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

General: 

• 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

Motor: 

• 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

Thiele & Small Parameters: 

• 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

Recommended Enclosure: 

• Sealed Internal Volume Range: 10L to 37L / 0.35ft3 to 1.3 ft3
  
• Sealed Box Output Response (F3): 38-43 Hz

Measurement: 

• 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

Shipping Policy

DBs Car Audio is proud to offer fast & free shipping on all items listed in our store!!

Shipping Methods and Transit Times

DBs Car Audio ships orders from our Kissimmee, Florida location. On occasion, orders will be fulfilled directly by the manufacturer or distributor in order to reduce the shipping time..

Order Tracking

Once an order has been shipped, we send our customers an email with the tracking number for the order. Click on the tracking link in the email to follow the location of the package on the carrier's website. If you did not receive a tracking number by email or need to confirm the tracking information, please contact call us at 1-800-927-9390

Signature Required

Due to the valuable contents of some shipments, DBs Car Audio will only require a signature upon delivery if the order is over $500. Such guidelines will not be overruled upon the customer's request. Please understand that this is a security measure taken by our Company to ensure the safe delivery of each package and guarantee excellent service. Many of our third-party shipping carriers and payment companies require signatures upon delivery to protect against fraud and theft. Customers may request a signature upon delivery by emailing us at dbscaraudiofl@gmail.com.

Shipping Policy Disclaimer

Delivery estimates do not apply to items shipped directly from the manufacturer, nor out-of-stock items. Some items that ship from the manufacturer can only be delivered to addresses within the 48 continental states.

Standard delivery time for domestic customers will average from 2-4 business days, but can take longer in some cases. Saturday, Sunday and national holidays are not considered business days for delivery purposes.

Our Shipping Guarantee applies only to shipments delayed due to our service failure. We will not guarantee shipments that are delayed due to an act of god (ex: weather), a catastrophic event, or failure by our delivery partners. Our guarantee is also voided if incorrect billing or shipping information is given and results in your order being delayed to its destination. Our guarantee is also void if no one is available to sign for shipment when delivery attempt is made if a signature is required.