Hogtunes NCA 450-RM : 4 Channel Amplifier / 4x50 watts (2014 - model year) - Manual (Page 8)

Step #3: Attach the amp’s red wire to the positive (+) battery terminal and the
amp’s black wire to the negative (-) battery terminal. The factory battery
wiresarealsore-installedatthispoint.Whenattachingthepowerand
ground wires, it is always a good practice to do the negative first.
Whenthepositiveconnectortouchesthebattery,somesparkingis
normal. This is a function of the capacitors in the amplifier charging up.
Step #4: Turn the stereo on and, at low volume, test to make sure all four speakers
are working. If on an Ultra where the amp is powering front and rear
speakers in stock locations, make sure the radio’s fader control is
adjusting the volume between front and rear speakers. If not, double
check the “Fader/No Fader” switch.
NOTE: If this amp has the rear channels powering speaker lids, fairing
lower speakers or rears speakers on a Street Glide or other “non
Ultra” model, the rear channels will not work unless the fader/
no fader switch is in the “no fader” position. Don’t forget that
you can use the 3 position switch on the amp to adjust the rear
speakers volume in comparison to the front speaker. This is there
to allow you to adjust the “balance” of the system without
requiring a radio re-flash to make the radios fader work.
Step #5: Re-install the seat making sure the amplifier’s “+” and “-” connectors are
positioned in such away so they will not bend or break when the rider’s
weight is on the seat.
This is the best time to take a few minutes to “clean up” the wiring
and secure using supplied zip-ties.
Before re-installing outer fairing, turn front wheel
to each extreme side making sure any wiring is
not impeding the steering of the motorcycle.
Failure to do so can result in serious
injury or death!
Re-install the fairing and your system is now ready to enjoy!
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