

Hertz UNO S 300 S4 12" 30cm Car Audio Sub Component Subwoofer 4 Ohm 250w RMS
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HERTZ S 300 S4 Subwoofer 300 (12) mm (in.) | Uno subwoofer | 1000 W | 4 Ohm
The 30 cm (12’) S 300 S4 car audio subwoofer, designed to obtain powerful deep bass in any installation, is the last addition to the Uno product range.
Thanks to the efficiency of 89.5 dB, achieved using lightweight materials such as paper for the cone and high density foam for the suspension, the component provides the ability to easily reach high sound pressures in the car compartment.
The exclusive patented V-cone® system ensures maximum stiffness through wide excursions, thus obtaining low undistorted frequencies at high volume.
The S 300 S4 is optimized for both reflex and sealed enclosures. The resonance frequency is as low as 33 Hz, a particularly low value considering the speaker’s high efficiency. This figure proves the degree of commitment of the Hertz R&D team to the project, aiming at maximizing the output quality and level. A pre-assembled gasket in ABS refines the product’s cosmetics ensuring an appealing look once installed.
V-CONE®
The exponential profile gets very close to the perfect one, providing exceptional dispersion.
- Very high efficiency, superior power handling;
- V-cone® with pressed paper membrane for maximum lightness;
- High excursion foam surround combining high sensitivity and deep bass response;
- Pure copper voice coil, wound on aluminium former, for exceptional thermal and mechanical capacity;
- FEM refined motor structure employing low-carbon content steel and high-density flux ferrite magnet;
- Designed to be used in small sealed or reflex box;
- ABS gasket provided for aesthetically pleasant installation.
Specification
| Power Handling | - Continuous W 250 |
|---|---|
| Power Handling | - Peak W 1000 |
| Impedance | Ohm 4 |
| Voice Coil | Ø 38 (1.5) |
| Magnet | size D x d x h mm (in.) 134 x 45 x 34 (5.28 x 1.77 x 1.34) |
| Weight | of one component kg (lb.) 3 (6.61) |
| Magnet | High density flux ferrite |
| Cone | Painted Pressed Paper Pulp |
More specs
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What's Included
- 12" Subwoofer
- Screws
- Speed clips
- Owner's manual
- Template on box
FAQs
Q: Do I need an amplifier for this subwoofer?
A: Yes, unless it is an active (powered) subwoofer with a built-in amplifier. Passive subwoofers need an external amplifier matched to the RMS power and impedance shown in the Specification tab.
Q: What size enclosure does this subwoofer need?
A: The recommended enclosure volume is listed in the Specification tab where the manufacturer provides it. As a rule, sealed enclosures give tighter, more accurate bass while ported enclosures deliver more output. Contact CEN if you would like a recommendation for your build.
Q: What does RMS power mean?
A: RMS is the continuous power a subwoofer can handle, and it is the number that matters when matching an amplifier. Peak or max figures describe short bursts only. Match your amplifier output to the RMS rating in the Specification tab.
Q: Sealed or ported enclosure - which should I choose?
A: Sealed boxes are compact and produce tight, controlled bass suited to sound quality builds. Ported boxes are larger and produce more output at low frequencies, suited to those who want maximum impact. Either works well when built to the recommended volume.
Q: Can CEN build or supply an enclosure and fit everything?
A: Yes. CEN supplies enclosures and offers professional installation from our Nottingham premises, including amplifier wiring. Contact us to discuss your build.
About the brand
Hertz
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