musikelectronic geithain gmbh

RL 904

2-way-coaxial-loudspeaker in vented box

The RL 904 is an all purpose main loudspeaker for middle size or smaller audio-, video- and film production studios. Its coaxial arranged transducers ensure a sound impression with a high degree of homogeneity to a point source. The power concentration is designed for middle distance monitoring situation, at which a great differentiation in depth and a high fidelity of sound is guaranteed.

(shown veneer: american cherry nature)

RL 904

The RL 904 is an all purpose main loudspeaker for middle size or smaller audio-, video- and film production studios. Its coaxial arranged transducers ensure a sound impression with a high degree of homogeneity to a point source. The power concentration is designed for middle distance monitoring situation, at which a great differentiation in depth and a high fidelity of sound is guaranteed. Non-linear distortion remains small even at high sound pressure levels. The bass reflex system obtains a low-frequency cut-off at 40 Hz and provides a high degree of sound accuracy. We designed the whole system to achieve an optimum group delay.

The two-way MOSFET-amplifier with active crossover is situated at the back of the cabinet and is easily accessible for maintenance. An intermittent LED indicates sound pressure levels within the overload margin of 3 dB and warns of clipping. Beyond this limit the output level gets damped by 20 dB to protect the speaker’s components. To compensate their placement the speaker features two controllers to continuously adjust the low-frequency response.

There are various stands available as optional extras, which fit in the integrated appliance.

General

active two-way monitor for use in small and middle audio-, video production studios, in mobile broadcast vans, and for multi-channel and near-field purposes

Maximum SPL

106 dB / r = 1 m (3.3 ft)

Bandwidth

40 Hz ... 20 kHz ± 3 dB

Calibration:
Acoustic output level / PE = - 14 dBu

> 83 dB / r = 1 m (3.3 ft)

Directivity index
from 100 Hz ... 10 kHz


increasing from 1 to 8 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

2.5 kHz

Nominal output power MOSFET-amplifier

LF
150 Watt / 4 Ohm
HF
100 Watt / 4 Ohm
Input Connector
XLR 3F

Loudspeaker systems

Woofer
160 mm (6.5") cone
Tweeter
25 mm (1") dome

Operation and Clipping indicator

LED on front side

Power requirements

Europe 230 Volt (± 10 %), AC, 50 Hz
USA & Canada 115 Volt, AC, 60 Hz

Power consumption

max. 160 Watt at full load

Mains Connection

IEC power connector

Dimensions (H x W x D)

398 x 254 x 345 mm (15.7 x 10 x 13.6 in)

Weight

16 kg (35.2 lbs)

Temperature requirements

for use
+ 15°C ... + 35°C (59°F ... 95°F)
for storage
- 25°C ... + 45°C (-13°F ... 113°F)
humidity
45 ... 75 %

Design of the Cabinet

MDF-wood in ash black veneered, optional different veneers or colors
with holding device; optional without holding device

Floor bracket stand RL904

Floor bracket stand RL904
  • Loudspeaker rotable mounted
  • Deliverable heights (Top edge loudspeaker): 1184 mm (46.6 in), 1414 mm (55.7 in), 1544 mm (60.8 in) and 1684 mm (66.3 in)
  • Base panel (W x D): 520 mm x 450 mm (20.5 in x 17.7 in) oder 380 mm x 430 mm (15.0 in x 16.9 in)
  • Base panel and stabilisation panel veneered
  • Racks black powder-coated

Pedestal RL904

Pedestal RL904
  • Integrated cable duct in the pedestal
  • Height (Top edge loudspeaker): approx. 1109 mm (43.7 in)
  • Base panel (W x D): 275 mm x 365 mm (10.8 in x 14.4 in)
  • Pedestal veneered

Wall bracket RL904

Wall bracket RL904
  • 35° tilting und 35° rotable
  • Wall bracket black powder-coated

Ceiling bracket RL904

Ceiling bracket RL904
  • Loudspeaker rotable mounted
  • Standard height between adapter plate and bracket: 300 mm
  • other length available
  • Ceiling bracket black powder-coated

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.

Ash black (RAL9005) Ash black (RAL9005)
Ash black (RAL9005)
Ash white (RAL9010) Ash white (RAL9010)
Ash white (RAL9010)
Ash gray (RAL7035) Ash gray (RAL7035)
Ash gray (RAL7035)
Ash nature Ash nature
Ash nature
Maple nature Maple nature
Maple nature
Norway maple nature Norway maple nature
Norway maple nature
Birds eye maple nature (In short supply! Only while stocks last.) Birds eye maple nature (In short supply! Only while stocks last.)
Birds eye maple nature (In short supply! Only while stocks last.)
Birdseye maple stained (In short supply! Only while stocks last.) Birdseye maple stained (In short supply! Only while stocks last.)
Birdseye maple stained (In short supply! Only while stocks last.)
European cherry nature European cherry nature
European cherry nature
American cherry nature American cherry nature
American cherry nature
American cherry stained American cherry stained
American cherry stained
Beech nature Beech nature
Beech nature
Oak nature Oak nature
Oak nature
Oak stained P11 Oak stained P11
Oak stained P11
Oak stained P43 Oak stained P43
Oak stained P43
Alder nature Alder nature
Alder nature
Birch nature Birch nature
Birch nature
Mahogany nature Mahogany nature
Mahogany nature
American walnut nature American walnut nature
American walnut nature
Makassar nature Makassar nature
Makassar nature
Wenge nature Wenge nature
Wenge nature
Indian appletree nature (Tineo) Indian appletree nature (Tineo)
Indian appletree nature (Tineo)
rosewood nature rosewood nature
rosewood nature
Tigerwood nature Tigerwood nature
Tigerwood nature
satin walnut nature satin walnut nature
satin walnut nature
zebrawood nature zebrawood nature
zebrawood nature
Satin matt varnish in RAL color Satin matt varnish in RAL color
Satin matt varnish in RAL color
High gloss varnish in RAL color (no piano varnish) High gloss varnish in RAL color (no piano varnish)
High gloss varnish in RAL color (no piano varnish)