Pr:o 8 A, Pr:o 10 Xa, Pr:o 12 A, Pr:o 12 Ma, Pr:o 15 A, Pr:o 15 Xa; Control Features - HK Audio PREMIUM PR:O 8 A Mode D'emploi

PREMIUM PR:O Active 1.4
1 PR:O 8 A, PR:O 10 XA,
PR:O 12 A, PR:O 12 MA,
PR:O 15 A, PR:O 15 XA
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1.1 Control Features

1 Gain
This knob adjusts the input level.
2 Tone (not available on the PR:O 12 MA)
The Tone knob lets you optimize your active speaker
cabinet for music or speech applications. It uses
a special filtering setup that adapts frequency
response to suit the given requirements. Room
acoustics vary as does the cabinet's position, so we
recommend you find the optimum position by piping
in a full-fledged music signal, using a microphone,
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and twisting the knob. Turning it towards Speech
boosts vocal signals, and turning it towards Music
conjures a bigger, bolder sonic image with more low
end and less midrange frequencies.
The Tone knob lets you tune the speaker cabinet to
suit music or public address applications. Its special
filtering circuit adapts its frequency response to the
given requirements.
Note: Twisting the Tone knob counterclockwise to-
wards Music gradually attenuates a broad midrange
frequency band with a center frequency of 1500 Hz
(2500 Hz -PR:O 10 XA, 2600 Hz - PR:O 8 A). The
maximum cut is 2 dB, achieved by setting the knob
to the far left position. At the same time, this ad-
justment boosts bass frequencies in the range of 80
to 100 Hz in equal measure by up to 2 dB. Twisting
the Tone knob counterclockwise towards Speech
achieves the opposite effect, boosting the midrange
frequency band and cutting bass frequencies accor-
dingly by up to 2 dB.
A special corrective circuit compensates for this EQ
effect so that the perceived volume level remains the
same despite the change in tone. Setting the knob to
the center position defeats the filter.
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3 Mic/Line Switch (not on the PR:O 12 MA)
When patching in a microphone, adjust the input
gain by setting the Line/Mic button to Mic. This
provides a 30-dB gain boost, thereby optimizing the
input for microphone signals.
4 Input
This electronically balanced XLR/ 1/4" combi input
accepts mixer signals (pin 1= ground, 2= +, 3= -).
5 Through
This parallel output patches the incoming line signal
through, for example, to other PREMIUM PR:O
active speakers or monitors.
6 Limiter Status LED
This dichromic LED indicates the signal level and
limiter status. Green means the signal level is okay;
red means the limiter has engaged and is respon-
ding to high-volume signal peaks.
CAUTION! This is not a clip LED. It's okay if it
lights up red briefly every now and then; this merely
indicates the RMS Limiter is operating. If the signal
LED remains constantly in the red at signal peaks,
check the source signal's input level and back off
the speaker's Gain knob. A status LED that lights
up red continuously indicates there is a fault in the
speaker system.
7 Power Switch
This is the PREMIUM PR:O powered cabinet's on/off
button. The signal LED lights up green to indicate
the cab is powered up.
Note: The Power button is embedded to prevent
unintentional actuation. When set to POWER ON,
the button sits almost flush with the connector pa-
nel. This ensures it is not engaged accidentally, yet
remains readily accessible.
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