Front Panel - GENZLER ACOUSTIC ARRAY PRO Owner's Manual

FRONT PANEL

he ACOUSTIC ARRAY™ PRO offers a full featured preamp design with 2 identical channels.
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MIC INPUT – This jack is a balanced XLR microphone level input which contains an "RFI" filter (radio frequency
interference) to eliminate unwanted noise. It also provides IEC P12(L) phantom power (12 volt) which works well with
most microphones found in the live sound industry. If a microphone requiring a higher voltage is to be used then an
appropriate external phantom power supply can be added in line.
NOTE – To prevent audible pops and unwanted noises, it is recommended that you turn down the PREAMP VOLUME on
the appropriate channel anytime you are connecting to or disconnecting from the MIC inputs.
INST INPUT – This jack is a standard ¼" unbalanced instrument input. The INST input stage contains an FET input
buffer circuit with an input impedance of 5 Meg ohms, a 40 Hz active high pass filter, and an "RFI" filter to eliminate
unwanted noise.
COMBINING MIC AND INST INPUTS – A unique feature of the ACOUSTIC ARRAY™ PRO is the ability to mix the MIC
(XLR balanced) and INST (¼" unbalanced) inputs. This effectively allows the amplifier to function as a 4 channel
amplifier. The most effective way to use this feature is to first set the PREAMP VOLUME, CONTOUR, and
EQUALIZATION on the desired channel using the MIC input and then adjust the level and tone controls on the instrument
itself (assuming that it has them) to blend the levels and tone between the MIC and INST inputs. The amp's channel
EQUALIZATION and CONTOUR will be common to both the MIC and INST inputs for that channel.
CLIP LED – This LED shows the operating status of the preamp channels and EQUALIZATION stages. When this LED
flashes, clipping of the preamp channels or EQUALIZATION stages is occurring or about to occur. Adjusting the
PREAMP VOLUME or the relevant EQUALIZATION controls down will remove the clip condition. Adjust the final overall
volume with the amp's MASTER VOLUME.
PREAMP VOLUME – This control sets the preamp's input volume level for both the MIC and INST inputs.
PHASE SWITCH – This switch reverses the phase of the instrument's signal. By reversing the phase, feedback can be
reduced if caused by sympathetic vibrations between the speaker system and the instrument. Under some conditions,
changing the phase can drastically improve the acoustic output from the amplifier and can improve the playability of the
instrument.
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