Mackie SRM 450 Brochure

SRM450

Active Speaker System

5

O F 6 P A G E S

SRM450

Active Speaker System www.mackie.com

16220 Wood-Red Road NE, Woodinville, WA 98072 USA

888.337.7404, fax 425.487.4337, [email protected]

UK +44.1268.571.212, fax +44.1268.570.809, [email protected]

ITALY +39.0522.354.111, fax +39.0522.926.208, [email protected]

FRANCE +33.3.85.46.91.60, fax +33.3.85.46.91.61, [email protected]

GERMANY +49.2572.96042.0, fax +49.2572.96042.10, [email protected]

LOUD Technologies continually engages in research related to product improvement. New material, production methods, and design refinements are introduced into existing products without notice as a routine expression of that philosophy. For this reason, any current LOUD Technologies product may differ in some respect from its published description, but will always equal or exceed the original design specifications unless otherwise stated. ©1999-2004 LOUD Technologies Inc. All rights reserved. Mackie and the “Running Man” figure are registered trademarks of LOUD Technologies Inc.

Part No. 091-221-00 Rev. B 09/04

6

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SRM450

 The Mackie SRM450 is a full range, portable, active loudspeaker system providing high output, wide dispersion, and low distortion performance in a compact, composite molded enclosure. Two amplifiers independently power a high precision 12-inch professional woofer and

1.75-inch diaphragm titanium compression driver with a

1-inch exit throat. A sophisticated electronic control system provides phase correction, crossover, and five modes of thermal and active system protection.

 The SRM450 is fitted with a specially designed horn assembly that combines both an exponential and conical geometry. With the addition of a multi-cell horn throat aperture, the complete assembly provides unparalleled dispersion characteristics. The result is super smooth, lowdistortion linear audio performance across the entire specified coverage angle of 90 degrees.

 A servo feedback circuit has been added to the lowfrequency amplifier in order to provide extended bass response and woofer control. This design provides simultaneous positive and negative signal feedback information from the woofer’s magnetic circuit to the low-frequency amplifier. This loop locks the two devices together and provides extreme control of the woofer mass. The result is extended linear movement of the woofer cone resulting in very high SPL low-frequency output levels.

 Careful attention has been given to the ergonomic features of the system. The center of gravity, handle locations, handle design, position of fly-points, and ease of use have been carefully thought out. There is also an integrated pole mount on the bottom of the cabinet and a weather-resistant steel grille. The asymmetrical trapezoidal cabinet has been designed to provide an ideal floor monitoring position.

 The SRM450 features a number of unique control features including a single microphone and line-level control in addition to a high-pass filter for floor monitoring applications, an AC timed turn off function that is ideal for fixed or remote installations, and a contour switch for low-level or background-level sound reinforcement applications.

 The SRM450 cabinet is constructed of high pressure injected polypropylene. The enclosure features ample amounts of reinforcement ribbing and structural strengthening resulting in a strong, super-rigid design providing ideal acoustical characteristics.

SRM450

Active 2-Way Sound

Reinforcement Speaker System

Features

Bi-amplification with 300 watts rms low-frequency and 100 watts rms high-frequency power

127 dB peak SPL

Wide dispersion, studio-quality high-frequency horn with multi-cell aperture throat

Large format exponential/conical high-frequency horn mouth

State-of-the-art precision 1.75-inch titanium compression driver

Servo feedback controlled 12-inch high-efficiency, light mass woofer

Single mic/line level control

High-pass switch for floor monitoring applications

Contour switch provides ideal low to medium level music playback equalization

Timed turn-off AC switch

Complete electronic and component protection circuitry

Electronic equalization and phase alignment

Professional trapezoidal enclosure design

Built-in pole mount cup on bottom

Tilts on its side for use as a stage monitor

Correctly weight-balanced with two comfortable side handles for easy carrying and set up

Applications

 Live and playback applications

 Small to medium sized portable PA systems

 Corporate events

 Houses of worship

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SRM450

Active Speaker System

SRM450 Specifications

System Acoustic

Frequency Response (–3 dB) 55 Hz-18 kHz

Frequency Range (–10 dB) 45 Hz-20 kHz

Directivity Factor; Q (DI) 9.95 (9.98), averaged

2 kHz to 10 kHz

Max SPL Long-term 124 dB

Max SPL Peak 127 dB

Crossover Linkwitz-Riley, 24 dB/octave @ 1600 Hz

Low Frequency Section

Number of Drivers

Woofer Diameter

Voice Coil Diameter

Power Handling

Sensitivity

Frequency Range

Magnet Type

Audio

Input Bal./unbal. Female XLR

Loop-through (parallel w/input) Bal./unbal. Male XLR

Input Protection RFI and level protected

Level Control Rotating knob (off to +40 dB)

