Mackie MR3STK Parts list

MR3STK

Monitor Series

 Coaxial design, small size and a wealth of mounting

options make the Mackie Industrial MR3STK (black)
and MR3SWTK (white) compact coaxial loudspeakers
ideal for use in business music systems.

 The woofer is a high-excursion, carbon ber design.

The dome tweeter uses an efcient Ferrouid® cooled
coil. Together they provide natural, smooth sound
reproduction and high resistance to weather.

 Installation of the MR3STK is fast and efcient using

the accompanying MA3-5 (MA3-5W, white) adjustable
mounting bracket. Two M6 and two 3/8" threaded
inserts add to the speaker's exibility. Connections
are made to recessed color-coded, spring-loaded ter­minals. Wattage taps, voltage adjustments and 4-ohm
operation are selectable by means of two detented
rotary switches. The enclosure is constructed of high
density, scratch resistant polystyrene and includes a
protective perforated steel grille and connection cover.
Available in black (MR3STK) or white (MR3SWTK).

 The MR3STK is a part of Mackie Industrial’s Monitor

Series, which includes two-way constant directivity,
compact speakers in easily installed enclosures.

 This Mackie Industrial product is covered by an

exclusive, one-time, NO FAULT repair policy in addition
to a ve year limited warranty.

Compact Coaxial Speaker

MR3SWTK

Features

 4.75" high-efciency carbon ber woofer

®

Coaxial, Ferrouid
dome tweeter

 Built-in, multi-tap constant voltage transformer
 Built-in, LICC low inductance passive crossover
 Lightweight, UV/weather resistant, high density

polystyrene, trapezoidal shaped enclosure for multiple
applications and minimum visual intrusion

 Articulated surface mount hardware

(MA3-5, black, or MA3-5W, white) included

 Integrated mounting points for use with optional

mounting hardware

 Exclusive Mackie Industrial - one-time, NO FAULT

repair policy

 Five year limited warranty

cooled, 0.5" titanium metalized

SPEAKER

MR3STK

 Foreground/Background Music
 Distributed Speech Reinforcement
 AV Production/Playback
 Near-eld Monitoring

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MR3STK

SPEAKER

Specications

System

Freq. Range (–10 dB): 140Hz–21kHz
Freq. Response (–3 dB): 180Hz–19kHz
Horz. Coverage Angle (–6 dB): 110° averaged

800Hz to 16kHz
Vert. Coverage Angle (–6 dB): 110° averaged

800Hz to 16kHz
Directivity Factor; Q (DI): 8.5 (9.3) averaged

800Hz to 16kHz
System Sensitivity

MR3STK

Rated Maximum SPL: 108 dB, @ 1m
System Nominal Impedance: 4Ω (bypassed)
System Input Power Rating
Recommended Amplier
Constant Voltage: 25V, 50V, 70V, 100V
Power Taps: 1W, 2.5W, 5W, 10W, 20W
Crossover: 6.0kHz

Transducers

Low-Frequency: 4.75" (120mm) carbon
ber woofer

High-Frequency: 0.5" (13mm) titanium metalized
dome, Ferrouid cooled

1

Compact Coaxial Speaker

: 89 dB, 1W @ 1m

:

2

35W IEC, 140W Peak

:

3

250W

Physical

Enclosure: 45° back angles, high
density polystyrene

Attachment Inserts: 2 points M6 threaded on back
2 points 3/8" threaded on top and bottom

Color: Matte black, white (MR3SWT),
scratch resistant paint

Grille: Matching perforated
steel grille

Input Connectors: Push connector plate
Dimensions (HxWxD): 8.27" x 5.91" x 5.31"

(210mm x 150mm x 135mm)
Net Weight: 5.5 lb. (2.5 kg)

Options

MA 3-6, MA 3-6W U-bracket, black (W-white)
MA-7B, MA-7W Wall-mount support bracket

(B-black, W-white)

1

Measured on axis in the far eld with 1 watt (2.00 V RMS, 4) input and referenced to 1 meter
distance using the inverse square law. Listed sound pressure represents an average from 300Hz
to 3kHz.

2

IEC Spectrum, Peak for 2 hours with +4.5 dB crest factor.

3

Recommended Amplier is a power capability value that should be taken as a guide.

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0˚

200Hz

250Hz

315Hz

400Hz

Monitor 3STK
Vertical Polars

0˚

500Hz

630Hz

800Hz

1kHz

0˚

1.25kHz

1.6kHz

2kHz

2.5kHz

0˚

3.15kHz

4kHz

5kHz

6.3kHz

0˚

8kHz

10kHz

12.5kHz

16kHz

Vertical Off-Axis Frequency Response (UP)

Vertical Off-Axis Frequency Response (DOWN)

MR3STK

Compact Coaxial Speaker

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0˚

200Hz

250Hz

315Hz

400Hz

Monitor 3STK
Horizontal Polars

0˚

500Hz

630Hz

800Hz

1kHz

0˚

1.25kHz

1.6kHz

2kHz

2.5kHz

0˚

3.15kHz

4kHz

5kHz

6.3kHz

0˚

8kHz

10kHz

12.5kHz

16kHz

Horizontal Off-Axis Frequency Response

MR3STK

Compact Coaxial Speaker

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MR3STK

Frequency response is measured on-axis at a distance referenced
back to 1m at 1-watt drive. Shown as a half space (2π) environment.

