Tapco Juice J-1400, Owner'S Manual

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6. BREAKER
This is a resettable circuit breaker that monitors
the amount of current being drawn by the amplifi er.
Under normal operating conditions, this should never
pop. An unusual condition may cause the breaker to
pop, such as a mains voltage surge occurring at the
same time as a peak amplifi er output.
Turn the POWER switch off, and push the BREAKER
button in to reset the circuit breaker. Turn the POWER
switch back on and the amplifi er should resume
normal operation. If the circuit breaker pops again,
something probably isn’t right.
• Make sure that the total impedance of the
speakers connected to the outputs is 2 ohms or
greater (per channel) in stereo mode, or 4 ohms or
greater in bridged mode.
• If the breaker pops right away, even with the
Level controls turned down and the speakers
disconnected, there may be something wrong
inside the amplifi er. Refer to “Appendix A: Service
Info.”
7. SPEAKER OUTPUTS
Connect your speakers to these Speakon output
jacks. There are three Speakon connectors on the
back of the Juice amplifi ers. Use the two outer
connectors (CHANNEL A and CHANNEL B) when using
stereo or mono modes. Use the center connector
(BRIDGED) when using bridge mode. See “Output
Wiring” on page 11 for information on output
connection wiring.
8. INPUTS
The Juice amplifi ers give you two options for
connecting the input signal — XLR input connectors
and 1/4” TRS (Tip-Ring-Sleeve) connectors. These
inputs are in parallel, and are identical, electrically
speaking. You can connect either a balanced or an
unbalanced signal here.
Since these two inputs are in parallel, you shouldn’t
connect more than one source to the INPUT A or
INPUT B jacks. However, you can use the unused input
jack as a “Thru” connector, to daisy-chain the signal
to another amplifi er. See “Input Wiring” on page 10 for
information on input connection wiring.
9. SUBSONIC FILTER
Turn this switch on to engage a low-frequency
cutoff (high-pass) fi lter at 30 Hz. The Juice amplifi ers
can amplify signals below 20 Hz, but most speakers
can’t reproduce frequencies that low. By engaging
the SUBSONIC FILTER, you allow the amplifi er to power
only the frequencies that you can hear. In addition,
this fi lter can remove low-frequency stage noise
(footsteps) and accidental microphone pops that
could damage a loudspeaker.
10. CLIP LIMIT
The CLIP LIMIT switch is there to protect your
loudspeakers from the effects of clipping. It is
designed to be virtually transparent, meaning you
probably won’t even notice any audible difference
when the switch is turned on.
We recommend that you leave this switch on at all
times. However, if you are working at quiet levels, or
you have already placed a compressor/limiter in the
signal path, you can leave the CLIP LIMIT switch off.
11. AMP MODE
This switch determines the input signal routing within
the amplifi er. For most applications, you will use the
STEREO setting. However, some applications might be
better suited for using either the MONO or the BRIDGE
setting.
STEREO: This mode accepts separate left and right
inputs (A and B), and routes them to the CHANNEL A
and CHANNEL B outputs. Each channel’s Level control
adjusts the gain for its own channel.
MONO: This mode accepts a single input (INPUT A),
and routes it to both the CHANNEL A and CHANNEL B
outputs. Each channel’s Level control adjusts the gain
for its own channel.
BRIDGE: This mode accepts a single input (INPUT A),
and uses both amplifi er outputs to double the power
to one speaker (or set of speakers). Use the Channel A
Level control to adjust the gain (turn the Channel B
Level control all the way down). See “Output Wiring”
on page 11 for information on how to connect a
speaker in Bridge mode.
GENERAL PRECAUTIONS AND
CONSIDERATIONS
Rack Mounting
The Juice amplifi ers are designed to be mounted
in a standard rack. They require two rack spaces
(2U = 3.5”). They also require 15.75” depth inside
the rack, including the rear support brackets. When
designing your rack, put the heavier items at the
bottom and the lighter items toward the top.
Secure the front panel of the amplifi er to the front
of the rack using four screws with soft washers to
prevent scratching the panel. In addition, because
of the weight of the amplifi er, you must secure the
rear support brackets of the amplifi er to the back of
the rack. You could use a support rail or shelf across
the back of the rack, or angle brackets attached
between the rear support rails and the rear rails of
the rack. This is recommended for all components
mounted in a rack that is going to be moved
frequently (or thrown in the back of a pickup truck
and transported down a bumpy gravel road to that
outdoor festival!).