Tapco Juice J-800, Owner'S Manual

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10
Thermal Considerations
The Juice amplifi ers are fan-cooled with two
separate fans. One fan brings cool air in from the
back and the other fan blows the warm air out the
front of the chassis. Make sure that cool air is available
at the back of the amplifi er, and that there is room in
the front for the warm air to exit from the amplifi er and
dissipate. If rack-mounted, make sure the air being
drawn from the rack is cool. Some rack-mounted
equipment expel warm air into the rack.
When the amplifi er is fi rst turned on, the fans run at
low speed. As the power output increases and the
amp warms up, the fans gradually increase in speed
to provide additional cooling.
AC Power Considerations
Be sure the amplifi er is plugged into an AC outlet
that is able to supply the specifi ed voltage. Be sure
the AC outlet can supply enough current to allow
full power operation of all the amplifi ers plugged into
it. The outlet should be a three-prong socket that
matches the power cord.
WARNING: Bypassing the plug’s
safety ground pin can be dangerous.
Don’t do it!
The AC current demand of an amplifi er varies
depending on several factors, including the load
impedance, the crest factor, and the duty cycle
of the program material. Under typical conditions
reproducing rock music where musical peaks are
just below clipping, the Juice amplifi ers require the
following average currents.
J•800 = 5 A
J•1400 = 7 A
J•2500 =10 A
It is recommended that a stiff supply of AC power
be used because the amplifi er places high current
demands on the AC line. The more power that is
available on the line, the louder the amplifi er will play
and the more peak output power will be available for
cleaner, punchier bass.
If you have more than one amplifi er sharing an
AC outlet, you should avoid turning them all on at
the same time. Rather, sequence them on, one at a
time, to prevent popping the circuit breaker (due to
in-rush current).
Input Wiring
Use a high-quality 3-conductor shielded cable to
connect the signal between the signal source (mixing
console, equalizer, etc.) and the balanced inputs
to the amplifi er. If you are using unbalanced inputs,
use a high-quality 2-conductor shielded cable. Your
TAPCO Dealer can recommend a suitable cable for
your application.
When connecting a balanced signal, the
connectors are wired thusly, according to the AES
(Audio Engineering Society) standards:
XLR TRS
Hot (+) Pin 2 Tip
Cold (–) Pin 3 Ring
Shield (Gnd) Pin 1 Shield
2
3
1
SHIELD
COLD
HOT
SHIELD
COLD
HOT
3
2
1
Balanced XLR Connector
SLEEVE
TIP SLEEVE
TIP
RING
RING
TIP
SLEEVE RING
Balanced 1/4 " TRS Plug
Unbalanced TS (Tip-Sleeve) lines can be
accommodated via the TRS jack. Make sure the cord
terminates with a TS plug (like a guitar plug), or if it is a
TRS plug (like a headphone plug), make sure the ring
is tied to the shield, preferably at the source.
SLEEVE
TIP
TIP SLEEVE
TIP
SLEEVE
Unbalanced 1/4 " TS Plug
If you set the AMP MODE switch to
MONO or BRIDGE, use the INPUT A
input only.