User manual MACKIE TH-18S

[. . . ] TH-18s 18" Powered Subwoofer OWNER'S MANUAL Important Safety Instructions 1. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat. Do not defeat the safety purpose of the polarized or grounding-type plug. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet. [. . . ] The outputs are separate and maintain the stereo separation of the input signals. 4. FULL RANGE OUTPUTS Balanced XLR male connectors are provided for the line-level A and B full-range outputs. Connect these outputs to the inputs of another powered subwoofer, main powered loudspeakers, or to an amplifier powering passive loudspeakers. These outputs allow you to daisy-chain multiple subwoofers, and/or send the full-range signals to the main loudspeakers. The level control and polarity switch have no effect on the full-range outputs. The outputs are separate and maintain the stereo separation of the input signals. 6. POLARITY This switch reverses the polarity of the signal going into the subwoofer amplifier by 180°. Listen to the overall blend of the subwoofer with the rest of the system and select the switch position that gives you the best sound for your audience. In fact, WARNING: your system may vary when positioned differently and AVIS: CHOC ELECTRIQUE NE PAS in RISQUE DESERIAL NUMBER OUVRIR Don't be afraid to experiment with alternate--venues. See page 11 for more information. TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. REFER SERVICING TO QUALIFIED PERSONNEL. 9 POWER THERMAL 8 7 9 10 11 OL SIGNAL POWER OUTPUTS LEVEL A HIGH PASS B 5 - 6dB +6dB R 6 POL ARITY NORMAL INVERT A FULL RANGE B 4 A INPUTS ACTIVE SOUND REINFORCEMENT SUBW TH-18 B 3 7. LEVEL The LEVEL control adjusts the overall signal level at the input to the built-in power amplifier. It ranges from -6 dB to +6 dB (maximum gain), with unity gain at the center position (12 o'clock). The control has no effect on the level of the highpass outputs [5] or the full-range outputs [4]. 9. OL LED The OL (overload) indicator lights when the amplifier in the TH-18s is near the clipping point. It is okay if the OL indicator blinks occasionally, because this means that the transient peaks are just reaching the maximum output of the amplifier and you are getting the most from your TH-18s. If the OL indicator is blinking frequently or lighting continuously, turn down the LEVEL control [7] on the TH-18s or turn down the signal at it source (e. g. , the mixing console) until the OL indicator blinks occasionally or not at all. 8. THERMAL LED The TH-18s is equipped with a thermal protection circuit that monitors the internal temperature of the amplifiers and heatsink. If the temperature exceeds a safe operating level, this indicator lights and the input signal is muted to allow the amplifiers to cool. When the temperature cools to a safe level once again, the thermal protection circuit deactivates, the Thermal LED turns off and the TH-18s returns to normal operation. When the TH-18s is in thermal protect mode, the power LED [11] will remain lit, indicating that the unit is still powered on despite the lack of output. Activation of the thermal protection circuit is an indication that you should take steps to avoid continued thermal problems. [. . . ] Simply plug the signal source (e. g. , mixer output) into the TH-18s input jack, and patch that subwoofer's full range jack to the next subwoofer's input jack, and so on, daisy-chaining multiple subwoofers. 15 Appendix C: TH-18s Specifications Acoustic Performance Frequency Range (­10 dB): Frequency Response (­3 dB): Max peak SPL (calculated) : 1 Construction Features 35 Hz ­ 150 Hz 50 Hz ­ 115 Hz 129 dB 124 dB Handles: 18 in / 457 mm 3 in / 76 mm Paper Ferrite Grille: Basic Design: Material: Finish: Trapezoidal Void-free plywood Textured black catalyzed polyurethane paint One on each side Perforated metal Max peak SPL (measured) : 2 Transducer Diameter: Voice coil diameter: Diaphragm material: Magnet material: Physical Properties Height: Front Width: Rear Width: Depth: Weight: 24. 1 in / 612 mm 20. 2 in / 513 mm 15. 1 in / 383 mm 25. 3 in / 643 mm 73 lb / 33. 1 kg Power Amplifier Rated Power: THD: Design: Cooling: 500 watts rms 1000 watts peak <0. 1% Class D Convection Mounting Method: The TH-18s subwoofer is designed to sit on the floor or stage. is always striving to improve our products by incorporating new and improved materials, components, and manufacturing methods. Therefore, we reserve the right to change these specifications at any time without notice. "Mackie, " and the "Running Man" are registered trademarks of LOUD Technologies Inc. [. . . ]