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GETTING TO KNOW YOUR ACT-18 ACTIVE 18” SUBWOOFER
PANEL CONTROLS
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1) Level Control:
Sets the volume of the subwoofer
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2) Phase Switch:
Sets the polarity of the ACT-18.
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3) Power Indicator:
The Power indicator lights when the ACT-18 amplifier
has been turned on and has power.
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4) Protection:
Red LED turns on when distortion is audible in the
amplifier output. This indicates that you should turn the amplifier
down.
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5) Right & Left Inputs:
These inputs are summed and sent to amplifier’s
Low Pass filter (120 Hz and below).
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6) Right & Left Full-Range Outputs:
Send stereo full-range signal
allowing daisy chaining of additional subwoofers. You do not need to
y-cable out of your mixer or audio device to get an additional full-
range signal.
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7) Right & Left High-Pass Outputs:
Send stereo high-pass signal (120
Hz and above) directly to active, full-range speakers or through a rack
mount amplifier to passive speakers.
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8) External Speaker On/Off Switch:
Turns Speakon NL-4 connector
(and external subwoofer) on and off. When only using the ACT-18, turn
this switch off. When an external, non-powered subwoofer (ACT-18S)
is connected, turn this switch on. NEVER turn switch on or off while
amplifier is turned all the way up.
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9) External Speaker Output:
The Speakon NL-4 connector connects
the amplifier to an external, non-powered subwoofer (ACT-18S). Either
pins 1+ and 2+ can be used as the positive connection. Either pins 1-
or 2- can be used as the Negative Connection. External subwoofer
must be 8 Ohms
10) ON/OFF Switch:
Turns the ACT-18 amplifier on or off. The ACT-18 will
only turn on when the amplifier detects an audio signal.
11) Fuse Holder:
Houses a fast-resetting 12 amp fuse.
12) Power Cord Connector:
For attachment of the included power cord.
Summary of Contents for ACT-18
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