SUB QREX is a subwoofer of QREX SYSTEM, thanks to  the same frontal shape it is possible to mount them in stack or fly configuration similar to vertical array system. The configuration of the cabinet is reflex system equipped with one custom subwoofer of 460 mm (18″) with 100 mm (4″) split winding copper voice coil, 57 mm (2″) peak-to-peak. SUBQREX, owing to its linear tuning, produces a controlled low-end that goes down below 35 Hz. Multiple Speakon connection, included in the front panel, allows cardioid operation mode (total of four Speakon sockets – two on the rear and two on the front).In cardioid mode SUBQREX subwoofers achieve a controlled radiation pattern with excellent rear damping. The powering mode is only passive amplified operation with external Digital Processor.
SUBQREX is ideal product for bass frequency reinforcement for concert touring applications and can be used as extension module for low-frequency reinforcementof QREX loudspeaker . 

• 18″ Reflex Subwoofer System
• Powering Mode: Passive with external Digital Processor
• For Touring Use or Permanent Installation