Table of Contents
Advertisement
All the larger models (HT312A, AOW312, HT315A, HT320AC, HT324A, HT324AC, HT330A, 1035B and
1036A) have XLR balanced line inputs only.
It is always preferable, where there is a choice, to use XLR balanced line cabling due to increased
noise immunity on long cable runs around the room, even in electrically clean environments. Only the
most expensive surround sound processors have balanced outputs and, in some cases, only some of
the outputs are balanced so a method must be used to convert the unbalanced RCA to a true balanced
line signal. Therefore, Genelec has created the DI8A Active Balancer to solve these cabling problems
and to make installations simpler. Genelec recommends that this unit is specified whenever possible in
a Genelec installation. In addition to eliminating RF problems, it should also prevent ground loop hums.
See Section 1.4 1. DI8A.
2.12.4
Remote Control Cables
Any standard 2 core cable can be connected to the remote control inputs. There are 4 pins on the loud-
speaker remote control inputs that work in two groups (The RAM2 amplifier for AIW25 and AIC25 has
only two pins for the 12 V trigger type control). Do not attempt to use both remote control function at the
same time. Note also that the remote control function will override the 'Autostart' dip switch function on
the electronics panel when the 'Remote Control' switch is selected.
12V DC Remote
Pin 1 and 2 can be connected to a 12V DC Remote switch. If Pin 1 is set to +12 V the loudspeaker
is "ON". Setting Pin 1 to 0 V forces the loudspeaker into "Standby" mode. Pin 2 is the ground con-
nection.
External Switch or Relay
Pin 3 and 4 can be connected to an external switch or relay. If the switch/relay contact is closed,
then the loudspeaker is 'On' and when open it is then in 'Standby' mode.
2.12.5
Wiring the Cables
The input stages of all Genelec loudspeakers are designed to the highest standards, as used by broad-
casters and music studios all over the world. They have electronically balanced inputs. In other words,
transformers are not used so this means that the system is capable of electrically interfacing to either
balanced or unbalanced sources. There are five possible ways to connect surround sound processors
to Genelec loudspeakers:
XLR output - RCA input
This is not recommended as it is much better to use an XLR - XLR connection - see below.
XLR output - XLR input
This method is preferred over all the others mentioned in this section. As most surround sound
processors do not offer XLR outputs, a DI8A Active balancer can be used to convert the RCA
output of the processor to an XLR balanced line output.
RCA output - RCA input
This is the conventional method used in consumer electronics for connecting equipment. It is a
satisfactory method for short cable lengths, for example, between the DVD and processor or for the
front loudspeakers where the equipment is also located at the front of the room. It is susceptible to
electrical interference and is not recommended for longer cable lengths over 10 m (30 ft).
RCA output - XLR input
This connection method offers some improvement over the RCA-RCA method as the noise immu-
nity is improved. It is not a truly balanced connection so some cable manufacturers refer to it as
'semi-balanced'. The 2-core method shown below is preferred over the 1-core method as it gives
increased noise immunity and less signal distortion. It is important that all of the connections are
15
Advertisement
Table of Contents
