QSC CS18 Compact Powered Subwoofer With Bluetooth, 18 Inches

QSC CS18 18-Inch Compact Powered Subwoofer

The QSC CS18 powered subwoofer delivers bass reinforcement through an 18-inch cone driver and 2600 W peak Class D amplification. Designed for portable sound systems, it combines Bluetooth audio, wireless app control, and onboard presets. DEEP extends low-frequency output, while a cardioid preset supports directional configurations with two or more units.

DJs, bands, mobile entertainers, and production crews can use this active subwoofer for event sound reinforcement. It also serves houses of worship and small installations requiring dedicated bass support. For buyers building a mobile DJ speaker system or expanding a live band PA, rear-panel adjustments simplify setup. Wireless access through the QSC Loudspeaker Control app allows settings changes from a phone.

Locking combination inputs accept XLR or 1/4-inch connections, and separate outputs accommodate signal routing to additional equipment. The painted birch plywood cabinet includes an M20 threaded socket for compatible loudspeaker poles. Optional casters support transport between venues. Cardioid deployment directs more bass forward and reduces rearward radiation when configured correctly. QSC offers six-year warranty coverage with registration within 30 days of purchase.

Key Features

• Powered Bass Reinforcement: An integrated Class D amplifier supplies 2600 W peak power to the 18-inch driver.
• DEEP Preset: Extended bass operation reaches 35 Hz at the specified -10 dB limit.
• Cardioid Configuration: A dedicated preset supports directional bass deployment using at least two subwoofers.
• Wireless Playback: Bluetooth audio includes True Wireless Stereo capability for stereo pairing.
• App-Based Adjustment: Wireless control provides access to settings through the QSC Loudspeaker Control app.
• System Connectivity: Dual combination inputs work alongside loop-through and processed XLR outputs.
• Deployment Hardware: A threaded pole socket and compatibility with an optional caster kit support flexible setup.

Technical Specifications

• Model: CS18
• Configuration: Direct-radiating powered subwoofer
• Low-Frequency Driver: 18-inch cone
• Amplifier: Class D, 2600 W peak
• Maximum Rated Sound Pressure Level: 134 dB, measured at 1 meter on-axis using IEC268 pink noise
• Frequency Response (-6 dB): 46-96 Hz; DEEP: 39-96 Hz
• Frequency Range (-10 dB): 40-103 Hz; DEEP: 35-103 Hz
• Coverage: Omnidirectional or cardioid; cardioid requires at least two units
• Wireless Audio: Bluetooth with True Wireless Stereo
• Wireless Control: QSC Loudspeaker Control app
• Cooling: Convection
• Controls: Power switch, gain adjustment, two selection buttons
• Indicators: One power LED, one limiter-active LED, one input-system LED, two signal LEDs
• Inputs: Two locking female XLR/1/4-inch combination connectors
• Outputs: Two male XLR connectors: one loop-through and one post-DSP (digital signal processing)
• Power Connection: IEC connector
• AC Supply: Universal, 100-240 VAC, 50/60 Hz
• Current Draw at 1/8 Power: 2.7 A at 100 VAC; 2.2 A at 120 VAC; 1.1 A at 240 VAC
• Cabinet Material: Birch plywood, approximately 0.5-0.6 inches thick
• Color: Black, RAL 9011
• Grille: Black powder-coated 16-gauge steel
• Pole Mount: M20 threaded socket
• Dimensions (H x W x D): 25.2 x 20.2 x 25.9 inches
• Net Weight: 82.9 pounds
• Shipping Weight: 98.3 pounds
• Regulatory Listings: CE, CB, cTUVus, FCC, NOM, PSE, KCC, BSMI, RCM, RoHS 3.0, WEEE
• Optional Accessories: CASTER KIT-S, CS18-CVR, SP-16X, SP-26, SP-36
• Warranty: Six years when registered within 30 days of purchase

What's In the Box

• One CS18 subwoofer in a protective poly bag
• One AC power cord
• Two white QSC logo stickers
• Limited warranty document
• Quick start guide
• Powered loudspeaker safety sheet