Viola Symphony Manual Rev 1
5 of 15
9
th
September 2005
personal injury and you may also cause serious damage to the unit which will void
the warranty.
LOCATION
We recommend that you place the amplifier as close to the loudspeakers as possible,
as this reduces the length of speaker cable required. Whilst this make it necessary
to use longer interconnect cables, long interconnects cause less sonic degradation
than long speaker cables.
The unit may be placed on a stand or shelf, provided it is strong enough.
Alternatively it may be placed directly onto the floor. In this case, please ensure that
that the ventilation slots on the base of the unit are not obstructed by carpeting or
other floor covering.
In all locations please allow a clearance of at least 3.5” (5cm) above the unit. You
must also allow a clearance of at least 6” (15 cm) behind the unit, to enable the
cables to be routed without being subject undue strain.
Regardless of where you locate your amplifier, we advise positioning it well away
from sensitive low signal level components such as pre-amplifiers and turntables.
The Symphony power amplifier dissipates approximately 225 watts as heat when
idling (i.e. no input signal). It is normal and perfectly safe for it to run somewhat
warm to the touch.
XLR CONNECTOR PIN ASSIGNMENT
The Symphony is fitted with XLR and Fischer type balanced inputs. The pin
assignments of the Symphony’s XLR input conforms to the AES 14 standard, which is
now commonly used throughout the audio industry. These assignments are shown
below:
Pin 1:
Signal ground
Pin 2:
(non-inverting)
Pin 3:
Signal - (inverting)
Connector shell:
Chassis ground
Some equipment may have the polarity of the signals on pins 2 and 3 of the XLR
connectors swapped over. Please refer to the user manuals of the other equipment
in your signal chain to confirm whether this is the case.
If this is the case, it will not cause any damage, but it may reduce the quality of the
stereo image, as well as the perceived attack of the bass. This situation is easily
remedied by swapping the connections of pins 2 and 3 at either end of one of one set
of balanced cables in the signal chain. Alternatively you can swap over the polarity
of the speaker leads on both channels. Your dealer should be able to advise you on
the best course of action.
If two items in the signal path have the connections to pins 2 and 3 of the XLR
connector reversed with respect to the AES standard, this cancels out the problem
and you need take no further action.