Directivity Index

Beamwidth vs. Frequency

5.31" (135mm)

TOP

2.75" (70mm)

SIDE

5.91" (150mm)

FRONT

2.5" (63.5mm)

REAR

3.62" (92mm)

8.27" (210mm)

5.31" (135mm)

3.97" (101mm)

1.34" (4mm)

1.06" (27mm)

4

5

˚

4

5

˚

Compact Coaxial Speaker

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MR3STK

SPEAKER

Architects’ and Engineers’ Specications

The two-way loudspeaker system shall be self-contained
and consist of the following components: (1) a low-frequency
driver; (2) a high-frequency dome tweeter driver that is
coaxial with the low-frequency driver; (3) a two-way crossover
network; (4) a constant voltage transformer; (5) a vented
enclosure.

The low-frequency transducer shall be a cone type
loudspeaker having a carbon ber cone with a diameter of

MR3STK

at least 4.75 inches (120mm). It shall present a nominal
load impedance of 8 ohms to the crossover network.

The high-frequency driver shall be a titanium metalized
dome tweeter having a diameter of at least 0.5 inches
(13mm). Its voice coil shall be treated with Ferrouid® to aid
in cooling.
to the crossover network.

The system shall be crossed over by an internal, high­level, passive network having a response of 12 dB/octave.
The nominal crossover frequency shall be 6kHz. The low-pass
section of the network shall have minimum inductance in
series with the low-frequency driver. A dynamic high-frequen­cy protection circuit based on a low-value, low-mass lament
resistor shall limit the current available to the high-frequency
driver. The crossover network shall present a nominal 4-ohm
load impedance to the power amplier or built-in constant
voltage transformer.

The constant voltage transformer shall have multiple
power taps at 1, 2.5, 5, 10 and 20 Watts. It shall also have
voltage taps at 25, 50, 70 and 100 volts. Two detented rotary
switches shall be provided on the input panel to adjust the
power and voltage taps of the transformer. The voltage tap
switch shall have a position to bypass the transformer and
allow the loudspeaker to present a 4-ohm load to a directly
coupled power amplier.

The enclosure shall be a vented design. It shall be
constructed using high density polystyrene and nished with
black (or white), scratch resistant paint. It shall be trapezoidal
in shape with 45° angled sides. A full size, detachable, per­forated
tant paint shall be provided. At least 4 reinforced threaded
metal sockets (3/8" and M6) for attaching optional mounting
hardware shall be provided. The overall dimensions of the
enclosure shall not exceed (HxWxD) 8.27" x 5.91" x 5.31"
(210mm x 150mm x 135mm). The total weight of the loud-

Compact Coaxial Speaker

It shall present a nominal load impedance of 8 ohms

steel grille, nished in black (or white) scratch resis-

(continued Architects’ & Engineers’ Specs)

speaker shall not exceed 5.5 lbs. (2.5 kg). Connections to the
loudspeaker shall be two color coded, spring loaded push
connectors.

The loudspeaker system shall have an overall frequency
response of at least 140Hz–21kHz when measured to –10 dB
and at least 180Hz–19kHz when measured to –3 dB. It shall
have a nominal average coverage pattern of at least 110°
horizontal by 110° vertical to –6 dB when measured between
800Hz and 16kHz. Calculated 1W/1m sensitivity shall be at
least 89 dB when measured in the far eld between 300Hz
and 3kHz. Maximum SPL shall be at least 108 dB at 1m. The
loudspeaker shall be rated for continuous operation at 35W
IEC with 140W peaks.

The two-way loudspeaker system shall be a model
MR3STK (MR3SWTK - white) manufactured by Mackie
Industrial.

Electronic les for this product available at:
www.mackieindustrial.com

SPEAKER

www.mackieindustrial.com

16220 Wood-Red Rd. NE, Woodinville, WA 98072 USA

888.337.7404, fax [phone], [e-mail]

UK +44.1268.571.212, fax [phone], [e-mail]
ITALY +39.0522.354.111, fax [phone], [e-mail]
FRANCE +33.3.8546.9160, fax [phone], [e-mail]
GERMANY +49.2572.96042.0, fax [phone], [e-mail]

This Specication Sheet MR3STK.PDF
Quick-Start Manual MR3STKQS.PDF

Mackie Designs continually engages in research related to product improvement. New material, produc­tion methods, and design renements are introduced into existing products without notice as a routine
expression of that philosophy. For this reason, any current Mackie Industrial product may differ in some
respect from its published description, but will always equal or exceed the original design specications
unless otherwise stated. ©1999-2002 Mackie Designs Inc. All rights Reserved. Mackie and the "Running
Man" gure are registered trademarks of Mackie Designs Inc. Mackie Industrial is a trademark of Mackie
Designs Inc.

part no. 910-178-10 Rev.C

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