QSC SB-2180 – Dual 18-Inch Cinema Subwoofer

Product Overview

The QSC SB-2180 is a dual-18-inch behind-screen cinema subwoofer from the DCS Digital Cinema Series, developed to address the extended low-frequency requirements of digital cinema. It delivers substantial low-end output for a wide range of auditorium sizes.

With an enclosure depth of less than 17 inches, the SB-2180 is one of the narrowest dual-driver cinema subwoofers available, and a folded port design preserves full port length and volume while minimizing cabinet depth.

Product Description

The SB-2180 features two 18-inch (457 mm) woofers with 4-inch (102 mm) voice coils for extended-bandwidth low-frequency reproduction. A folded port design minimizes cabinet depth to less than 17 inches (432 mm) while maintaining full port length and volume, addressing tight behind-screen clearances.

Screw-type barrier-strip connectors provide secure, serviceable wiring, and rubber feet maximize isolation and minimize vibration transfer. As part of the QSC DCS ecosystem, the SB-2180 pairs with QSC cinema screen channels and surrounds. For small rooms, see the single-18-inch QSC SB-1180; for high-output rooms, the QSC SB-7218.

Key Features

• Dual 18-inch cinema woofers — Two 18-inch (457 mm) woofers with 4-inch (102 mm) voice coils deliver extended-bandwidth low-frequency output.
• Folded-port design — Minimizes cabinet depth while maintaining full port length and volume.
• Shallow enclosure — Requires less than 17 inches (432 mm) of depth behind the screen.
• Isolation rubber feet — Maximize isolation and minimize vibration transfer to the structure.
• Secure barrier-strip connectors — Screw-type barrier-strip connectors provide reliable, serviceable terminations.

Typical Applications

• Auditorium
• Broadcast studio
• Multi-purpose room

Technical Specifications

Frequently Asked Questions

What is the benefit of the folded-port design?
It keeps the cabinet shallow (under 17 inches) while maintaining full port length and volume, so low-frequency tuning is preserved in tight behind-screen spaces.

How does the SB-2180 compare to the SB-1180?
The SB-2180 uses two 18-inch woofers for higher output, while the SB-1180 is a single-18-inch design for small rooms.

How is it isolated from the structure?
Included rubber feet maximize isolation and minimize vibration transfer to the floor or platform.

What warranty and support come with this subwoofer?
QSC installed loudspeakers are covered under QSC's standard limited warranty; refer to QSC's published warranty terms for the current coverage period applicable to this model. Creation Networks provides pre- and post-sale support for system design and integration questions.