Mackie MR3STK User manual

The MR3STK (Black) and MR3SWTK (White)
are a compact two-way coaxial speaker system
featuring a built-in multi-tap constant voltage
transformer, with two detented rotary switches
for selecting wattage taps (constant voltage) or
4Ω(constant impedance) operation. The
4.75" carbon fiber woofer, in combination with
a coaxial 0.5" titanium metalized dome
tweeter, provide natural, smooth sound
reproduction, ideal for use in business music
systems and indoor/outdoor background
music applications.
The passive crossover is designed to reduce
heat dissipation and optimize the power
response of the loudspeaker. Connections are
made to recessed, color-coded spring-loaded
terminals.
The enclosure is constructed of high-
density polystyrene, with integrated mounting
points for use with the optional mounting
hardware, and includes a protective
perforated steel grille.
Safety First!
Before connecting and using the
equipment, please read this Quick-Start Guide
carefully and keep it for future reference.
WARNING! This equipment has been
designed to be installed by qualified
professionals only! There are many factors to
be considered when installing professional
sound reinforcement systems, including
mechanical and electrical considerations, as
well as acoustic coverage and performance.
Mackie Industrial strongly recommends that
this equipment be installed only by a
professional sound installer or contractor.
Physical:
Enclosure:
45°back angles, high density
polystyrene
Attachment Inserts:
4 integrated threaded insert points
Color: Matte black (MR3STK)
White (MR3SWT)
Grille: Matching perforated steel grille
Input Connectors:
Spring-loaded terminal
Dimensions HxWxD:
8.27 in x 5.91 in x 5.31 in
(210 mm x 150 mm x 135 mm)
Net Weight:
5.5 lb (2.5 kg)
Options:
MA3-5 (MA3-5W):
Articulated surface mount
Black (White)
MA3-6 (MA3-6W):
U-bracket
Black (White)
MR3STK/MR3SWTK
Specifications
MONITOR MR3STK/SWTK
Compact Coaxial Speaker
Quick-Start Guide
System:
Freq. Range (–10 dB):
140Hz-21kHz
Freq. Response (–3 dB):
180Hz-19kHz
Horz. Coverage Angle (–6 dB):
110°, averaged 800Hz-16kHz
Vert. Coverage Angle (–6 dB):
110°, averaged 800Hz-16kHz
Directivity Factor Q (DI):
8.5 (9.3), averaged 800Hz-16kHz
System Sensitivity 1:
89 dB, 1W@1m
Rated Maximum SPL:
108 dB @ 1 m (3.3 ft) peak
Rated Nominal Impedance:
4Ω(bypassed)
System Input Power Rating 2:
35W IEC, 140W Peak
Constant Voltage:
25V, 50V, 70V, 100V
Power Taps:
1W, 2.5W, 5W, 10W, 20W
Crossover Frequency:
6.0kHz
Transducers:
Low Frequency:
4.75" (120 mm) carbon fiber woofer
High Frequency:
0.5" (13 mm) titanium metalized
dome tweeter, Ferrofluid cooled
1Measured on-axis in the far field with 1 watt
(2.00V RMS @ 4Ω) input and referenced to 1 meter
distance using the inverse square law. Listed sound
pressure represents an average from 300Hz to 3kHz.
2IEC Spectrum, peak for 2 hours with +4.5 dB crest
factor.
www.mackieindustrial.com
16220 Wood-Red Road NE, Woodinville, WA 98072 USA
TEL [phone], FAX [phone], [e-mail]
UK +44.1268.571.212, FAX [phone] [email protected]
ITALY +39.0522.354.111, FAX [phone] [email protected]
FRANCE +33.3.8546.9160, FAX [phone] +rcf.commerc[email protected]
GERMANY +49.2572.96042.0, FAX [phone] [e-mail]
Part No. 910-178-20 Rev. B 4/01
© 2001 Mackie Industrial. All Rights Reserved. Printed in the USA.

Rear Panel Features
and Controls
1. This rotary control selects the power tap
for the internal constant voltage
transformer. Choices are 1W, 2.5W, 5W,
10W, 20W, and BYPASS (used for 4Ω
operation).
2. This rotary control selects the constant
voltage distributed system in which the
speaker is used. Choices are BYPASS
(used for 4Ωoperation), 0(Off), 25V, 50V,
70V, and 100V.
Note: Use a slot-head screwdriver to
adjust the rotary controls.
3. Use these spring-loaded terminals to
connect the speaker wiring.
Installation
The MONITOR MR3ST can be mounted using
the optional mounting brackets. These include
the following:
MA3-5 Articulated surface mount
MA3-6 U-bracket
WARNING: Consult a professional rigger or
structural engineer prior to suspending
loudspeakers from a structure not intended
for that use. Always know the working load
limit of the structure supporting the
loudspeaker array. Always make sure that
the rigging hardware minimum rating is at
least five times the actual load.
Connections
The spring-loaded speaker terminals are
designed to accept bare wire, up to a
maximum of 18 gauge. Strip 1/4” of insulation
off the end of the speaker wire, press in the
tab, and insert the bare wire into the hole.
When you release the tab, the wire is locked in
place. Make sure there are no stray strands of
wire outside the terminal connection.
INPUT
25V 50V 70V 100V GND
OUTPUTS
POWER AMPLIFIER
+– +–
+–+–
OUTPUTS
POWER AMPLIFIER
– + – +
LR
70V Connection
4 Ohm Stereo Connection
+–
INPUT
Hookup