) input, so they connect from your amplifier's speaker terminals as well as from an AV receiver's LFE output.
Other Wharfedale subwoofers
The NOVA series uses a long-throw driver paired with a passive radiator (Wharfedale calls it an Auxiliary Bass Radiator), with DSP control and adjustable crossover, phase and level. Wharfedale also makes the WH-D8 and WH-D10 for compact systems, and the SW series (SW-10, SW-12 and SW-15) for larger cinema rooms. The same room-size guide applies to every range. Browse them all in subwoofers.
Frequently asked questions
Is a 10-inch subwoofer enough?
For a typical lounge room of about 15 to 30 m², yes. A 10-inch sub such as the NOVA 10 reaches 29 Hz (-6 dB), which covers almost all music and most film soundtracks. Go to 12 inches for a larger or open-plan room, or if home cinema is the main use.
Is a bigger subwoofer always better?
No. A bigger sub plays louder with less strain, but in a small room it can overload the space and make the bass boomy. Match the size to the room.
8-inch vs 10-inch subwoofer: what is the difference?
In the NOVA range, the 10-inch model has more amplifier power (260 W vs 200 W nominal) and reaches slightly lower (29 Hz vs 33 Hz at -6 dB). The 8-inch suits bedrooms, studies and apartments; the 10-inch suits a typical lounge.
Can I use a subwoofer with a stereo amplifier?
Yes. If your amplifier has a subwoofer or pre-out, use the line input. If it does not, the NOVA subwoofers connect from the amplifier's speaker terminals through their speaker-level input.
Where should I put my subwoofer?
Start near the front speakers. Corners give more output but can sound boomy. The most reliable method is the "subwoofer crawl" described above: listen from the floor at different spots and place the sub where the bass sounds smoothest.
Should I get one subwoofer or two?
One is enough for most rooms. Two give smoother bass across several seats and more headroom, which helps in large rooms and dedicated cinemas.
Still deciding? Contact us with your room size and system, or book a demonstration at a Wharfedale dealer.
