SRM450 v2 Active Sound Reinforcement SPEAKEr USer’s manual
IMPORTANT SAFETY INSTRUCTIONS 1. Read these instructions. 13. Unplug this apparatus during lightning storms or when unused for long periods of time. 2. Keep these instructions. 14. Refer all servicing to qualified service personnel.
Contents IMPORTANT SAFETY INSTRUCTIONS........................................2 CONNECTIONS.......................................................................10 INTRODUCTION........................................................................4 PLACEMENT............................................................................10 HOOKUP DIAGRAMS...............................................................6 Room Acoustics..............................................................
INTRODUCTION Thank you for choosing LOUD Technologies’ Mackie active sound reinforcement loudspeakers. The SRM450 v2 is a redesigned version of our popular SRM450 active loudspeaker. With its newly designed Class-D Fast-Recovery amplifiers, high-output compression driver, and new 12" neodymium woofer, it produces an even smoother sound than the original. SRM means Sound Reinforcement Monitor, and the SRM450 v2 truly produces a studio quality sound in a sound reinforcement speaker.
The Cabinet The SRM450 v2 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.
HOOKUP DIAGRAMS Quick Start 1. Start with the following settings on the back of the SRM450 v2: Turn the POWER switch off (down). Set the TIMED TURNOFF, CONTOUR, and LOW CUT switches out. WARNING: Turn the LEVEL control down (counterclockwise) before every use. If not, you could be in for a startling surprise, especially if the last time you used it was with a microphone and now you want to connect a line-level source. 2.
For microphone connections, you can daisychain up to two SRM450 v2s using the THRU jacks as shown. Take great care to point any microphones away from the SRM450 v2s, otherwise you may get feedback.
REAR PANEL DESCRIPTION The SRM450 v2 has several connectors, controls, and indicators that you should understand. 1. IEC Socket This is where you connect the supplied AC linecord to provide AC power to the SRM450 v2’s built-in power amplifiers. Plug the linecord into an AC socket properly configured for your particular model. Note: If you happen to lose the AC linecord, replacements are readily available at any office or computer supply store. Always use a three-pin plug with a ground pin. 5.
8. LEVEL 11. INPUT Connector This is used to adjust the signal level, going into the built-in power amplifiers, from Off up to 40 dB of gain. Since the SRM450 v2 incorporates Mackie’s world-class low-noise mic preamp technology, you can connect either a line-level or a microphone-level signal to the input, and use this control to adjust the level correctly. There is no phantom power for a microphone, so you should use a dynamic mic, or use a condensor type if it has its own battery power.
CONNECTIONS PLACEMENT The SRM450 v2 has a female XLR input that accepts a balanced or unbalanced mic- or line-level signal. When connecting a balanced signal, be sure it’s wired per AES (Audio Engineering Society) standards: XLR Hot (+) Pin 2 Cold (–) Pin 3 Shield (Ground) Pin 1 The SRM450 v2 active speakers are designed to sit on the floor, a tabletop, or to fit on a standard tripod speaker stand. They can also be suspended by the rigging points, shown opposite.
RIGGING Here are some other placement tips: • Avoid placing loudspeakers in the corners of a room. This increases the low-frequency output and can cause the sound to be muddy and indistinct. • Avoid placing loudspeakers against a wall. This, too, increases the low frequency output, though not as much as corner placement. However, if you do need to reinforce the low frequencies, this is a good way to do it. • Avoid placing the active speakers directly on a hollow stage floor.
THERMAL CONSIDERATIONS The amplifiers inside the SRM450 v2s are convection cooled by a large heatsink. For efficient cooling, it is important to allow at least six inches of free space behind the SRM450 v2. If you use the SRM450 v2 on its side for stage monitor applications, we highly recommended that you engage the rear panel LOW CUT switch. This will allow more power for useful monitor frequencies, while reducing the possibility of overheating.
For the US 120 V model: A maximum of five SRM450 v2s can be connected per 15A service. This allows each SRM450 v2 to be safely operated at its maximum level. Don’t use an outlet if it is wired improperly! This is to protect yourself as well as your equipment. When turning your system on, turn on the SRM450 v2s last. This will stop any turn-on thumps and bangs from your source equipment being amplified. When turning off your system, turn off the SRM450 v2s first.
SERVICE INFORMATION If you think your Mackie product has a problem, please check out the following troubleshooting tips and do your best to confirm the problem. Visit the Support section of our website (www.mackie.com/support) where you will find lots of useful information such as FAQs, documentation, and user forums. You may find the answer to the problem without having to send your Mackie product away.
Noise • Make sure all connections to the active speakers are good. • Make sure none of the signal cables are routed near AC cables, power transformers, or other EMI-inducing devices. • Is there a light dimmer or other SCR-based device on the same AC circuit as the SRM450 v2? Use an AC line filter or plug the SRM450 v2 into a different AC circuit. • Disconnect any cables which come in from outside, such as cable TV, satellite TV or roof top antennas.
Repair CARE AND MAINTENANCE For warranty repair or replacement, refer to the warranty information on page 19. Your Mackie active speakers will provide many years of reliable service if you follow these guidelines: Non-warranty repair for Mackie products is available at a factory-authorized service center. To locate your nearest service center, visit www.mackie.com, click “Support” and select “Locate a Service Center.
SRM450 SPECIFICATIONS System Specifications Frequency Response (–3 dB) 55 Hz – 18 kHz Frequency Range (–10 dB) 45 Hz – 20 kHz Directivity Factor; Q (DI) 9.95 (9.
THRU INPUT 1 1 FUSE +15VDC MACKIE SRM450 v2 BLOCK DIAGRAM (073107) SIGNAL SENSE 3 2 3 2 LOW AC VOLTS SENSE THERMAL SWITCH LOW CUT TOROIDAL POWER TRANSFORMER POWER SWITCH ON OFF TIMED TURNOFF SIGNAL SENSE SIGNAL LED J15 + LO VDC – + MID VDC – HI-PASS THRESHOLD 176uS 40-120 Hz DELAY + HI VDC – SWEEPING FILTER MUTE POWER LEDS MUTE ON/OFF CONTROL THERMAL LED CONTOUR COMPRESSOR LPF THRESHOLD LO-PASS COMPRESSOR HI-FREQ PEAK DETECTION BASS CONTROL SERVO LOOP LO-FREQ A
SRM450 v2 Limited Warranty Please keep your sales receipt in a safe place. A. LOUD Technologies Inc. warrants all materials, workmanship and proper operation of this product for a period of three years from the original date of purchase. You may purchase an additional 24-month Extended Warranty (for a total of 60 months of coverage). Visit our website and follow the “Product Registration” links for details (www.mackie.com).
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