PS Shallow-Mount Water-Resistant 8" Subwoofer | 400W RMS DVC 4-Ohm
Product Overview
DS18 PSW8.4D
8” Dual Voice Coil Shallow-Mount Subwoofer – 400W RMS / 800W MAX
The PSW8.4D is a shallow-mount 8” subwoofer engineered to deliver serious low-end punch in minimal space.
Tight Spots and Deep Drops
With a mounting depth of just 3.5 inches and a total depth of 4”, the PSW8.4D fits clean into under-seat boxes, truck enclosures, and other compact builds but reaches frequencies as low as 20Hz
Dual 4-Ohm Voice Coils for Flexible Wiring
Wired in series or parallel, the dual 4-ohm voice coils give you options for system matching and amp tuning. That means more control over your setup and more reliable performance under pressure.
Hit Hard and Stay Cool
A 2" aluminum voice coil and water-resistant paper + aluminum cone allow for better heat dissipation and long-lasting performance. The ferrite motor and high-roll rubber surround deliver strength and stability for extended play at high volume.
Tuned for Accuracy
With a sensitivity of 81dB and an optimal sealed box volume of 0.35–1.3 ft³, the PSW8.4D balances deep bass with tonal precision.
Bring the boom to any mounting space with DS18’s PSW8.4D!
Key Features
- Shallow-mount 8” subwoofer designed for tight installations
- Dual 4-ohm voice coils for flexible system wiring
- 400W RMS / 800W MAX power output
- Water-resistant paper cone with aluminum reinforcement
- 3.5” mounting depth ideal for compact enclosures
Specifications
| Nominal Diameter | 8" / 203mm |
|---|---|
| Nominal Impedance | 4 + 4 Ohms |
| RMS Power Handling | 400W |
| MAX Power Handling | 800W |
| Sensitivity (1W/1M) | 81 dB |
| Frequency Response | 20-300 Hz |
| Recommended Low-Pass Crossover | 100 Hz |
| Voice Coil Diameter | 2" / 50.8mm |
| Voice Coil Former Material | Aluminum |
| Winding Material | Copper |
| Cone Material | Water-resistant paper with aluminum reinforcement |
| Surround Material | Rubber |
| Magnet Material | Ferrite |
| Magnet Weight | 38 oz |
| Displacement Volume | 0.5 L / 0.017 ft3 |
| Basket Material | Steel |
| Basket Finish | Matte Black |
| Equivalent Volume (Vas) | 9.38 L / 0.33 ft3 |
| Excursion (Xmax, one way) | 8.5 mm |
| Free Air Resonance (Fs) | 42 Hz |
| Mechanical Factor (Qms) | 4.08 |
| Electrical Factor (Qes) | 1.06 |
| Total Factor (Qts) | 0.84 |
| Moving Mass (Mms) | 98.43 g |
| Compliance (Cms) | 141.08 mm/N |
| BL Factor | 12.61 |
| Voice Coil Inductance (Le) | 1.83 mH |
| Diaphragm Area (Sd) | 216 cm2 |
| DC Resistance (Re) | 3.2 + 3.2 Ohms |
| Efficiency Bandwidth Product (EBP) | 39.6 |
| Sealed Internal Volume Range | 10L to 37L / 0.35ft3 to 1.3 ft3 |
| Sealed Box Output Response (F3) | 43-38 Hz |
| Overall Diameter | 8.6" / 220mm |
| Overall Depth | 4" / 102mm |
| Front Mount Baffle Cutout | 7.5" / 191mm |
| Mounting Depth | 3.5" / 90mm |
| Motor Diameter | 5.27" / 134mm |