Mackie SRM1801 Benutzerhandbuch

9

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.

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. 

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.

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.

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 
in alternate venues. Don’t be afraid to experiment with 
the position of the polarity switch. See page 11 for more 
information.