ART Pro Audio 310 - 2way/3way Crossover - Manual (Page 3)

3-way front-panel controls (reading from left to right):
Channel One controls-
Input Level - The mono input level control
Low Mute - Low output mute
Low Output Level Control - The low output level control
Frequency Range Switch and Control - low/mid crossover point
High Mute -
not used
High Output Level Control - not used
Channel Two controls-
Input Level -
not used
Low Mute - Mid output mute
Low Output Level Control - The mid output level control
Frequency Range Switch and Control - mid/high crossover point
High Mute - High output mute
High Output Level Control - High output level control
Signal Flow
The following is just a guideline. In most situations, the crossover is the
last piece of equipment in the signal chain before the power amplifiers.
Signal flow is as follows: From the output of the mixer to an equalizer
(Sometimes, for system protection, a limiter is placed between the mixer
outputs and the equalizer, or after the equalizer.) From the equalizer to
the crossover. From the crossover to the power amplifiers. From the
power amplifiers to the speaker cabinets.
Here are some tips to help you with your initial setup.
2-way set up:
1. Set all the levels controls to their full counter-clockwise position (off.)
2. Connect the outputs of your mixer (or equalizer) to the inputs of the
310. If stereo, Channel One is Left.
3. Connect the Low output of Channel One to the power amplifier power-
ing the low frequency cabinets (left).
4 . Connect the High output of Channel One to the power amplifier pow-
ering the high frequency cabinets (left).
5. Repeat for the right side of the system (Channel Two).
6. Set the crossover frequency for both channels (they should be the
same if your PA cabinets are the same).
7. With the power amplifier volume controls turned all the way down, turn
on all equipment in the system.
8. With a program source running through the system, turn up the power
amplifier volume controls and slowly turn up the crossover’s Input
controls. Check for clipping.
9. Turn up each of the crossover’s output level controls while checking
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amplifiers, you can turn down the output levels feeding the amplifier.
Additionally, you can use the output level controls to balance the level
between the highs and lows in your system.
Range Switch
The Range switch is used to set the frequency range of the Frequency
control. In its “out” (x1) position the frequency range is variable from 80Hz
- 920Hz, as is printed on the panel. In its “in” (x10) position the frequency
range is variable from 800Hz - 9200 kHz.
When used as a 2-way crossover, the Range switch will probably be used
in its “out” position.
When used as a 3-way crossover the Range switch for Channel One
(now the low/mid crossover point) will probably be used in its “out” posi-
tion while the Range switch for Channel Two (now the mid/high crossover
point) will probably be used in its “in” position.
Never change the frequency range switches (from x10 to x1 position
- or vice versa) with the crossover passing audio signals. Transients
can result and speaker damage is possible.
Frequency Control
Each channel of the 310 has a Frequency control which sets the
crossover point for the high and low frequencies. All frequencies below
the set frequency will be sent to the Low output and all frequencies above
the set frequency will be sent to the High output.
When used as a 3-way crossover the Frequency control for Channel One
is used to set the low/mid frequency point. The Frequency control for
Channel Two is used to set the mid/high frequency point.
Operating Instructions
The 310 crossover’s intended use is to split the frequency of the input
signal into two (when used as a 2-Way crossover) or three (when used as
a 3-Way crossover) separate signals which are then sent to amplifiers in
a sound system.
When used as a 3-way crossover you must follow the labeling for 3-way
operation of the controls.
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