300 Watts RMS 12 Inch Car Subwoofer Loaded in Sealed Enclosure With Heavy 135 mm Double Magnets 18mm MDF

Description

12 Inch Car Subwoofer with Stainless Steel Grill

Engineered for serious car audio enthusiasts, the 4D Furnishers 12 Inch Car Subwoofer (300W RMS / 1200W Peak) brings punchy, low-frequency performance into your vehicle while offering rugged protection against boot space hazards.

Built with a high-excursion driver featuring 135mm double-stacked ferrite magnets, high-durability rubber surround with colored accent stitching, and a mounted stainless steel protective bar grill, this subwoofer delivers clean, chest-thumping bass notes without structural cone distortion or physical damage.

Key Acoustic Features & Structural Engineering

Linear Acoustic Tuning & Balanced Frequency Response

Unlike ported or bandpass enclosures that create an artificial “one-note” bass spike around port tuning frequencies, this sealed 18mm MDF cabinet design delivers a smooth, tight, and highly linear frequency response. By dampening the back-wave energy inside the sealed chamber, it prevents unnatural peaks, ensuring every low-end note from 10 Hz to 200 Hz stays perfectly balanced, natural, and free of boomy distortion.

Heavy-Duty 18mm MDF Sealed Enclosure with Black Carpet Wrap

To eliminate cabinet wall flexing and acoustic energy leakage, the driver comes pre-housed in a precision-built 18mm Medium-Density Fiberboard (MDF) sealed cabinet wrapped in a high-density black carpet finish. The dense 18mm MDF structure acts as an inert acoustic baffle, dampening internal cabinet resonances so all output energy is directed outward into the cabin rather than wasted through panel vibration.

Heavy-Duty Stainless Steel Protective Bar Grill

Trunk and boot space environments put subwoofers at constant risk from shifting luggage, spare tires, and tools. This model comes fitted with a custom-engineered stainless steel protective bar grill secured via heavy-duty corner brackets. Unlike traditional mesh grills that obstruct acoustic wave propagation or rattle during high displacement, these steel bars deliver maximum physical shield protection while leaving airflow unrestricted.

135mm Double Magnet Motor Engine

Underneath the cone sits a dual-stacked 135mm ferrite ring magnet assembly. This creates an exceptionally dense magnetic field, allowing the voice coil to maintain linear movement even during sustained, low-frequency bass drops.

Reinforced Surround with Colored Accent Stitching

To maintain cone alignment during extreme excursion, the driver uses a high-roll rubber surround double-stitched directly into the cone matrix with high-tensile green threading. This construction prevents surround decoupling, dampens unwanted harmonic distortion, and withstands high cabin temperatures.

Specifications

Amplification & Setup Guidelines

• Amplifier Matching: Pair with a dedicated mono-block or 2-channel bridged power amplifier delivering 250W to 400W RMS at 4 Ohms.

• Crossover Tuning: Set your amplifier low-pass filter (LPF) between 60 Hz and 90 Hz to let your cabin speakers handle mid-bass while the 12-inch sub manages deep sub-bass frequencies.

Frequently Asked Questions (FAQ)

Q1: Why is a stainless steel bar grill better for a car subwoofer?

A: Stainless steel bars shield the speaker cone against heavy impacts from luggage or cargo in your boot space without causing port noise, choking acoustic energy, or rattling under intense bass vibration.

Q2: What are the benefits of the 135mm double magnet assembly?

A: Double-stacked 135mm ferrite magnets generate higher magnetic flux, keeping the voice coil centered and yielding tighter, cleaner bass hits with less thermal power compression.

Q3: What amplifier power is recommended for this 12-inch car subwoofer?

A: We recommend an amplifier capable of supplying 250W to 400W RMS at 4 Ohms (such as the 4D Furnishers V18 series).

Q: Why is a sealed 18mm MDF enclosure better than a ported box for sound accuracy?

A: An 18mm MDF sealed enclosure provides high internal damping and structural rigidity. This design controls speaker cone overshoot, keeping all bass frequencies naturally balanced without artificially boosting or peaking any specific frequency, resulting in tighter and more accurate sub-bass reproduction.