7
These controls attenuate only (there is no gain). In most cases you would set them to
0
(fully
clockwise). You can use these controls to prevent overdriving the inputs of your amplifiers or to
compensate for variations in amplifier gain or speaker efficiency. Additionally, you can use these
controls to balance the level between highs and lows in your system.
CROSSOVER FREQUENCY CONTROLS and RANGE SWITCHES
Each channel of the CX310 has a crossover FREQUENCY control and RANGE switch to set the
crossover point for the high and low frequencies. These controls cover the frequency range of 80Hz -
920Hz, with the RANGE switch in the
out
position (x1), or 800Hz to 9.2kHz, with the RANGE switch
in the
in
position (x10). All frequencies below the set frequency will be sent to the LOW OUTPUT and
all frequencies above will be sent to the HIGH OUTPUT.
When the CX310 is used as a stereo 2-way crossover, both RANGE switches will most commonly be
used in the
out
position (80Hz-920Hz). When used as a mono 3-way crossover, the
Channel One
FREQUENCY control is used to set the Low/Mid frequency point and the
Channel Two
FREQUENCY control is used to set the Mid/High frequency point. In this case, the
Channel One
RANGE switch will most commonly be used in the
out
position (80Hz-920Hz), while the
Channel
Two
RANGE switch will most commonly be used in the
in
position (800Hz-9.2kHz).
The crossover filters are 4-pole Linkwitz-Riley designs (24dB/octave). This yields a sharp roll off to
help protect speakers and the outputs sum to a flat response.
NOTE:
Never change the frequency range switches (from x1 to x10 position - or vice versa) with the
crossover passing audio signals. This may produce transients that can damage speakers.
REAR PANEL CONNECTORS and CONTROLS
It is easy to interface the unit with a wide variety of equipment. The rear panel has balanced XLR and
1/4” phone jack connectors.
XLR JACKS
The XLR connections are balanced and follow the AES standard for wiring: Pin 1 = Ground, Pin 2 =
Hot (+) and Pin 3 = Cold (-). These connectors directly parallel the associated 1/4” connectors.
1/4” PHONE JACKS
The 1/4” connections are balanced with Tip = Hot (+), Ring = Cold (-), and Sleeve = Ground. A two-
conductor (tip and sleeve) shorts the Cold (-) and Ground connections together to convert to
unbalanced operation. Inserting a plug into a 1/4" jack disconnects the associated XLR connector.
MONO/STEREO MODE SWITCH
This switch configures the CX310 for stereo 2-way operation with the switch in the
out
position or for
mono 3-way operation with the switch in the
in
position.
