CONNECTIONS
INPUTS
The inputs are made via 3-pin XLR connectors, which are electronically balanced and should be connected via a
high grade twin core screened cable, as follows:
PIN2 - Hot (). Signal Hot.
PIN3 - Cold (signal -). Signal Cold.
PIN1 - Screen (see note).
Connected to the chassis of the unbalanced equipment or left disconnected at the unbalanced end.
The amplifier is designed to operate with fully balanced equipment and ground loops or loss of performance
may be experienced if connected to unbalanced sources.
NOTE:
This amplifier is wired to the latest industry recommendations. PIN1 is connected directly to the chassis/-
mains earth. If ground loops (mains hum) are encountered remove the screen connection from the other end of
the cable and leave it open circuit. If problems persist, consult your dealer/supplier.
DO NOT TAMPER WITH OR ALTER ANY GROUND (EARTH) CONNECTIONS INSIDE THE AMPLIFIER.
D-10 & D-20: For bridged operation input should be made to channel A only and the rear panel switch set for
bridged mode. Channel B will then be fed out of phase with channel A.
D-100: For bridged operation input should be made to channel A (or C) only and the rear panel switch set for
bridged mode for the appropiate pair of channels.
OUTPUTS
The speaker outputs are via Neutrik Speakon connectors. Only 2 of the 4 poles are used. 2 pole (NL2FC) or 4 pole
(NL4FC) connectors can be used. Terminations are as follows :
HOT Pin +1
COLD Pin -1
Additionally Channel A Speakon connector carries Channel B output on Pins +2 & -2 to allow easy bi-amping or
bridged operation.
HOT Pin +2
COLD Pin -2
NOTE:
1.- Although the "cold" output terminals are nominally at 0V., they should not be joined together,
otherwi-se cross-talk may be introduced. 2.- Because the currents involved are very high, the speaker cables
should conform to the following minimum requirements, otherwise the losses will cause the cables to get hot
and audio power will be reduced: D10
-
12A
,
D20
-
16A
, D100 -20A
- all into 4ohm speaker loads.
NOTE:
Do not connect the inputs/outputs to any other voltage source such as a battery, mains source or power
supply, regardless of whether the amplifier is turned on or off. Do not run the output of any amplifier channel
back into another channel's input and do not parallel or series-connect an amplifier output with any other
amplifier output.
LINK SOCKET
Each channel is provided with a 3-pin XLR connector marked 'LINK' which allows the input signal to be linked to
further amplifiers etc. The connections are the same as for the input XLR.
BRIDGED (MONO) OPERATION
Use centre Speakon connector marked 'BRIDGED' and connect as follows:
HOT Pin +1 (Channel A - IN PHASE)
COLD Pin -1 (Channel B - OUT OF PHASE)
When operating in bridged mode, the minimum impedances are doubled. The minimum load in bridged mode
is: D-10: 4 ohms, D-20: 4 ohms
, D-100: 4 ohms
E11EVEN SOUND \
D series amplifiers
\
User’s Manual
9
