MACKIE FR1400 - Manual (Page 10)

10
FR SERIES AMPLIFIERS
FR SERIES AMPLIFIERS
11. FAN VENTS
Do not obstruct the ventilation openings of the ampli-
fier.
1. SPEAKER OUTPUTS
There are 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.
When the amplifier is used in bridged mono mode, use
either the center Speakon, or the two red binding posts
to connect your single speaker.
1. 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.
• There are no user-serviceable parts inside.
Please refer to the “Repair” section on page 13
for instructions on how to proceed.
14. POWER CORD SOCKET
Here is where you connect the detachable power cord
included with your amplifier. Plug the other end of the
power cord into an AC outlet properly configured with
the voltage required for your particular model.
Be sure the AC outlet can supply enough current to
allow full power operation of all the amplifiers plugged
into it. The outlet should be a three-prong socket that
matches the power cord.
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