9
Figure 7. Configuring for AES67/ST2110 streams in the Dante controller.
ANALOG INPUT
An analogue audio input is provided using a screw-mount Euroblock connector.
This enables easy connectivity and daisy-chaining the balanced audio signal to
several loudspeakers. When you daisy-chain loudspeakers, connect a second
signal cable to the plug (Figure 8).
The input impedance of the analogue input is 10 kOhm. The pin sequence of the
connector is shown in Figure 8. The number of loudspeakers that can be on the
same daisy chain is set by the capability of the source device analogue output.
The daisy-chained loudspeakers appear electrically in parallel, reducing the load
impedance presented to the source device. Typically, 10 to 20 loudspeakers can
be daisy-chained on one balanced line.
Avoid connecting 4420A to the power amplifier outputs. If this must be done, use
a balanced attenuator. Typically, an attenuation of about 20 dB is needed.
Beware that some power amplifiers can provide a signal that exceeds the
maximum voltage at the analogue input, and this can result in failure of the
analogue input.
Summary of Contents for 4420A
Page 1: ...4420A Operating Manual ...
