QSC AD-C.SUB-BK 6.5" Dual Small Format Ceiling Subwoofer

  • $435.00

The QSC AD-C.SUB is part of the AcousticDesign™ Series SUB/SAT loudspeaker line which are ideally suited for background music applications that require refined depth and clarity even at lower volume settings. 

The AcousticDesign Series offers integrators a premium quality installed sound solution where performance, consistent coverage, and aesthetics are paramount. Specifically designed to maintain a consistent tonal characteristic across the entire family in ceiling, surface, and pendant enclosures, the AcousticDesign Series allows integrators seamless transitions within blended installations. 

The AcousticDesign Series SUB/SAT loudspeakers have been specifically designed to be mix-and-match capable. Any combination of satellites may be paired with any subwoofer in the SUB/SAT line. 

The AD-C.SUB features a high quality 6.5-inch weather treated paper cone woofer on a dual voice coil for improved thermal dissipation and higher output within a small form factor. 

The accurate frequency response of the AD-C.SUB is maintained even in 70 / 100 V applications by use of a low-loss, lowsaturation 100 W transformer with selectable taps, including 4 O bypass, using a rotary selector located under the snap-fit magnetically attached powder coat steel grille. 

The AD-C.SUB includes built-in high-pass filtered outputs for connecting up to four AcousticDesign SUB/SAT satellite loudspeakers. This feature greatly reduces system setup, amplifier channel count, and allows for ease of wiring. 

The inputs and outputs are located behind a removable conduit cover plate with captive screws to prevent loss during installation. All in-thru and outputs are terminated to locking 4-pole Euroblock style connectors capable of 12AWG (2 mm) wire thickness. 

To retain their stylish aesthetics, the rugged ABS baffle is further protected by using UV inhibitors that prevent discoloration and by a powder coated steel back can. The magnetic grille features a stick-on logo that can be removed blemish-free for installations where branding is not permitted. 

Installers will appreciate the 4x double stepped, long travel dog-ear blind mounting system, which captures from 0 - 2 in of ceiling thickness. 

Intrinsic Correction™ voicings that optimize performance and speed the install process are easily deployed via the MP-M Series music and paging mixers as well as Q-SYS Platform, including CXD-Q Series amplifiers, as part of a complete QSC systems solution. 

The AD-C.SUB is available in QSC standard black (RAL 9011) or white (RAL 9010) and may be painted to match any decor. 

For your system integration needs, complete EASE, CF2, CAD, and BIM files are available for download at QSC.com.


  • Consistent tonal characteristics across the entire AcousticDesign Series for surface, ceiling, and pendant applications
  • Refined depth and clarity even at low volume settings
  • Mix-and-match capable, any subwoofer with any satellite in the AD Series SUB/SAT line
  • Dual voice coil for improved thermal dissipation and higher output
  • Low-saturation and low-loss 70 / 100 V transformers with 4 Ohm bypass
  • Snap-fit magnetic grill
  • 4x built-in high-pass filtered outputs
  • Locking 4-pole Euroblock connectors
  • Removable conduit cover plate
  • Blemish-free removable logo
  • 4x double stepped, long travel dog-ear blind mount system
  • Intrinsic Correction™ voicings available via MP-M Series mixers and the Q-SYS Platform, including CXD-Q Series amplifiers
LF transducer 6.5-inch (165 mm) dual voice-coil weather treated paper cone woofer
HF transducer N/A
Effective frequency range 45 Hz – 150 Hz
Rated noise power / voltage 6 100 W / 20 V (rms)
Sensitivity [dB] (rated @ 1 W, 1 m) 86
Coverage (-6 dB) [°] Omni
Directivity factor TBD
Directivity index [dB] TBD
Maximum SPL [dB] (continuous / peak) 100 / 106
Recommended amplifier 100 W
Transformer taps / impedance Bypass: 4 Ohm

100 W (70 V); NA (100 V) Tap: 50 Ohm

0 W (70 V); 100 W (100 V) Tap: 100 Ohm

25 W (70 V); 50 W (100 V) Tap: 200 Ohm

12.5 W (70 V); 25 W (100 V) Tap: 400 Ohm

Connector Mono input: 4-pole Euroblock with thru output

Hi-pass mono output: 2x 4-pole Euroblock for 4x satellites

Enclosure material ABS baffle on powder coated steel back can
Grille material Powder coated steel
Ingress protection IP-34
Operating environment Designed for indoor use
Operating temperature range -4 to 122° F (-20 to 50° C)
Shipping Weight 11.9 Lbs
Safety Agent UL1480, UL2043, NFPA90, NFPA70 suitable for use in air handling spaces. Transformer UL registered per UL1876, ROHS, CE compliant. Baffle meets UL94-V0 and UL94-5VB flamibility rating; in accordance with IEC60849 / EN60849 systems.
Included (1) QSC AD-C.SUB , C-ring and tile rails, rail screws, (3) euroblock connector, cut-out template, grill, user manual