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SERVICE ON THIS EQUIPMENT IS TO BE PERFORMED BY EXPERIENCED REPAIR TECHNICIANS ONLY
This manual contains basic service information. It is essential that you have a copy of the user's manual as this contains the complete operating instructions.
SERVICE TECHNICAL ASSISTANCE
Mackie Designs, Service Technical Assistance, is available 8AM - 5PM PST, Monday through Friday for Authorized Mackie Service Centers, at 1-800-258-6883. Feel free to call with any questions and speak with a carefully-calibrated technician. If one is not available, leave a detailed message and a qualified Mackoid will return your call asap.
DISCLAIMER
The information contained in this manual is proprietary to Mackie Designs, Inc. The entire manual is protected under copyright and may not be reproduced by any means without express written permission from Mackie Designs, Inc.
Block Diagram
Low-Frequency Transducer
Diameter | 300mm (12") |
Voice Coil Diameter | 63.5mm (2.5") |
Sensitivity (1W@1m) | 98 dB |
Nominal Impedance | 8 ohms |
Power Handling | 300W |
Frequency Range | 50Hz – 3000Hz |
High-Freq Driver and Horn
Diaphragm Diameter | 44.5mm (1.75") |
Exit Throat Diameter | 24.5mm (1") |
Diaphragm Material | Titanium |
Sensitivity (1W@1m) | 106 dB |
Nominal Impedance | 8 ohms |
Power Handling | 150W |
Frequency Range | 1000Hz – 20,000Hz |
Low-Freq Power Amplifier
Rated Power | 300 watts |
Rated THD | < 0.1% |
Cooling: | Convection Extrusion |
Design: | Class G, Parametric Servo Feedback |
High-Freq Power Amplifier
Rated Power | 100 wa tts |
Rated THD | < 0.1% |
Cooling: | Convection Extrusion |
Design: | Conventional Class AB |
System specs
Input Type | Balanced Differential |
Input Impedance | Line: 20k ohms |
Input Protection | RFI and level protected |
Sensitivity | Line: +4 dBu (centered) |
Mic: –36 dBu | |
Maximum Input Level | Line: +22 dBu |
Low-Cut Frequency | 75Hz, Second-order filter |
EQ | Peaking +3 dB @ 55Hz, +3 dB @ 20kHz |
Over-Excursion Protection | Second-Order High-Pass Filter |
Thermal Protection | Amplifier shutdown, autoreset |
Low-Line Voltage Shut Down: | 60% Nominal line |
Acoustic Freq Response: | 45Hz – 20,000Hz |
Low-Freq –3 dB Point: | 55Hz |
Maximum SPL @ 1m: | 123 dB |
Low-Freq Crossover: | 24 dB/octave, time offset corrected |
High-Freq Crossover: | 24 dB/octave |
Crossover Frequency: | 1600Hz |
Driver Protection | Independent LF and HF compressors |
Low-Freq Roll-Off: | Dynamic-signal level dependent |
Accessory Interface | ±15V DC |
Operating Temp Range | –10ºC - 45ºC (14ºF - 113ºF) |
Line Input Power
US | 120V, 60Hz |
Europe | 230V, 50Hz |
Japan | 100V, 50/60Hz |
Disclaimer
Since we are always striving to make our products better by incorporating new and improved materials, components, and manufacturing methods, we reserve the right to change these specifications at any time without notice.
The SRM450 is an active two-way loudspeaker system capable of extremely high sound pressure levels.
The SRM450 active monitors feature a 12" high-power low-frequency woofer and a 1.75" titanium diaphragm high-output precision compression driver. This high frequency driver is mounted on an acoustically non-resonant exponential waveguide, providing a wide, controlled dispersion and precise reproduction of the critical upper mid-range and high frequencies. The result is an unbelievably smooth off-axis response that allows everyone in the audience to experience the same high-resolution audio no matter where they are seated. Each driver has been specifically designed by our engineers for optimum performance in the lightweight high-strength cabinet.
To power these beautiful things, each SRM450 includes two of our acclaimed FR Series "Fast Recovery" power amplifiers. Our exclusive design uses low negative feedback, yet allows the amplifiers to maintain low distortion and stability and to quickly recover when driven into clipping. The amplifiers include the following features:
Although the amplifiers have these protection circuits, you must still make sure the PEAK light is not blinking often or continuously. If it is, turn down your mixer faders, or preamplifier gain, or turn down the SRM450 LEVEL control.
The built-in electronic crossover is a 24 dB/octave Linkwitz-Riley design. Although more expensive than other crossover designs, the benefits provided by the Linkwitz-Riley design have been well documented. These benefits include:
The SRM450 cabinet was designed to be the strongest molded composite cabinet on the planet. This material is as strong as concrete, and rigid enough to prevent unwanted vibrations in the cabinet. It has built-in fly points for hanging, and a socket in the bottom for mounting on a tripod stand. Although it is an exceptional choice for installed sound situations, its light weight and durable finish also make it ideal for portable sound system use. The asymmetrical trapezoidal design of the cabinet makes it easy to use as a floor wedge for stage monitor applications.