Sensitivity (center detent) Line: +4 dBu

Mic: –36 dBu

Maximum Input Level +22 dBu

Low-Cut Frequency 75 Hz

second-order high-pass filter

Acoustic Contour Equalization (peaking) +3 dB @ 100 Hz

+3 dB @ 12 kHz

Accessory Interface ±15 VDC, normalized signal I/O

Operating Temperature Range –10°C to 45°C

(14°F to 113°F)

1

12 in/300 mm

2.5 in/63 mm

450 watts rms (long term) 1

98 dB (1W@1m)

45 Hz to 3000 Hz

Ferrite

Construction Features

Basic Design

Material

Asymmetrical Trapezoidal

Polypropylene

Finish

Handles

Grille

Grey, textured finish

Two on sides, one on top

Perforated metal with weather- resistant coating

Line Input Power

Power Consumption 320W with musical program and Peak LED blinking

US 120 VAC, 60Hz

Recommended amperage service 2.5 amps

Europe 230 VAC, 50Hz

Recommended amperage service 1.25 amps

Japan 100 VAC, 50/60Hz

Recommended amperage service 3.0 amps

AC connector 3-pin IEC 250 VAC

Amplifiers

Total Amplifier Power 400 watts continuous*

High Frequency 100 watts*

Type Class AB

Rated THD .03%

Low Frequency 300 watts*

Type Class G with parametric servo feedback

Rated THD 0.03%

Control System Function

Electronic Crossover

Phase Alignment

Equalization

Parametric equalization

*Rated power is continuous rms wattage into transducer’s rated impedance @ 1 kHz for the HF amplifier and @ 100 Hz for the LF amplifier

High Frequency Section

Diaphragm Size

Horn Exit Diameter

Power Handling

Sensitivity

Frequency Range

Nominal Impedance

Diaphragm Material

Magnet Type

1.75 in/44.5 mm

1.0 in/24.5 mm

100 watts rms (long term) 1

106 dB (1W@1m)

1000 Hz to 20 kHz

8 ohms

Damped titanium

Ferrite

Safety Features

Protection

Display LEDs

Physical

Height

Width Front

Depth

Weight

Low Frequency Dynamic Bass

Protection, Independent LF and HF

Compressors, Power Supply and

Amplifier Thermal Protection

Signal Present, Peak, Power ON, and

Thermal (Cool Down Auto Reset)

26.0 in/660 mm

15.4 in/390 mm

14.8 in/376 mm

51.0 lb/23.2 kg

Options

PA-A1 Eyebolt (M10 x 1.5 mm x 20 mm)

Horn Design

Horizontal Coverage

Vertical Coverage

Type

Mouth Size

Throat size

90° 1 kHz to 20 kHz avg.

45° 2.8 kHz to 20 kHz avg.

Exponential and conical

12.0 in x 7.0 in/

30.5 cm x 17.8 cm

1.0 in/2.5 cm 2

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1 Measured on-axis in the far field, referenced back to 1 watt rms from maximum power and to 1 meter distance using the inverse square law.

SRM450

3

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Active Speaker System

SRM450

Active Speaker System

4

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SRM450

Active Speaker System

2

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SRM450

Active Speaker System

SRM450 Vertical Polars

90 °

120 ° 60 °

180 °

150 °

210 °

–36 –12

30 °

0 °

330 °

200Hz

250Hz

315Hz

400Hz

180 °

150 °

210 °

120 °

240 ° 240 °

300 °

270 °

90 °

60 ° 120 ° 120 °

150 ° 30 °

180 °

210 °

180 °

150 °

210 °

240 °

120 °

240 °

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270 °

90 °

270 °

–36

–36

300 °

60 °

300 °

–12

–12

330 °

30 °

0 °

0 °

330 °

90 °

270 °

90 °

–36

60 °

300 °

60 °

–12

30 °

0 °

330 °

500Hz

630Hz

800Hz

1kHz

1.25kHz

1.6kHz

2kHz

2.5kHz

180 °

150 °

210 °

–36 –12

30 °

0 °

3.15kHz

4kHz

5kHz

6.3kHz

330 °

240 ° 300 °

270 °

SRM450 Vertical Off-Axis Frequency

Response (UP)

