ART Pro Audio XL231 - Dual 31-Band, 1/3 Octave, Graphic EQ - Manual (Page 5)

ART XL 231 Dual 31 Band, 1/3 Octave Extended, Long Throw, Professional Equalizer
5
GENERAL INFORMATION
Congratulations on the purchase of your new ART equalizer. This professional equalizer
is perfect for virtually any audio application where frequency tailoring is needed.
INSTALLATION
This equalizer is designed for mounting in a standard 19” equipment rack or rack type
portable case. It is 3 standard rack units in height or 5.25 inches. The depth is 7 inches
behind the front panel.
POWER CONNECTORS
This equalizer has internal power supplies designed for operation with 120 or 240 Volt
(as determined by the rear fuse block orientation), 50-60Hz mains supply. In new
installations and portable sound systems, or any situation where the mains power is in
question, it is wise to confirm the voltage and select the appropriate line voltage setting
BEFORE connecting the equalizer to power sources.
INPUT/OUTPUT CONNECTIONS
The XL 231 has three sets of input and output connectors. These connections include
XLR, ¼” balanced or unbalanced phone, and detachable Euroblock barrier strip
connectors. The inputs are wired in parallel. The XLR and Euroblock output connections
are also wired in parallel. A separate output circuit is used for the ¼” phone outputs
which provides the same output level when used with either balanced, or unbalanced
connections.
For optimum performance use balanced connections. Balanced connections help
eliminate external sources of electrical noise.
EUROBLOCK CONNECTIONS
Insert the wires, and then snug down with the set screw. The entire barrier strip can be
detached for quick service without disconnecting the individual wires.
SIGNAL LEVELS
Signal levels from -10dBu to +4dBu are considered normal with maximum levels of
approximately +24dBu. Do not connect microphones directly to the equalizer. Most
microphones, as well as instrument pickups, require a preamp to get the signal level up
to a line level.
The outputs of the equalizer are also designed to connect into line level inputs and
should not be connected into sensitive microphone or instrument inputs for best results.
Please refer to the APPLICATION NOTES for more information on operation levels.