Mackie SRM1801 Owner's Manual - Page 9

8 9 10 11 THERMAL OL SIGNAL POWER LEVEL 7 - 6dB +6dB POL ARITY 6 NORMAL INVERT OUTPUTS A HIGH PASS B 5 A FULL RANGE B 4 INPUTS A B 3 18-INCH POWERED SOUND REINFORC 3. INPUTS 5. HIGH PASS OUTPUTS Balanced XLR female connectors are provided for the left and right inputs. Connect the full-range line-level signal from the mixer or other signal source to these input jacks. If you are connecting a single subwoofer output, or LFE (low-frequency effects) output to the subwoofer, you may use either the A or B input connector. CAUTION: NEVER connect the output of an amplifier directly to the input of the subwoofer. This could damage the input circuitry of the active subwoofer. 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. Balanced XLR male connectors are provided for the line-level A and B high-pass outputs. The subwoofer's internal active crossover splits the input signals into two frequency bands. The low frequency range below 125 Hz goes to the internal amplifier that powers the subwoofer. The frequency range above 125 Hz is sent to these line-level output jacks. Connect these outputs to the inputs of your main powered loudspeakers, or to the inputs of the amplifier powering the main loudspeakers. In this way, the main loudspeakers will play the range above 125 Hz. If the main loudspeakers have good low-frequency response, then you may decide to use the full-range outputs [4] instead. The level control and polarity switch have no effect on the high-pass outputs. The outputs are separate and maintain the stereo separation of the input signals. 6. POLARITY The signal at these outputs is a direct copy of the input signals. 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. This switch reverses the polarity of the signal going into the subwoofer amplifier by 180°. It has no effect on the signal at the line-level outputs. There is no right or wrong setting for this switch. 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, your system may vary when positioned differently and WARNING:TOREDUCETHERISKOFFIREORELECTRIC SHOCK, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. DO NOT REMOVE COVER. NO USER SERVICEABLE in alternate venues. Don't be afraid to experiment with AVIS:RISQUE DE CHOC ELECTRIQUE - NE PAS OUVRIR PARTS INSIDE.REFER SERVICINGTO QUALIFIED PERSONNEL. SERIAL NUMBER REVISION the position of the polarity switch. See page 11 for more information. 9 POWER