953.422UK User Manual
Placement
The A22 amplifier is supplied with 4 mounting
brackets, which can be fixed to the sides of the
housing with the tab facing upwards to enable
the A22 to be mounted under a counter-top
The A22 can even be mounted against a wall.
Alternatively, the A22 may be used free standing on any flat surface or 2 units can be
mounted side-by-side in a 19
”
rack with one mounting bracket facing forwards at each side,
occupying a 1U rack space (the 4 self-adhesive feet will need to be removed to allow this)
Speaker connections
The A22 has 2 speaker outputs - CH1 and CH2 - on a single removable screw terminal block,
which can be wired as Left and Right stereo outputs. (13, 14)
Connect the negative
“–”
screw terminal to the negative
“–” speaker terminal(s)
Connect the positive
“
+
”
screw terminal to the positive
“
+
” speaker terminal(s)
Use speakers with a combined impedance no lower than 4
Ω
for each output channel.
•
If each speaker being connected is 4
Ω
, then connect only 1 speaker to each channel.
•
If each speaker is 8
Ω
, you can connect 1 speaker or 2 speakers in parallel per channel.
•
Do not connect more speakers to either channel, as this may cause damage to the A22.
An example of wiring 8
Ω
speakers to the A22 is
shown opposite.
A single 8
Ω
speaker may be connected to a
channel or 2 may be connected in parallel to
present a combined 4
Ω
load to the output.
The impedance of the load, measured in
“Ohms”
(Ω)
, will also determine the power.
The amplifier delivers its maximum power
outp
ut at the minimum impedance rating (4Ω).
If the impedance is higher (e.g. 8
Ω
), then the
output from that channel will be lower.
The combined load on each output shares the
power from that amplifier channel.
This means that if two 8
Ω
speakers are connected to a single output in parallel, they will each
receive half of the full power. If the amplifier is delivering 50W to two 8
Ω
speakers connected
in parallel, they must each be able to handle 25W.
