• RBN1801 pro-ribbon HF drivers with exceptional intelligibility and high SPL output
  • All Neodymium drivers for excellent performance-to-weight ratio
  • Modular scalable array system, with multiple units flown or stacked above each other
  • SIS pre-wired for very high damping and further reduced distortion (with ALC)
  • Extended headroom/SPL and protection in combination with SDP modules (with ALC)
  • Passive filtering for easy operation and economical powering


QR18 The QR18 is a modular 2-way column loudspeaker to be used as vertical array, either in stacked or flown configuration, for both permanent and (limited) portable installations. It combines the ease-of-use handling of a conventional system, with the throw of a line-array system. 

Featuring a single RBN1801 pro-ribbon driver (patents pending), the QR18 offers Real-90 horizontal dispersion with seamless coverage; Its transient response and high peak power handling enable an amazing intelligibility and throw.

The 91% active frontal radiation, in combination with the ribbon’s all-natural cylindrical flat (Isophasic) wavefront, brings maximum “gain-before-feedback” up to directly in front of / under the cabinet.

The Signal Integrity Sensing™ pre-wiring ensures complete cable/connector compensation between the QR18 and ALC. In this way, the ALC can be loaded down to 2 ohms, without any sacrifice on response quality (4 units QR18 parallel on one channel loads 3 ohms).

The system includes dedicated filtering, but system equalizing is done remotely (electronically) fully utilizing the individual speaker components’ power capacity; In combination with the unusual high peak power handling (3000W/200mS), this results in a virtually infinite headroom SPL from 1kHz. up.

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

For full system performance, the QR18 needs to be driven by an ALC controller-amplifier. Driven by the ALC, the QR18 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 3000 W – from 1 kHz up
SPL program/peak (nom.) 123dB / 144dB
Dispersion H x V (array) 90° x depending on array length

Physical Specifications

System 2-way, full range
Filtering passive
Drivers LF 3 x AND65/4 neodymium 6.5″, vented
Driver HF 1 x RBN1801 – 18″ pro ribbon driver
Cross-over frequency 1000 Hz
Connectors 2 x Speakon NL4 input / link
Physical dimensions mm
Height 506
Width 367
Depth 237
Weight (approx.) 20kg
Warranty 6 years limited


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