6. BREAKER
This is a resettable circuit breaker that monitors the amount of current being drawn by the amplifier. 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 amplifier 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 amplifier 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 amplifier. Refer to “Appendix A:
Service Info.”
7. SPEAKER OUTPUTS
You have two options for connecting your speakers: binding posts and Speakon connectors.
Normally, you would use either the binding posts or the Speakon connectors. Since the connectors are wired in parallel (e.g., CHANNEL 1 binding post and Speakon are in parallel, and CHANNEL 2 binding post and Speakon are in parallel), you can connect a speaker to each connector, as long as the total impedance per channel is two ohms or more.
•Two 8 ohm speakers in parallel equals 4 ohms.
•Two 4 ohm speakers in parallel equals 2 ohms.
See “Output Wiring” on page 11 for information on output connection wiring.
8. INPUTS
The Juice amplifiers give you two options for connecting the input signal — XLR input connectors and 1/4” TRS
Since these two inputs are in parallel, you shouldn’t connect more than one source to the INPUT 1 or INPUT 2 jacks. However, you can use the unused input jack as a “Thru” connector, to
9. SUBSONIC FILTER
Turn this switch on to engage a
most speakers can’t reproduce frequencies that low. By engaging the SUBSONIC FILTER, you allow the amplifier to power only the frequencies that you can hear. In addition, this filter 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 amplifier. 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 1 and CHANNEL 2 outputs. Each channel’s Level control adjusts the gain for its own channel.
MONO: This mode accepts a single input (INPUT 1), and routes it to both the CHANNEL 1 and CHANNEL 2 outputs. Each channel’s Level control adjusts the gain for its own channel.
BRIDGE: This mode accepts a single input (INPUT 1), and uses both amplifier outputs to double the power to one speaker (or set of speakers). Use the CHANNEL 1 Level control to adjust the gain (turn the CHANNEL 2 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 amplifiers 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 amplifier 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 amplifier, you must secure the rear support brackets of the amplifier to the back of the rack. You could use a support rail or 9
