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19. Sum Preamp Output** – These RCA jacks provide a low-
level SUMMED MONO (L+R) output used to connect
amplifier(s) driving subwoofers.
20. Front/Rear Preamp Output – These RCA jacks provide a
low-level STEREO output used connect amplifier(s) driving
front & rear speakers.
21. CD Changer Input – This 8-pin DIN is used to connect an
optional RFX CD Changer to the source unit.
22. Power Connector – The 16-pin molex is used for power,
speaker, and AUX* connections.
23. Antenna Input – Connects a standard male Motorola
coaxial radio antenna to the source unit.
IMPORTANT: The communication BUS used in Rockford
Fosgate models RFX8210/8220/8230 is used only for CD
changer model RFX8810 and is not backward compatible
with older RFX models. Rockford Fosgate recommends
connecting only the appropriate RFX models together.
Rockford Fosgate does not assume responsibility when
using other manufacturers’ source units with Rockford
Fosgate CD changers (or vice versa).
10. PRESET 3/RDM – Selects radio preset #3 in TUNER mode
and selects tracks at random in CDP/CDX mode.
11. PRESET 4 – Selects radio preset #4 in TUNER mode.
12. PRESET 5 – Selects radio preset #5 in TUNER mode.
13. PRESET 6 – Selects radio preset #6 in TUNER mode.
14. TUNE/DISC – Manually tunes the radio station in TUNER
mode and selects previous/next disc in CDX mode.
15. RELEASE – Detaches the faceplace from the source unit.
16. LOUD – Enables bass response to be boosted at low and
high levels
17. AS/PS – Press and hold to store the strongest radio stations
in each tuner bank in AUTO STORE mode. Momentarily
press to scan each radio preset in PRESET SCAN mode.
18. MUTE – Mutes the audio in TUNER/AUX* modes and
pauses the disc in CDP/CDX mode.
*Feature available on RFX8230 only
**Feature available on RFX8220 & RFX8230 only
*Feature available on RFX8230 only