Инструкции Пользователя для Mackie DLM12S

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This switch reverses the polarity of the signal going

into the subwoofer amplifier by 180˚. It has no effect on
the signal at the 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 14 for more information.

Typically, full-range loudspeakers are connected

to the high pass outputs to “split” the work with the
DLM12S subwoofer. The subwoofer handles all of the
low frequencies and the loudspeakers handle the rest.
As a result, it is more efficient and a bit louder.

Balanced XLR male connectors are provided  

for the line-level A and B high pass outputs.

The subwoofer’s crossover splits the input signals into
two frequency bands. The low frequency range below  
20 Hz – 200 Hz goes to the internal amplifier that  
powers the subwoofer. The frequency range above  
20 Hz – 200 Hz is sent to these line-level output jacks.
The frequency range depends on where the crossover
(XVR) [11] is set.

Connect the full range outputs to the inputs of  

another powered subwoofer, powered loudspeakers,
or to an amplifier powering passive loudspeakers.
Balanced XLR male connectors are provided for the
line-level A and B full range outputs.

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 loudspeakers. It’s a great way to add side fills, too!
See page 7 to learn more about daisy-chaining DLM12S
subwoofers.

This switch allows you to choose whether the  

A and B inputs are sent out separately [switch out] or
as a mono sum of both inputs [switch in].

For example, if a mixer’s L/R outputs are connected

to the A and B inputs of a DLM12S subwoofer and the
full range outputs are connected to strategically placed
DLM loudspeakers, engage the switch so the signal is
mono-summed. Otherwise, you’ll get just the left or
right signal from the mixer’s output sent from the A  
and B full range outputs to the DLM loudspeakers.