• remote power switch connector
• right and left channel inputs (single-ended non-inverting, single-ended inverting and
differential inputs)
• right and left channel input impedance adjust
• AC power switch
• AC power connector
• AC line fuse
Operation with a single-ended output preamplifier
For standard operation, insert the interconnect cables from your preamp to the non-
inverting RCA inputs. Insert shorting plugs into each of the inverting RCA inputs. If you
desire inverted operation, reverse the above procedure. Either of the two paralleled
outputs can be used, or all four if you are bi-wiring your speakers.
Operation with a balanced output preamplifier
Insert the output of your preamplifier into either the differential XLR input or both
the single-ended inverting and non-inverting RCA inputs. You can then utilize either of
the two paralleled outputs, or all four if you are bi-wiring your speakers.
Basic Troubleshooting
If your amplifier does not turn on:
1. Make sure the power cord is connected to both the inlet at the back of the amp and
an appropriate AC power source.
2. Check the power supply fuses located next to the AC inlet; there are two fuses--one is
a spare.
If your amplifier shuts down after being turned on, with or without the presence of
signal:
1. Check the rail fuses; on the Model 7, these are located on the inside of the amp
adjacent to the encapsulated transformer. A fuse can often look good even if it is
actually bad. If possible, check the fuses with a meter.
2. If the fuses are good, disconnect the inputs from the amp and see if it will power up
again. Your amplifier will generally only shut down if it senses DC, thus protecting your
speakers. Certain associated equipment can occasionally pass DC.
If the above suggestions do not work or you are having other problems,
please contact your Jeff Rowland Design Group dealer.
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