Alpine
Alpine R2-W12D4 (Type-R)
$449.95
Best Car Subwoofers · head-to-head
Alpine R2-W12D4 (Type-R) vs Sundown Audio SA-12 v.2 D2
A sourced, side-by-side comparison. Sundown Audio SA-12 v.2 D2 is cheaper at $419.99. Every spec and price links to its source.
Sundown Audio
Sundown Audio SA-12 v.2 D2
$419.99Cheaper
Which is better: the Alpine R2-W12D4 (Type-R) or Sundown Audio SA-12 v.2 D2?
On the specs we track, they're closely matched. The Sundown Audio SA-12 v.2 D2 is the cheaper at $419.99.
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Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | Alpine R2-W12D4 (Type-R) | Sundown Audio SA-12 v.2 D2 |
|---|---|---|
| US price | $449.95 | $419.99 |
| Brand | Alpine | Sundown Audio |
| Released | — | — |
| Cone size (in) | 12 | 12 |
| Rms power watts | 750 | 1250 |
| Peak power watts | 2250 | 2500 |
| Impedance ohms | 4 | 2 |
| Voice coil config | dual-voice-coil | dual-voice-coil |
| Sensitivity (dB) | 84.5 | 86.59 |
| Frequency response (Hz) | 24-200 | — |
| Enclosure type | component-driver | component-driver |
| Mounting depth (in) | 6.5 | 7.5 |
| Xmax (mm) | 20 | 19 |
| Weight (lb) | 15 | — |
Sources — Alpine R2-W12D4 (Type-R): alpine-usa.com (verified 2026-07-11). Sundown Audio SA-12 v.2 D2: sundownaudio.com (verified 2026-07-11).
What's the difference between the Alpine R2-W12D4 (Type-R) and Sundown Audio SA-12 v.2 D2?
Where the two actually differ on the specs we track (6 of 11). Matching specs are omitted.
- Rms power watts: Alpine R2-W12D4 (Type-R) 750 vs Sundown Audio SA-12 v.2 D2 1250
- Peak power watts: Alpine R2-W12D4 (Type-R) 2250 vs Sundown Audio SA-12 v.2 D2 2500
- Impedance ohms: Alpine R2-W12D4 (Type-R) 4 vs Sundown Audio SA-12 v.2 D2 2
- Sensitivity (dB): Alpine R2-W12D4 (Type-R) 84.5 vs Sundown Audio SA-12 v.2 D2 86.59
- Mounting depth (in): Alpine R2-W12D4 (Type-R) 6.5 vs Sundown Audio SA-12 v.2 D2 7.5
- Xmax (mm): Alpine R2-W12D4 (Type-R) 20 vs Sundown Audio SA-12 v.2 D2 19