Description

DS18 PRO-X8.4BMSL
The DS18 PRO-X8.4BMSL is a premium 8-inch dual 4-ohm subwoofer engineered for car audio enthusiasts who demand deep, tight, and high-output bass in a compact size. Rated at 500 W RMS and 1000 W peak power handling, this subwoofer delivers controlled, punchy low frequencies with exceptional clarity. Its durable, high-performance construction ensures reliability for daily drivers, custom SPL builds, or small car audio systems requiring maximum bass impact. Ideal for both sealed and ported enclosures, the PRO-X8.4BMSL provides bass response down to approximately 35 Hz, making it perfect for compact setups that need strong, immersive low-end.
Specifications
| Specification | Value |
|---|---|
| Nominal Diameter | 8 Inch / 203 mm |
| Nominal Impedance | 4 Ohms |
| RMS Power Handling | 250 W |
| Max Power Handling | 500 W |
| Sensitivity (1W/1M) | 95 dB |
| Frequency Response | 80 Hz – 12 kHz |
| Recommended Hi-Pass Crossover | 120 Hz |
| Sold As | Single |
| Grill Included | No |
MOTOR & CONE SPECIFICATIONS
| Specification | Value |
|---|---|
| Voice Coil Diameter | 1.5 Inch / 38.1 mm |
| Voice Coil Former Material | Kapton |
| Winding Material | CCAW |
| Cone Material | Non-Pressed Paper |
| Bullet Material | Aluminum |
| Bullet Finish | Gloss Red |
| Surround Material | Cloth |
| Basket Material | Steel |
| Basket Finish / Color | Gloss Red |
| Magnet Material | Ferrite |
| Magnet Weight | 21 Oz |
THIELE & SMALL PARAMETERS
| Parameter | Value |
|---|---|
| Equivalent Volume (Vas) | 13.2 L / 0.468 ft³ |
| Excursion (Xmax, one way) | 1.5 mm |
| Free Air Resonance (Fs) | 100 Hz |
| Mechanical Factor (Qms) | 9.769 |
| Electrical Factor (Qes) | 0.733 |
| Total Factor (Qts) | 0.682 |
| Mechanical Mass (Mms) | 11.703 g |
| Mechanical Compliance (Cms) | 0.204 mm/N |
| BL Factor (BL) | 5.74 |
| Voice Coil Inductance (Le) | 0.214 mH |
| Cone Area (Sd) | 213.8 cm² |
| DC Resistance (Re) | 3.3 Ohms |
MEASUREMENTS
| Specification | Value |
|---|---|
| Overall Diameter | 8.23 Inch / 209 mm |
| Overall Depth | 2.96 Inch / 75 mm |
| Front Mount Baffle Cutout | 7 Inch / 180 mm |
| Mounting Depth | 2.71 Inch / 69 mm |
| Motor Diameter | 4.3 Inch / 110 mm |
Product Overview
8” Slim Mid-Range Loudspeaker with Bullet Tweeter
At just 2.71” mounting depth, DS18’s PRO-X8.4BMSL delivers full-size performance in places most drivers can’t fit.
Loud Output
This speaker’s slim mounting depth makes it perfect for doors, custom pods, or stacked wall builds. With 250W RMS / 500W MAX power handling and 95dB sensitivity, the PRO-X8.4BMSL gives you full-volume output even on limited power.
Coaxial Design
The integrated aluminum bullet tweeter boosts your highs without needing extra drivers. Paired with a stiff non-pressed paper cone, you get clean vocals and aggressive attack across the 80Hz–12kHz range.
Built for Pressure
The PRO-X8.4BMSL’s steel basket adds strength and stability, so the internal components stay rigid at high volumes. The ferrite magnet powers deeper midbass drops, and the 1.5” Kapton voice coil resists heat and distortion when you’re pushing hard.
Most slim speakers cut corners. DS18’s PRO-X8.4BMSL raises the bar.






















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