TM400X4ad — Amplifier Tuning Guide, page 1
2014 or NEWER Harley-Davidson®
TM400X4ad Amplifier Tuning
MOTORCYCLE AUDIO
#ROCKFORDFOSGATE
Boom!™Box
Standard 4.3
Boom!™Box
Premium 6.5GT
Boom!™Box
Premium GTS
RADIO FLASH REQUIRED
”Rockford Fosgate Tune 2014+ All Models”
REMOTE TURN-ON REQUIRED
use turn-on from brake side
REAR INPUT LEVEL: 12:00 (1/2)
Matches the amp to the radio.
Tells the amp where to “clip.”
FRONT INPUT LEVEL: 11:00-12:00
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: 2CH
Number of inputs to feed amp.
Flashing radio only allows
2-ch output from radio.
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]
