Please be aware that electronically balanced, Phoenix-type inputs are provided on all channels. Follow the +,– and Ground labels when connecting the input signal.
If an unbalanced connection is desired this can be achieved by summing the minus (“COLD”) and Ground terminals and using the + terminal as the “HOT” signal.
For the best possible performance, the summing of ground and minus wires should be done at the source unit end of the cable.
Connectors are supplied for attaching cables to the inputs. Compatible input connectors are Phoenix Contacts, Part number MSTB 2.5/3-STZ-5.08, or Anytek OQ03545100CCG.
When linking the same source signal to several input channels, be aware that there is a limit to the number of channels an output source can drive. A typical output source can drive up to four amplifier channels before line-drivers would be required to boost the signal.
When it comes to output operations and connections this unit has detachable block-connectors with + and – poles are provided at each channel output for connection of the speakers.
If more connectors are needed, then these are compatible:
Please make sure that the speaker cables are connected correctly and tightly, and that accurate polarity is maintained to all speakers in the system.
As the amplifier outputs produce high voltage, do not connect or disconnect speaker cables when the mains power is on.
On another important point the E Series is designed with inherently bridged outputs for a high voltage swing, with full headroom accessed in the 70 V mode. So, in some ways the amplifier is a 4-channel amplifier with permanently bridged outputs which turns it into a 2 channel amplifier.
This design also accommodates asymmetric loading, wherein only one channel can be connected and draw all power from the power supply. Alternatively, one channel can be connected and configured as a “high power” channel while another is connected and configured as a “low power” channel.
For example, a 4-ohm loudspeaker could draw all the power available from the power supply in one channel when it is the only loudspeaker connected to the amplifier.
If another channel is connected, any power used by this second “low power” channel will limit the “high power” channel from using all available power.
The power available in each channel is determined by the setting of the RSL switch and the impedance of the connected load.
Power available per channel in some typical applications is shown in the following sample tables.
Please note that because the two channels are identical, the channels are reversible.
If settings of channel 2 are same as for channel 1, then options for channel 1 are same as for channel 2 below.
From one perspective, the functionality of asymmetric loading is very intuitive: essentially, power not used in one channel is available through the other channel, but within limits determined by the load impedances for each channel and the setting of the RSL switch.
However, the possible combinations are many, and performance limitations may apply in some scenarios.
Keywords: LAB.GRUPPEN; E4:4; E8:2; E12:2