10

8kHz

10kHz

12.5kHz

16kHz

0

–10

–20

0 deg

10 deg

20 deg

30 deg

40 deg

–30

20 100 10000 20000 1000

Frequency (Hz)

SRM450 Vertical Off-Axis Frequency

Response (DOWN)

10

0

–10

–20

0 deg

–10 deg

–20 deg

–30 deg

–40 deg

–30

20 100 1000

Frequency (Hz)

10000 20000

SRM450

Active Speaker System

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SRM450

Active Speaker System

SRM450

Active Speaker System

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3

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SRM450

Active Speaker System

SRM450 Horizontal Polars

0 °

330 ° 30 °

–12

300 ° 60 ° 300 °

–36

270 ° 90 °

200Hz

250Hz

315Hz

400Hz

270 °

240 ° 240 °

120 °

330 °

210 ° 150 ° 210 °

330 °

180 °

0 °

–12

30 ° 330 °

60 °

270 °

300 °

240 °

–36

120 °

90 °

1.25kHz

1.6kHz

2kHz

2.5kHz

270 °

300 °

240 °

210 ° 210 ° 150 °

330 °

180 °

0 °

–12

30 °

60 ° 300 °

–36

270 °

240 °

210 °

180 °

150 °

120 °

90 °

–36

–12

–36

–12

0 °

180 °

0 °

180 °

30 °

150 °

30 °

150 °

60 °

120 °

60 °

120 °

90 °

90 °

8kHz

10kHz

12.5kHz

16kHz

SRM450 Horizontal Off-Axis

Frequency Response

10

0

–10

–20

–30

20 100 1000

Frequency (Hz)

10000 20000

4

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500Hz

630Hz

800Hz

1kHz

3.15kHz

4kHz

5kHz

6.3kHz

0 deg

10 deg

20 deg

30 deg

40 deg

SRM450

Active Speaker System

110

SRM450 Frequency Response On-Axis

100

90

80

70

20 100 1000

Frequency (Hz)

360

SRM450 Beamwidth vs. Frequency

300

240

180

120

60

0

20

Vert BW

Horz BW

100 1000

Frequency (Hz)

SRM450 Input Panel

10000 20000

20

SRM450 Directivity Index

10

0

20 100

10000 20000

1000

Frequency (Hz)

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SRM450 Dimensions

15.4 in/390 mm 14.8 in/376 mm

100

10

10000 20000

1

5

O F 6 P A G E S

15.4 in/390 mm

SRM450

Active Speaker System

www.mackie.com

16220 Wood-Red Road NE, Woodinville, WA 98072 USA

888.337.7404, fax 425.487.4337, [email protected]

UK +44.1268.571.212, fax +44.1268.570.809, [email protected]

ITALY +39.0522.354.111, fax +39.0522.926.208, [email protected]

FRANCE +33.3.85.46.91.60, fax +33.3.85.46.91.61, [email protected]

GERMANY +49.2572.96042.0, fax +49.2572.96042.10, [email protected]

LOUD Technologies continually engages in research related to product improvement. New material, production methods, and design refinements are introduced into existing products without notice as a routine expression of that philosophy. For this reason, any current LOUD Technologies product may differ in some respect from its published description, but will always equal or exceed the original design specifications unless otherwise stated. ©1999-2004 LOUD Technologies Inc. All rights reserved. Mackie and the “Running Man” figure are registered trademarks of LOUD Technologies Inc.

6

Part No. 091-221-00 Rev. B 09/04

O F 6 P A G E S

SRM450

Active 2-Way Sound

Reinforcement Speaker System

1

O F 6 P A G E S

SRM450

Active Speaker System

5

O F 6 P A G E S

SRM450

Active Speaker System

Architects’ and Engineers’ Specifications

The active two-way, full-range loudspeaker system shall incorporate one 12-inch low-frequency (LF) transducer and a 1-inch exit/1.75-inch diaphragm compression driver high-frequency (HF) transducer. The LF driver shall be mounted in a vented polypropylene molded enclosure tuned for optimum low-frequency response. The HF transducer shall be loaded on a multi-cell horn aperture and mounted on a combination exponential and conical horn.

