RL 933K

3-way-coaxial-loudspeaker with cardioid characteristic in bass range

The RL933K has been designed for both the professional user at medium-size audio, video and film studios and for the discerning music enthusiast.

RL 933K

The RL933K has been designed for both the professional user at medium-size audio, video and film studios and for the discerning music enthusiast.

By the cardioid radiation characteristics within the frequency range from 35 through 250 Hz the reflections on the back walls of listening rooms can be minimised. In addition the transfer characteristic can be matched to the acoustical conditions of the reproduction room as well as to the set-up situation by an integrated room matching filter.

The total directivity index of the monitor was optimised for middle through larger listening distances between two and three metres. As the bass system a very linear 260 mm (10’’) long throw driver in a cardioid cabinet is employed, delivering excellent impulse fidelity. The 125 mm (5’’) cone is mounted together with the 25 mm (1’’) dome tweeter coaxially in front of the bass system allowing a precise steering of the focal perspective. As a result a realistic and steady spatial performance of the sound image around the listening position is achieved, with high homogeneity and smallest possible colouration. By the great membrane area the RL933K is in the highest degree level proof while at the same time it has the lowest distortions. Therefore the RL933K is a precision studio tool allowing fatigue free working for hours.

The three-channel MOSFET power amplifier with electronic crossover is integrated within the back wall of the cabinet and is hinged for service purposes. An intermittent LED lighting signals when the overload limit is reached. After crossing of the maximum level the output level will be reduced by 20 dB to avoid any overloading of the components.

The RL933K1 is a more compact cabinet variant of the RL933K, that is employed when not enough room is available. Be it a video wall or an outside broadcasting van. As an alternative to the standardly provided MOSFET amplifier in an upright standing enclosure the 19’’ compatible Class D amplifier RL-Amplifier is also available.

A variety of special stands and racks is available as accessories. According fixing elements have been integrated into the loudspeaker cabinet.

General

Active 3-way coaxial loudspeaker for listening distances between 2 and 3 m (6.6 ft and 9.9 ft)

Maximum SPL
from 100 Hz ... 6 kHz


112 ... 121 dB / r = 1 m (3.3 ft)

Bandwidth

35 Hz ... 20 kHz ± 3 dB

Calibration:
Acoustic output level / PE = - 14 dBu

89 dB / r = 1 m (3.3 ft)

Directivity Index
from 100 Hz ... 10 kHz

Increasing from 3 to 10 dB

Inherent noise sound level

≤ 7 dB (A) / r = 1 m (3.3 ft)

Total harmonic distortion
measured at 96 dB / r = 1 m (3.3 ft)
from 100 Hz ... 10 kHz



≤ - 40 dB

Nominal input level

+ 6 dBu adjustable

Input impedance

≥ 10 kOhm RC balanced

Electronic crossover frequencies

700 Hz and 3.2 kHz

Nominal output power amplifier

LF
180 W / 4 Ohm
MF
100 W / 4 Ohm
HF
100 W / 4 Ohm

Input connector

XLR 3F

Loudspeaker systems

Woofer
260 mm (10") cone
Mid-range unit
125 mm (5") cone
Tweeter
25 mm (1") dome

Operation and clipping indicator

LED on front side

Power requirements

230 V ~ ± 10 %; 50 ... 60 Hz
115 V ~ ± 10 %; 50 ... 60 Hz (optional)
100 V ~ ± 10 %; 50 ... 60 Hz (optional)

Power consumption

Max. 300 VA at full load

Mains connection

IEC power connector

Temperature requirements

for use
+ 15°C ... + 35°C
for storage
- 25°C ... + 45°C
humidity
45 ... 75 %

RL 933K (Amplifier in loudspeaker cabinet)

Dimensions (h x w x d)

477 x 350 x 310 (18.8 x 13.8 x 12.2 inch)

Weight

30 kg (66 lbs)

Design of the cabinet

MDF wood in ash black veneered; optional other veneers or colours
with holding device; optional without holding device
with handles; optional without handles

RL 933K1 (Amplifier in separate enlosure)

Connection cable
Loudspeaker - Amplifier enclosure

Speakon NL8
Standard length 3 m (9.9 ft); optional other lengths

Dimensions (h x w x d)

Loudspeaker
350 x 350 x 305 (13.8 x 13.8 x 12 inch)
Standard amplifier enclosure
475 x 279 x 120 (18.7 x 11 x 4.7 inch) without base plate
Highend amplifier enclosure
495 x 320 x 260 (19.5 x 12.6 x 10.2 inch) with base plate

Design of the cabinet

Loudspeaker
MDF wood in ash black veneered; optional other veneers or colours
with holding device; optional without holding device
Standard amplifier enclosure
MDF wood with scratch proof structure coating black RAL9005; optional other colours
Highend amplifier enclosure
MDF wood in ash black veneered; optional other veneers or colours

Floor bracket stand

  • Loudspeaker rotable mounted
  • Deliverable heights (Top edge loudspeaker): 1285 mm (50.6 in), 1400 mm (55.1 in), 1540 mm (60.6 in) and 1750 mm (68.9 in)
  • Base panel (W x D): 470 mm x 450 mm (18.5 in x 17.7 in)
  • Base panel and stabilisation panel veneered
  • Racks black powder-coated

Pedestal

  • Integrated cable duct in the pedestal
  • Height (Top edge loudspeaker): approx. 1125 mm (44.3 in)
  • Base panel (W x D): 400 mm x 370 mm (15.7 in x 14.6 in)
  • Pedestal veneered

Standard veneer ash black (RAL9005), optional veneers and optional colours

We offer our loudspeakers in standard veneer ash black (RAL9005) or for an additional charge in different optional veneers respectively optional colours. This website provides an overview on the optional veneer and lacquer styles. We are pleased to check if your desired individual veneer and colour can be realised.

Important information about deviations from sample pattern

Wood is a natural product. Even the most thorough manufacturing can result in deviations in colour or structure and is no cause for complaint.
Images are represented differently on every screen and hence not colour-proof.