Alpine
Alpine R2-W12D4 (Type-R)
$449.95Cheaper
Best Car Subwoofers · head-to-head
Alpine R2-W12D4 (Type-R) vs Hertz Mille Pro MPS 300 S4
A sourced, side-by-side comparison. Alpine R2-W12D4 (Type-R) is cheaper at $449.95. Every spec and price links to its source.
Hertz
Hertz Mille Pro MPS 300 S4
$680
Which is better: the Alpine R2-W12D4 (Type-R) or Hertz Mille Pro MPS 300 S4?
The Hertz Mille Pro MPS 300 S4 wins 1 of the 1 specs we compare head to head; the other wins 0. The Alpine R2-W12D4 (Type-R) is the cheaper at $449.95. Get the Hertz Mille Pro MPS 300 S4 for the stronger spec sheet, the Alpine R2-W12D4 (Type-R) to spend less.
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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) | Hertz Mille Pro MPS 300 S4 |
|---|---|---|
| US price | $449.95 | $680 |
| Brand | Alpine | Hertz |
| Released | — | — |
| Cone size (in) | 12 | 12 |
| Rms power watts | 750 | 500 |
| Peak power watts | 2250 | 1000 |
| Impedance ohms | 4 | 4 |
| Voice coil config | dual-voice-coil | single-voice-coil |
| Sensitivity (dB) | 84.5 | 85 |
| Frequency response (Hz) | 24-200 | 25-400 |
| Enclosure type | component-driver | component-driver |
| Mounting depth (in) | 6.5 | 3.46 |
| Xmax (mm) | 20 | — |
| Weight (lb) | 15 | 14.64 |
Sources — Alpine R2-W12D4 (Type-R): alpine-usa.com (verified 2026-07-11). Hertz Mille Pro MPS 300 S4: hertz-audio.com (verified 2026-07-11).
What's the difference between the Alpine R2-W12D4 (Type-R) and Hertz Mille Pro MPS 300 S4?
Where the two actually differ on the specs we track (7 of 11). Matching specs are omitted.
- Rms power watts: Alpine R2-W12D4 (Type-R) 750 vs Hertz Mille Pro MPS 300 S4 500
- Peak power watts: Alpine R2-W12D4 (Type-R) 2250 vs Hertz Mille Pro MPS 300 S4 1000
- Voice coil config: Alpine R2-W12D4 (Type-R) dual-voice-coil vs Hertz Mille Pro MPS 300 S4 single-voice-coil
- Sensitivity (dB): Alpine R2-W12D4 (Type-R) 84.5 vs Hertz Mille Pro MPS 300 S4 85
- Frequency response (Hz): Alpine R2-W12D4 (Type-R) 24-200 vs Hertz Mille Pro MPS 300 S4 25-400
- Mounting depth (in): Alpine R2-W12D4 (Type-R) 6.5 vs Hertz Mille Pro MPS 300 S4 3.46
- Weight (lb): Alpine R2-W12D4 (Type-R) 15 vs Hertz Mille Pro MPS 300 S4 14.64