You must perform the following leakage test before returning the unit to your customer. Take every safety precaution to protect yourself while doing this test.
The Amplifier Bias of every SRM450 must be carefully adjusted as follows.
Parts Numbering guide
040- Cables
055- Finished PCB Assy
100- Pots and resistors
200- Capacitors
300- Semiconductors
400- Jacks/Connectors
500- Switches
510- Fuses
550- Chassis Metalwork
600- Transformers
601- Inductors
610- Wires and Cables
640- AC line cords
700- Hardware
760- Knobs/Plastic
770- Fans
790- Misc./Packing
800- Printed Material
860- EPROM
PART# | DESCRIPTION |
090-132-xx | Master Parts |
080-136-00 | Cabinet subassembly |
055-227-00 | Main Board |
Components noted with this symbol shall be replaced only by the component specified. This is required to maintain product safety.
Master Parts List 090-132-xx
Cabinet Subassembly 080-136-00
PART NO. | DESCRIPTION | REV | QTY | NOTES |
055-280-00 | PC B ASSY LED | 1 | ||
080-156-00 | SA C ABLE PC B LED BLK/WHT | 1 | ||
080-157-00 | SA SUPPO RT DRIVER THRO AT | 1 | ||
080-158-00 | SA HARNESS BLU & BLU/BLK | 1 | ||
080-159-00 | WIRE YEL WOOFER | 1 | ||
490-025-00 | COMP DRIVER | 1 | Comp driver | |
490-042-00 | WOOFER SRM450 | 1 | Woofer | |
490-047-00 | SRM FRO NT C ASE MRB | 1 | Front case | |
490-048-00 | SRM REAR C ASE MRB | 1 | Rear case | |
490-052-00 | PO LE MNT KNO B | 1 | ||
490-053-00 | FO AM D BLK&WHT | 1 | ||
550-408-00 | TOP HANDLE PA SPKR | 1 | Top handle | |
550-410-00 | GRILL 12IN SPKR AC TIVE | B | 1 | Grill |
700-123-00 | SC REW SIDE HDL G RIP MNTG | 4 | ||
700-124-00 | SC REW HDL MNTG TO C ASE | 4 | ||
700-125-00 | SC REW WO O FER | 8 | ||
701-021-00 | 6X3/8 PHP PLASTITE BLK | A | 4 | |
701-026-00 | SCREWS FOR CASE | 17 | ||
701-027-00 | SCREW BAC K PANEL | 12 | ||
701-028-00 | SCREW FEET G RILL C D-THR | 13 | ||
701-029-00 | SC REW PC B ASSY LED | 1 | ||
705-031-00 | FLYING HW INS NUTS G ALV | 8 | ||
705-032-00 | FLYING HW INS NUTS BLK | 2 | ||
710-049-00 | WASH HDL MTNG TO C ASE | 4 | ||
710-050-00 | WASH FLAT WO O FER | 8 | ||
710-051-00 | FLYING HW INS WASH G ALV | 8 | ||
710-052-00 | FLYING HW INS WASH BLK | 2 | ||
712-068-00 | FLYING HW INSERTS | 10 | ||
712-069-00 | GROMMET LEAD WIRE | 1 | ||
750-015-00 | FEET | 3 | ||
760-115-00 | SIDE HANDLE GRIP SRM450 | A | 2 | |
760-116-00 | PLASTIC SIDE HANDLE | A | 2 | |
780-135-00 | GASKET WOOFER SRM450 | 1 | Woofer Gasket | |
780-138-00 | FOAM DA C O MP DR TO CASE | 1 | ||
780-139-00 | FO AM D C O MP D TO THRO AT | 1 | ||
780-140-00 | GASKET FOR SPEAKER | 1 | ||
790-010-00 | BAG 20 X 7 X 48 4MIL G USS | 1 | ||
800-141-00 | BOX SRM450 | 1 | ||
810-088-00 | CARDBD BTTM SRM450/C 300 | 1 | ||
810-089-00 | TRIANG INS SRM450/C 300 | 1 | ||
840-249-00 | LBL LO G O SPKR FRO NT | A | 1 | |
840-250-00 | LBL LO G O SPKR RUNNING MAN | A | 1 | |
840-251-00 | LBL SPKR PWR AC TIVE | A | 1 | |
840-314-00 | LBL INSERT COVER SRM450 | A | 10 |
055-227-00 Main pcb assembly
Components noted with this symbol shall be replaced only by the component specified. This is required to maintain product safety.
Note: These instructions are to be used along with Mackie kit P/N 020-006-00 to repair SRM450s which already have the pole mount insert stripped out. The pole mount bolt assembly (bolt, knurled brass insert and alignment bushing) must still be with the unit as the parts will be recycled and also used during the rework.
Here you can download full pdf version of manual, it may contain additional safety instructions, warranty information, FCC rules, etc.
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