The system shall have a nominal coverage pattern of

90° (horizontal) x 40° (vertical). System frequency response shall vary no more than ±3 dB from 55 Hz to 18 kHz measured on axis. The loudspeaker shall incorporate a

Class G low-frequency amplifier capable of delivering 300 watts rms over a frequency range of 20 Hz-2000 Hz. The system shall incorporate a Class AB 100 watt rms amplifier specifically designed to power the HF driver over the range of 1500 Hz-20 kHz. The amplifiers shall be mounted on an aluminum heatsink, which shall be mounted on the rear of the speaker system, and shall be convection cooled.

SRM450 Block Diagram

INPUT

THRU

1

1

2

3

2

3

J15

SIGNAL

LED

LOW CUT CONTOUR

THERMAL

LED

POWER

LEDS

HI-PASS

HI-FREQ

COMPRESSOR

SIGNAL

SENSE

THERMAL

SWITCH

LOW AC

VOLTS SENSE

MUTE

ON/OFF

CONTROL

MUTE

SIGNAL

SENSE

+15VDC

OFF

TIMED

TURNOFF

ON

FUSE

POWER

SWITCH

SWEEPING

FILTER

40-120 Hz DELAY

176uS

LO-PASS COMPRESSOR

TOROIDAL POWER

TRANSFORMER

+

–

MID VDC

+

–

LO VDC

+

HI VDC

– THRESHOLD LPF

THRESHOLD

THRESHOLD

HI-FREQ

AMP

MUTE

LO-FREQ

AMP

PEAK

DETECTION

BASS CONTROL SERVO LOOP

PEAK

LIGHT

TWEET

Thermal protection shall be provided by a thermal sensor mounted on the heatsink, which monitors the heatsink temperature and triggers the thermal protection circuit should the temperature exceed 158° F (70° C). The

Thermal LED shall light and the input signal to the amplifiers shall be muted until the heatsink cools to a safe operating level, at which point the thermal protection circuit auto-resets and normal operation resumes.

Overload protection for the LF driver shall be provided by a dynamically variable high-pass filter, the corner frequency of which shall slide from 40 Hz to 120 Hz as the LF amplifier output approaches clipping. Additional protection shall be provided for both the LF and HF drivers by a compressor circuit, which monitors the low-frequency and high-frequency amplifier outputs and reduces the gain as the amplifiers approach clipping.

The system shall include an XLR input connector, an

XLR loop-through signal connector, a level control capable of providing up to 40 dB of gain to accommodate both microphone and line-level signal levels, a sound contour switch providing +3 dB of equalization at 100 Hz and 12 kHz, a high-pass switch for filtering out frequencies below 75 Hz, and a timed turn-off switch for self shut-down.

The loudspeaker enclosure shall have an asymmetrical trapezoidal shape and shall incorporate 10 integrated

M10 fly points, two side handles, and a top relocation handle. The enclosure shall be molded from polypropylene material. The front of the loudspeaker shall be covered with a powder coated, weather-resistant perforated steel grille.

The active two-way full-range loudspeaker system shall be a Mackie SRM450.

LO-FREQUENCY

DRIVER

SENSE

RESISTOR

WOOF

MACKIE

SRM450

BLOCK DIAGRAM

(#060322SEDF)

Electronic files for this product available at: www.mackie.com

This Specification Sheet SRM450_SS.PDF

Owner/Operator’s Manual SRM450_OM.PDF

www.mackie.com

16220 Wood-Red Road NE, Woodinville, WA 98072 USA

800.898.3211, fax 425.487.4337, [email protected]

UK +44.1268.570.808, fax +44.1268.570.809, [email protected]

LOUD Technologies continually engages in research related to product improvement. New material, production methods, and design refinements are introduced into existing products without notice as a routine expression of that philosophy. For this reason, any current LOUD Technologies product may differ in some respect from its published description, but will always equal or exceed the original design specifications unless otherwise stated. ©1999-2004 LOUD Technologies Inc. All rights reserved. Mackie and the “Running Man” figure are registered trademarks of LOUD Technologies Inc.

Part No. 091-221-00 Rev. B 09/04

6

O F 6 P A G E S

SRM450

Active 2-Way Sound

Reinforcement Speaker System

1

O F 6 P A G E S