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Installation and Connections
AC Power Considerations
The majority of household electrical sockets (in places
other than the kitchen and garage) are 15 amperes maxi-
mum, which is sufficient to power your Sherbourn ampli-
fier. However, remember to account for the electrical pow-
er that other components will require if they share a com-
mon wall socket or electrical circuit. Most DVD players,
preamplifiers and A/V source units are fairly low current
items, and can successfully share a wall socket with your
power amplifier, but big screen TVs and video projectors
usually have minimum current requirements that can con-
sume nearly an entire circuit. Refer to the owner's manuals
of your audio/video devices to assess your electrical power
requirements for your home entertainment system. If you
have any questions relating to issues with the power
requirements for your Sherbourn amplifier, please contact
Sherbourn Support at: 1-615-791-4046.
Surge Protection - Along with built-in noise filtering, your
Sherbourn amplifier is equipped with overcurrent, under-
current, and spike protection.
Upon powering up your Sherbourn amplifier with the front
panel switch or via 3.5mm trigger input (switch on the rear
panel must be set to "ON"), you will notice the front panel
LED lighting starts off red for 5 seconds and then turns to
blue. This indicates the amplifier is "ON," functioning
normally, and ready for operation. If you do not see an
LED light or a blinking red LED light while the amplifier
is on during (otherwise) normal operation, please refer to
the troubleshooting section of this manual.
Physical Placement /Heat Considerations
Sherbourn series amplifiers employ convection cooling, which
is very effective and completely noiseless. Under normal
operating conditions, your Sherbourn amplifier will remain
cool to mildly warm, but considerations for heat should be
taken into account during placement.
Place your Sherbourn amplifier on a flat, level surface,
with the weight distributed equally on all four feet. If using
a cabinet or shelf, please make sure that there is sufficient
ventilation and there is at least 6 inches of free air space
above the amplifier and 3 inches on each side. If adequate
ventilation is not available, your may consider installing
two small brushless DC fans (such as those used in com-
puter cases) to provide continuous airflow around the unit.
If the amplifier is located on a carpeted surface, place a
board under the amplifier's feet.
Do NOT block the ventilation holes on the amplifier.
Your Sherbourn amplifier is equipped with a massive toroidal
power transformer. This transformer generates a magnetic
field that could induce a hum in a turntable (particularly a
turntable equipped with a moving coil cartridge).
Do NOT place a turntable directly above or directly
adjacent to the amplifier.
Before placing the amplifier on a shelf, verify that the weight
bearing capacity of the shelf is 80 lbs or greater. The am-
plifier is heavy and should be placed toward the bottom of
an audio rack to minimize the rack being unnecessarily top
heavy.
Input Connection Considerations
High quality, fully shielded RCA cables are recommended
for use with Sherbourn amplifiers. 'Twisted Pair' cables are
not recommended. Sherbourn amplifiers have an extreme-
ly high bandwidth, and twisted, non-shielded cables can
actually act as an 'antenna', receiving outside interference
and signals (EMI and RFI), which will cause the amplifier
to go into protect mode.
Whenever possible, keep preamplifier level audio cables
away from amplifier electrical power cords by at least a
few inches. Amplifier AC power cords are carrying much
more current than other source and preamplifier components,
which means there is a larger degree of noise or "hum" po-
tential with the amplifier power cord in close proximity.
Output Connection Considerations
The output connectors provided on each channel of Sher-
bourn amplifiers are standard "binding post" speaker con-
nectors with industry standard spacing. These are some-
times called 5-way binding posts because of the many
ways in which the speaker wire can connect into the posts.
The posts can accept bare wire, spade terminals, and dual
or single banana connectors. Spade connections or banana
plugs ensure a simple, solid fit in the terminal whereas
bare wire may be awkward when the terminal is screwed
down to compress the wire into place. Keep in mind that if
you use "dual banana" plugs and "stack" them, you will be
creating a parallel connection. For more details on series
and parallel connections, see pages 13-14.
It is important to observe polarity so that the speaker wire
connects to the red and black terminals on the amplifier
and the corresponding terminals at the speaker. Also, make
sure that the positive speaker wires do not touch the nega-
tive speaker wires, or any chassis metal. This will cause a
short circuit and activate the protection circuitry.
Connection Tips for Superior Sound
Before setting up your new system, please consider
the following:
• Always make sure the amplifier is turned off be-
fore making or changing ANY connections.
• Whenever possible, route the power cords away
from the signal cables or speaker wires to prevent
any hum
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