Lab.gruppen IPD 2400 - Manual (Page 11)

6. Amplifier connections
IPD SERIES Operation Manual rev 1.0.0
11
6. Amplifier connections
6.1. AC line input / operating voltage
All IPD Series amplifiers have a universal power supply that operates on mains from 100 - 240 V at 50 or
60 Hz. The IEC receptacle on the rear panel accepts the supplied IEC cord which terminates in a connector plug
appropriate for the country of sale. When AC power is connected, the amplifier goes into standby (red indication
on standby LED). The amplifier may be turned on by pressing the front power button or remotely using the
IntelliDrive Controller software.
Signal ground is floating via a resistor to chassis, and therefore grounding is automatic. For safety reasons,
never disconnect the earth (ground) pin on the AC power cord. Use balanced input connections to avoid hum
and interference.
6.2. Audio inputs
Analog inputs - Analog inputs are available on two standard XLR-F latching connectors. The inputs are
electronically balanced. The impedance is 20 kohms, and the inputs can accept a maximum input level of
+26 dBu. Polarity is as follows:
Pin 1 = screen (shield), pin 2 = positive (+), pin 3 = negative (-).
Analog links - Two latching XLR-M connectors are fitted adjacent to the analog input connectors and are
paralleled to the respective input connectors; they provide an unprocessed analog loop-through signal to feed
additional IPD Series units or other equipment.
AES3 inputs - A latching XLR-F connector accepts an AES3 digital audio signal. Input impedance is 110 ohms.
Ensure that 110 ohm digital audio cables are used; standard XLR microphone cables are rarely suitable for reliable
digital audio transmission.
Note: AES3 is a stereo digital format, and therefore both inputs are fed via a single connector. Selection of the
analog or digital inputs is made via the front panel display or IntelliDrive Controller software.
AES3 link - A latching XLR-M connector is fitted adjacent to the AES3 input connector. This is an active link which
sends an unprocessed AES3 loop-thru to feed additional IPD units. The design requires no termination load when
the unit is the last connected.