Setting Up And Connecting Cabinets; Operating Speakers; Settings; Alignment - HK Audio PREMIUM PR:O 8 A Mode D'emploi

8 Mains Input
Use the factory-included locking power cord to con-
nect this socket to a mains outlet. The catch holds
the cord in place, preventing accidental unplugging.
You must release the yellow catch on the bottom of
the plug before you can remove the cord.
Note: This socket also accepts a standard Euro
mains cable, but it will not lock it in place.
9 Parallel Speaker Out
Use this Speakon NL4 output to connect another
passive PREMIUM PR:O enclosure or another
manufacturer's passive cabinet.
Be sure to watch the impedance rating, connecting
no more than one enclosure with an impedance no
lower than 8 ohms. The power amp delivers up to
300 watts to this output.
1.2 Setting Up and Connecting
Cabinets
Connect cords routed from your mixer (monitor
out, line out, or a similar output) to the balanced
Input sockets using a cord equipped with standard
XLR microphone connectors. Make sure the XLR
connectors' terminals are configured as follows:
1= ground, 2= +, 3= -.
If you wish to connect a microphone directly to the
PREMIUM PR:O active cabinet without going into
a mixer first, plug it into the balanced Input socket
and set its input sensitivity to Mic. Use a standard
XLR microphone cord to do this. Make sure the XLR
connectors' terminals are configured as follows:
1= ground, 2= +, 3= -.

1.3 Operating Speakers

• First make sure the powered cabinet is off.
CAUTION! Make sure the local mains voltage mat-
ches the PREMIUM PR:O active cabinet's specified
voltage. If you connect the PREMIUM PR:O cab to
the wrong mains voltage, you may destroy its elec-
tronic components.
• Back the Gain and Line/Mic knobs all the way off,
turning them counterclockwise as far as they will go.
When connecting line signals, be sure to first switch
on all other connected components first; that is, the
connected mixer and signal sources patched into
it, such as keyboards, instrument amps, effects and
so forth. Confirm that the PREMIUM PR:O powered
enclosure's Mic/Line control is set to the correct
mode, the standard mode being Line.
Again, always switch on the PREMIUM PR:O active
cabinet last, that is, after you switch on all con-
nected devices. After you power the system up by
engaging the Power switch, a system check prompts
the fan to briefly kick on and back off again in about
five seconds. The fan is temperature-controlled, ac-
tuating only at very high volumes and temperatures
requiring cooling.
After you power up the cab by engaging the Power
switch, the Power LED lights up green when the
cabinet receives mains power. Set the Gain Line In
knob to the center or 12 o'clock position (= 0 dBV).
This is the preferred level if you have connected a
mixer to the PREMIUM PR:O active cabinet. If you
are patching a CD player or keyboard straight into
the cab, turn the Gain Line In knob clockwise all the
way to the far right to achieve maximum volume. If
the input signal is still too weak, boost the level at
the signal source, for instance, by adjusting an MP3
player's volume knob.
If necessary, you can turn the PREMIUM PR:O
powered enclosure's Gain knob counterclockwise
to the far left position and then press the Mic/Line
button. This boosts the input signal by 30 dB. Then
adjust the input gain by slowly turning the Gain
knob to the right until you attain the desired volume.
For the best audio results, ensure the Limiter LED
(red) does not light up continuously.

1.4 Settings

Adjusting volume with the Gain knob
Twist this knob and engage the Mic/Line switch line
to adjust microphone and line signal levels.
If you hear distortion or saturated signals, first check
the signal sources and, if possible, reduce the out-
put signal level there. If you cannot adjust the level
of the signal routed to the PREMIUM PR:O active
cabinet at the source, match it to the power amps by
backing off the Gain Line In knob.
CAUTION: Never tape over the plug's ground
terminal - this endangers lives!
Tone (not available on the PR:O 12 MA)
Starting at the center or 12 o'clock position, you
can EQ the sonic image by turning the knob to the
right or left. Set it to MUSIC to attenuate midrange
frequencies somewhat and boost the low range fre-
quencies for live or CD signals.
Setting the knob to SPEECH enhances intelligibility
for public address purposes.
A corrective circuit automatically compensates
for EQ, balancing out the overall volume for each
setting.

1.5 Alignment

HK Audio DuoTilt™
(apart from the PR:O 12 MA, HK Audio Mono Tilt™
with a 3° angle tilt for the PR:O 8 A)
The HK AUDIO DuoTilt™ pole mount lets you align
PREMIUM PR:O active cabinets along the horizon-
tal plane to prevent or reduce troublesome ceiling
reflections. The front aperture of the HK AUDIO
DuoTilt™ provides a 3° angle, the rear aperture a 7°
angle of tilt.
If you set the full-range cabinets on a fully extended
cabinet tripod or mounting pole, opt for the 7° ang-
le. This setting works especially well when addres-
sing fewer listeners standing close to the speakers.
If you wish to address more listeners further from
the speakers, opt for the 3° angle on the HK AUDIO
DuoTilt™.
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