ART Pro Audio EQ341 - Dual 15 band EQ - Manual (Page 5)

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GENERAL INFORMATION
Your ART equalizer is a professional quality unit perfect for virtually any audio application where
frequency tailoring is needed. It’s features include: constant-Q circuitry with accurate center
frequencies, selectable ±6dB or ±12dB range, active balanced and unbalanced input and output
connectors, RFI filters, independent variable Hi Pass (low cut) and Low Pass (high cut) filters (for the
EQ351 and EQ355), variable input level control, passive bypass switch, clip level indicator, ground lift
switch, and selectable line voltage. Rugged construction and solid audio performance make these
equalizers particularly well suited to fixed installation as well as touring live sound systems.
INSTALLATION
This series of equalizers are designed for mounting in a standard 19” equipment rack or one of the
many rack-type portable cases available on the market. The vertical height is 1.75 inches for the
EQ351 and EQ341, and 3.5 inches for the EQ355. The depth is 7 inches, exclusive of the power
cord.
POWER CONNECTORS
These equalizers have internal power supplies and are designed for operation with 120 or 240 volt
(as determined by the rear panel line voltage switch), 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 EQ300 series graphic equalizers have three sets of input and output connectors wired in parallel:
1/4" phone, XLR, and RCA connectors. Only one of the three inputs should be used per channel. Any
combination of output connectors may be used.
1/4" phone jack connections may be used balanced or unbalanced. When balanced, the tip is High
(+), the ring is Low (-) and the sleeve is Ground. To use unbalanced, use a mono 1/4” phone cable,
which will automatically ground the ring to the sleeve.
XLR connections are balanced where pin 2 is High (+), pin 3 is Low (-), and pin 1 is Ground.
RCA jack connections are unbalanced.
SIGNAL LEVELS
Signal levels from -10dBm to +4dBm are considered normal with maximum levels of approximately
+18dBm balanced or +22dBm unbalanced. 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.