• Modular scalable low-mid array system, with multiple units flown or stacked above each other
  • Neodymium drivers for excellent performance-to-weight ratio
  • SIS pre-wired for very high damping and further reduced distortion (with ALC)
  • Passive filtering for easy operation and economical powering
  • Durotect™ scratch-resistant coating


QR18 The QM18 is a modular, limited bandwidth loudspeaker to be used as vertical low-mid array, either in stacked or flown configuration, for both permanent and (limited) portable installations. It is designed as low-mid extension of a QR-array.

The QM18 “array in-fill” module is applied in a multiple QR-array, where the direct HF reproduction/projection of a QR is not required, but where an uninterrupted LMF line-source array is desirable for extended frequency control. The tightly spaced mid-bass transducers are fully compliant with the laws of line-array behaviour. The Signal Integrity Sensing™ pre-wiring ensures complete cable/connector compensation between the QM18 and ALC. In this way, the ALC can be loaded down to 2 ohms, without any sacrifice on response quality (4 units QM18 parallel on one channel loads 3 ohms).

Typical applications for the QM-systems include “array in-fill” to a QR main system for theatre, PA system in “acoustically challenging rooms”, as well as high power side-fill stage monitoring.

For full system performance, the QM18 needs to be driven by an ALC controller-amplifier. Driven by the ALC, the QM18 delivers maximum sound quality with inaudible (power and excursion) protection (SDP circuit).

Dimensional Drawing »

Technical Specifications

Frequency Response
+/- 3 dB 74 Hz – 20.000 Hz
+/- 10 dB 53 Hz –
Sensitivity (SPL 1W/M) 97 dB
Nominal Impedance 12 ohms
Maximum RMS power 390 W
Maximum peak power 1500 W
SPL program/peak (nom.) 123dB / 129dB
Dispersion H x V (array) 90° x depending on array length

Physical Specifications

System limited bandwidth
Filtering passive
Drivers LF 3 x AND65/4 neodymium 6.5″, vented
Cross-over frequency 1000 Hz
Connectors 2 x Speakon NL4 input / link
Physical dimensions mm
Height 506
Width 367
Depth 237
Weight (approx.) 14kg
Warranty 6 years limited