The QSC AD-S.SUB passive PA subwoofer features a 6.5-inch (165 mm) woofer and a frequency response of 45–150 Hz. Maximum sound pressure level reaches 100 dB continuous and 106 dB peak.

Connections are made via Euroblock inputs and outputs. The cabinet is made of ABS, and the grille is powder-coated steel. It is designed for indoor use and operates at temperatures from -20 to 50 °C.

• Type: Passive PA subwoofer
• RMS power: 100 W
• Woofer: 6.5 inches (165 mm)
• Frequency response: 45–150 Hz
• Sensitivity: 86 dB (1 W, 1 m)
• Maximum sound pressure level: 100 dB continuous / 106 dB peak
• Impedance: 70 V: 100, 50, 25, 12.5 W (mono only); 100 V: 100, 50, 25 W (mono only); bypass: 4 Ω mono or 8 Ω + 8 Ω stereo
• Connections: Mono Hi-Z input with pass-through output via 4-pin Euroblock, Low-Z input via 4-pin Euroblock for left (mono) and right channels, 2 mono high-pass filter outputs via 4-pin Euroblock for 4 satellite speakers
• Cabinet material: ABS
• Grille material: Powder-coated steel
• Ingress protection: IP-34
• Operating temperature range: -20 to 50 °C
• Dimensions: 35 × 20.9 × 43.2 cm
• Weight: 10.7 kg
• Colour: White
• Quantity: 1 piece