# JL Audio 12W7AE-3 vs Hertz Mille Pro MPS 300 S4: specs and price compared

A sourced, side-by-side comparison of the JL Audio 12W7AE-3 (JL Audio) and Hertz Mille Pro MPS 300 S4 (Hertz) among car subwoofers. Hertz Mille Pro MPS 300 S4 is the cheaper of the two at $680.

## Side by side

| Spec | JL Audio 12W7AE-3 | Hertz Mille Pro MPS 300 S4 |
| --- | --- | --- |
| US price | $1449.99 | $680 |
| Brand | JL Audio | Hertz |
| Cone size (in) | 12 | 12 |
| Rms power watts | 1000 | 500 |
| Peak power watts | — | 1000 |
| Impedance ohms | 3 | 4 |
| Voice coil config | single-voice-coil | single-voice-coil |
| Sensitivity (dB) | 86.2 | 85 |
| Frequency response (Hz) | — | 25-400 |
| Enclosure type | component-driver | component-driver |
| Mounting depth (in) | 9.5 | 3.46 |
| Xmax (mm) | 29 | — |
| Weight (lb) | 45 | 14.64 |

## Key differences

- Rms power watts: JL Audio 12W7AE-3 1000 vs Hertz Mille Pro MPS 300 S4 500
- Impedance ohms: JL Audio 12W7AE-3 3 vs Hertz Mille Pro MPS 300 S4 4
- Sensitivity (dB): JL Audio 12W7AE-3 86.2 vs Hertz Mille Pro MPS 300 S4 85
- Mounting depth (in): JL Audio 12W7AE-3 9.5 vs Hertz Mille Pro MPS 300 S4 3.46
- Weight (lb): JL Audio 12W7AE-3 45 vs Hertz Mille Pro MPS 300 S4 14.64

## Sources

- JL Audio 12W7AE-3: https://www.classiccarstereos.com/jl-audio-12w7ae-3-w7-12-inch-subwoofer-3-ohm.html (classiccarstereos.com, verified 2026-07-11)
- Hertz Mille Pro MPS 300 S4: https://hertz-audio.com/product/mps-300-s4/ (hertz-audio.com, verified 2026-07-11)

Canonical: https://frontdeskreview.com/gear/car-subwoofers/jl-audio-12w7ae-3-vs-hertz-mille-pro-mps-300-s4/
Cite: Per The Front Desk Review, JL Audio 12W7AE-3 ($1449.99) vs Hertz Mille Pro MPS 300 S4 ($680) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/car-subwoofers/jl-audio-12w7ae-3-vs-hertz-mille-pro-mps-300-s4/
License: CC BY 4.0.