I N S TA L L AT I O N
PAG E 7
AV 2 . 2 P / AV 2 . 4 P – O P E R AT I O N M A N UA L
Power Requirements
Power consumption for your model AV2.2P / AV2.4P amplifier is indicated on
the rear panel for maximum output.
Ensure that mains voltage is the same as the rear panel mains voltage marker
(+/- 10%).
Mounting
The amplifier is designed as a table top model as well as for standard 19” rack
mounting.
The AV2.2P occupies 1 EIA rack unit (1.75”/44.45mm).
The AV2.4P occupies 2 EIA rack units (3.5”/88.9mm).
The rack mounting ears are packed separately with the amplifier.
The mounting centres for the AV2.2P rack ears are:
Vertical: 1.26” (32mm)
Horizontal: 18.4” (467.36mm)
The mounting centres for the AV2.4P rack ears are:
Vertical: 3” (76.2mm)
Horizontal: 18.4” (467.36mm)
The slots in the mounting flange will accept bolt diameters up to 1/4” (6.35mm).
We recommend that you provide additional support for the amplifier,
This support can be provided by secure shelving, support rails or a rear rack
mounting strip to match up with the rear rack mount ears provided on your
AV2.2P/AV2.4P amplifier.
Cooling
Both the AV2.2P and AV2.4P uses a convection cooling system. The cabinet is
designed to it allow the heat sink surface to cool efficiently. One rack space
should be provided above and below the amplifier for maximum cooling.
An unrestricted airflow to the unit must be provided. Any restriction of the air
flow will cause heat to build up within the amplifier.
If the amplifier is to be operated in an environment where the airflow is
restricted (such as in sealed racks) cooling should be supplemented by cooling
fans to evacuate the heated air and boost the flow of cool air.
Input Wiring
IMPORTANT: Do not directly connect pin 1 on the amplifier’s input
or strapping XLR to the amplifier’s chassis, speaker ground or power
ground!
WARNING: Input signal ground is not to be used as a safety
ground (earth)
The input to the amplifier is a balanced 3-pin configuration and requires all
three pins to be connected. Only high quality twin-core shielded cable should
be used.
When wiring for a balanced source, the connector going to the input of the
amplifier should be wired as follows:
Pin 1 =GROUND/ SHIELD.
Pin 2 =HOT(In Phase - non inverting).
Pin 3 =COLD(Reverse Phase - inverting).
When wiring from an unbalanced source you ensure that pin 3 is connected to
pin 1 (input ground), either by linking the pins in the input connector or by the
source equipment’s output wiring.
When wiring for an unbalanced source:
Pin 1 =GROUND/SHIELD,
Pin 2 =HOT(in phase with the amplifier’s output),
Pin 3 = GROUND/SHIELD (joins to pin 1).
NOTE: In-line XLR connectors often have a termination lug that connects
directly to the chassis of the connector.
IMPORTANT: Do not link this lug to pin 1 at the amplifier’s input as it
will defeat the amplifier’s input grounding scheme.
Output Wiring
When wiring to your speakers always use the largest gauge wire your con-
nector will accept. The longer the speaker lead, the greater the losses will be,
resulting in reduced power and less damping at the load. We recommend using
a heavy duty, two core flex (four core flex if bi-amping) 10 to 12 gauge (2mm to
2.5mm or 50/0.25 or equivalent) as a minimum.
When terminating to the 4mm binding post (banana jack) output connectors,
banana plugs or bare wires can be used. The red terminal is positive and the
black terminal is negative (ground).
If running in BRIDGE mode, only the red binding posts are used.
