RFK-HD9813 — Amplifier Tuning Guide, page 1
1998-2013 Harley-Davidson®
TM400X4ad Amplifier Tuning
2nd Generation Kits Using RFK-HD9813 Harness Kit.
MOTORCYCLE AUDIO
#ROCKFORDFOSGATE
Harman-Kardon
Factory Radio
RADIO O.K.
no flash required
TURN-ON O.K.
remote wire not required
REAR INPUT LEVEL: 9:00 (1/4)
Matches the amp to the radio.
Tells the amp where to "clip."
FRONT INPUT LEVEL: MIN to 9:00
When using baglids or TourPak,
reduce fairing speaker output
by trimming level until front &
rear are equally balanced.
FRONT & REAR EQUALIZER: MIN
Adds bass & treble to
enclosed vehicles.
Not used on motorcycles.
INPUT SWITCH: 4CH
Number of inputs to feed amp.
Requires rear speaker harness
included in RFK-HD9813
for 4-channel fading.
CROSSOVER FREQUENCY: 80Hz
Tells amp what frequencies to pass.
Motorcycles use this as a "bass blocker"
to prevent subwoofer frequencies from
damaging fairing and baglid speakers.
(works with HP/AP/LP switch)
CROSSOVER SWITCH: HP (High-Pass)
Type of crossover needed.
(works with crossover frequency dial)
[HP (High-Pass) allows frequencies above to pass]
[AP (All-Pass) allows all frequencies to pass]
[LP (Low-Pass) allows frequencies below to pass]
09-06-2019 Eric Russell
1220-72884-03-A
