technical specifications QR36
Professional System 3/2005: “Highest levels over the total frequency bandwidth combined with the highest audio quality does not have to be a contradiction, as the QRs prove impressively”.

Download the complete Professional System QR36 test/review (1Mb)

  • 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
The QR36 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.

As an “array of line-sources”, a QR system acts as true cylindrical radiator, offering a 3dB SPL drop-off per doubling of distance (in the “near-field” or “Fresnel-zone”). This brings significant advantages in SPL coverage and (intelligibility) throw, from a relatively simple system.

Featuring double RBN1801 pro-ribbon drivers (patents pending), the QR36 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 “gainbefore- feedback” up to directly in front of / under the cabinet.

The Signal Integrity Sensing™ pre-wiring ensures complete cable/connector compensation between the QR36 and ALC. In this way, the ALC can be loaded down to 2 ohms, without any sacrifice on response quality (2 units QR36 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 (6000W/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 QR36 needs to be driven by an ALC controller-amplifier. Driven by the ALC, the QR36 delivers maximum sound quality with inaudible (power and excursion) protection (SDP circuit).

  technical specifications   physical specifications
Frequency Response  
+/- 3 dB   74 Hz-20.000 Hz
+/- 10 dB   53 Hz -
Sensitivity (SPL 1W/M)   100 dB
Nominal Impedance   6 ohms
Maximum RMS power (AES)   780 W
Maximum peak power (AES)   6000 W*
SPL program (nom.)   129 dB
SPL peak (nom.)   150 dB*
Dispersion H x V   90° x array length dep.
    *from 1 Khz. up
System 2-way, full-range
Filtering   passive
Drivers LF   6 x AND65/4 neodymium
6.5", vented
Driver HF   2 x RBN1801
18" pro-ribbon driver
Cross-over frequency   1000 Hz.
Connectors   2 x Speakon NL4 input/link
Physical dimensions   mm              inches
Height   1006             39.6
Width   367               14.4
Depth   237               9.3
Weight (approx.)   45 kg            (99 lb)
Warranty   6 years limited
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technical specs  
hi-res photo  
dimensional drawing  
Fresnel/Fraunhofer region QR36  
Isobaric directivity plots QR18/QR36  
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mounting options

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transport options

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