Hertz Cento CS 300 S2 / S4

Hertz Cento CS 300 S2 / S4 – 12-inch Subwoofer for Small Enclosures

The Hertz Cento CS 300 S2 / S4 is a 12-inch subwoofer that delivers powerful and clean deep bass from compact, sealed enclosures. Depending on your setup, you can choose the 2- or 4-ohm version. The motor is aerodynamically optimized, cooling is efficiently designed, and rear decompression vents have been omitted – ideal if you want to build a form-fitting, space-saving box. Available at Carhifi.shop.

Technical Highlights

• Designed for sealed enclosures starting from 32 liters volume
• Flow-optimized design reduces air compression and distortion at high excursions
• Polypropylene cone and dust cap, FEM-simulated to minimize low-frequency distortion
• 35 mm voice coil, multi-layered wound with pure copper on a high-temperature resistant fiberglass former
• Magnet assembly software-optimized for high, undistorted sound pressure at large excursions
• No rear decompression vent – allows for very compact, custom-fit boxes
• Screw terminal block with solid pressure contacts for up to 8 AWG – low wire resistance, even in multi-sub setups
• Magnet rubber and robust ABS gasket, prepared for optional protective grille

Technical Data

• Size: 300 mm (12")
• Power Handling RMS: 350 W
• Power Handling Peak: 700 W
• Impedance: 2 Ω or 4 Ω (S2 / S4)
• Voice Coil: Ø 35 mm
• Magnet Size (W x D x H): 134 x 45 x 34 mm
• Weight: 4.844 kg
• Magnet: High-density ferrite
• Cone: Polypropylene
• Xmech: 16.5 mm

Electro-acoustic Data

• Effective Diameter (D): 267.01 mm
• Xmax: 12.5 mm
• Re: 2.2 Ω
• Fs: 25 Hz
• Le: 2.8 mH
• Vas: 87.25 l
• Mms: 205 g
• Cms: 0.20 mm/N
• BL: 12 T·m
• Qts: 0.46
• Qes: 0.49
• Qms: 7.2
• Sensitivity: 86.5 dB

Physical Dimensions

• A: 318 mm
• B (Cut-out Diameter): 281 mm
• C (Overall Depth): 147 mm
• D (Mounting Depth): 130 mm
• E (Outer Diameter): 308 mm
• F (Flange Thickness): 28.3 mm

Enclosure Recommendation: Sealed Box

• Vb: 32 l (1.13 cu ft)
• Fb: 50 Hz
• Qtc: 0.9
• Box Dimensions (W x H x D): 495 x 495 x 200 mm
• Mounting Cut-out: 281 mm
• Material Thickness: 19 mm

Panel Cut List – Sealed

• A: 495 x 495 mm (2x)
• B: 495 x 162 mm (2x)
• C: 475 x 162 mm (2x)

Installation & Compatibility

The CS 300 S2 / S4 plays controlled and deep in small sealed enclosures. It pairs well with monoblocks delivering around 350 W RMS at the respective impedance. The solid terminals accommodate up to 8 AWG, simplifying wiring in single or multi-subwoofer systems. If you want to use as little space as possible, the version without a rear decompression vent is a plus – the enclosure can be constructed very tightly around the subwoofer.