Tropo 18 Inch D4 (Used - Working)

$111.99 Regular price $159.99 Sale price

You Save 30% ($48.00)



The item was tested and it is working. There may be cosmetic damage, small scratches, dents, and/or damage to the gift box. If for some reason the item is not working, you have 30 days from the date of purchase to notify us. We will ask you to return the item (with the packaging received) back to us. Once we verify it is the item and it is not working, we will issue you a store credit only. If we discover the item is working, we will not issue a refund and will offer to return the item to your address at your cost.

Introducing the colossal Tropo 18 Inch Subwoofer D4 by none other that CT Sounds. To experience real time SPL at a greatly affordable price, this subwoofer just has got it. Enormous 3" D4 voice coil in the core of this subwoofer has been a great improvement to the Tropo series subwoofers. For those with larger concerns in their car audio while looking at their expenses, Tropo 18" D4 is just an excellent option!


Whats in the box:

  • 1 x Tropo 18" D4 Car Subwoofer (Dual 4 ohm)


  1. It is a dual 4Ω (ohm) resistive (voice coil) subwoofer
  2. This is a 600W (RMS) car audio subwoofer with 1200W max power
  3. 3" (diameter) voice coil makes this product versatile irrespective of its size, dimensions and power consumption
  4. It incorporates with Y35 graded ferrite magnet! The magnet is safely kept inside a firm and strong casing & is attached to the sub basket
  5. Strong and sturdy basket frame capable of handling high-powered audio-frequency production without any harm to the product!

Technical Specifications:

  1. Sub power: 600W (RMS) | 1200W (MAX) 
  2. Subwoofer size: 18"
  3. Subwoofer type/ impedance: Dual 4 ohm
  4. Voice coil (diameter): 3" (76.2mm)
  5. Fo: 25.782Hz
  6. QTS: 0.571
  7. QES: 0.649
  8. QMS: 4.15
  9. VAS: 197.420 liters
  10. SPL: 89.0 dB (@1w/1m)
  11. Xmax: 12.5mm (One way)
  12. Displacement: 0.15 ft3

Box Specifications:

  1. Sealed: 5.00 ft3
  2. Ported: 4.50 ~ 5.00 ft3

Mounting / Installation Parameters:

  1. Cutout diameter: 419mm / 16.5"
  2. Overall diameter: 460mm / 18.1"
  3. Mounting depth: 198mm / 7.8"

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