Active subwoofer Behringer PK15S 15-inch – powered PA subwoofer

Behringer PK15S is an active 15-inch subwoofer designed for PA and live sound reinforcement. This powered PA subwoofer integrates a 15" low-frequency driver with built-in amplification to produce deep bass and complement full-range speaker systems. The enclosure and driver are tuned to deliver controlled low-frequency extension suitable for small to medium venues, mobile performances, DJ setups, and band rigs.

Advantages

The integrated amplifier eliminates the need for an external power amp, simplifying setup and reducing system complexity. The 15-inch driver provides extended low-frequency response and higher output compared with smaller woofers, while the enclosure design focuses acoustic energy for tighter and more defined bass. The powered configuration ensures consistent performance across different venues and makes the unit convenient for touring or portable use.

Suitable for

• Small to medium live venues and clubs
• DJs and mobile entertainment setups
• Band rehearsal rooms and live stage monitoring support
• Corporate events, presentations and AV rental use

Key specifications

• Driver size: 15-inch low-frequency loudspeaker
• Configuration: active/powered subwoofer with built-in amplifier
• Application: PA and live sound reinforcement, low-frequency augmentation
• Enclosure: ported/tuned cabinet for extended bass response
• Connectivity: inputs and outputs for integration with full-range speakers and mixers

How to use

Place the subwoofer on a stable surface or stage floor, positioned to provide even low-frequency coverage in the listening area. Connect the line-level output from your mixer or controller to the subwoofer input using appropriate cables, then route the subwoofer output or high-pass filtered outputs to your full-range speakers as required. Power the unit from a correctly rated mains supply and set the level control and crossover (if available) to balance bass with the main speakers. Start at low volume and increase gradually while monitoring for distortion or unwanted resonance.

Usage recommendations

For best results, align subwoofer placement and crossover settings with the main speakers to avoid low-frequency overlap and phase cancellation. Use speaker stands and isolation mounts where practical, and check polarity and gain structure during soundcheck. For transport, use appropriate covers or flight cases to protect the driver and cabinet.