CSIW SUB28 – Dual 8″ In-Wall Subwoofer

Find a Dealer

Dual 8″ in-Wall Subwoofer

The CSIW SUB28 is a premium in wall sealed cabinet subwoofer with dual 8” high performance drivers capable of delivering detailed low frequency performance. Equipped with heavy duty nylon dog-ears, and a magnetic small perforation grille, the CSIW SUB28 can be used in both new construction or retrofit applications. Versatile, and easy to deploy, the CSIW SUB28 is a cornerstone of hidden audio system design.


This product is sold individually


  • Dual 8″ Passive In-Wall Subwoofer
  • Polypropylene cone, rubber surround
  • Designed for both new construction or retrofit applications
  • Sealed Cabinet Design
  • High strength doglegs for easy installation and removal
  • Magnetic, small perforation grille
  • Design and final voicing engineered by Paul Barton
  • Ideal match with CS 500W subwoofer amplifier
  • Height : 25 3/8″ – Width: 13 1/2“ – Depth: 3 3/4“

Sound Pressure Level

Maximum @ 100HzTBD


Anechoic Chamber87dB
Listening Room89dB


Nominal4 Ohms

Acoustic Design

Woofer (Nominal)2 x 8" (100mm)

Carbon Fibre Cone

Rubber Surround

Steel Basket


Grille FaceMetal

Dimensions / Weights / Finish

DimensionsNet W - 13 1/2"* (343mm)

Net H - 25 3/8” * (625mm)

Net D - 3 3/4” * (95mm)
Shipping DimensionsNet W - 18 1/2"* (470mm)

Net H - 31 4/5” * (808mm)

Net D - 12 1/5” * (310mm)
Volume0.3 ft³
WeightNet - 26lb (12kg)

Shipping - 32.6 lb (14.8 kg)
FinishWhite Paintable Grille
Notes* Non-metric measurements are approximate.

All specifications are subject to change without notice.

Data Sheet

Dimensioned Drawings

You may also like…

This site uses cookies to provide you with the best possible experience. To learn more please view our Privacy Policy.