MB QUART MBQR-RAD-2 Instruction Manual page 39

Wiring and Connections
● We recommend wire-to-wire connections such as power, ground and
speaker wiring are soldered and protected with either heat shrink tubing
or high quality electrical tape.
● The main (yellow) power wire should be connected to a source with at
least 10 amps of additional current capability to support the unit.
Wire Color
Black
Blue
Green
Green/Black
Gray/Black
Gray
Purple
Purple/Black
Red
White
White/Black
Yellow
Purple/White
Orange
Preamp Level Audio Connections
● Front and rear RCA preamp outputs are labeled as such. These are
intended to be connected to external amplifiers, not included.
● Subwoofer RCA outputs (green RCAs) are mono and paralleled.
They are identical subwoofer audio signals. Their frequency range is
controlled by the low pass crossover and the subwoofer level control.
Both are found in SETTINGS. See Page 18. We recommend starting
with 100Hz for the low pass crossover point.
● The unit offers a zone control feature to balance sound levels
between different zones. The front and/or rear RCA outputs (using
external amplifiers) are one zone. The source unit's built-in power is
the other zone. An example is a boat having separate volume control of
amplified wakeboard tower speakers versus cabin speakers positioned
closer to listeners using the unit's built-in power. Zone level control is
found in SETTINGS. See page 18. Subwoofer RCA outputs or speaker-
level outputs are unaffected by the zone level control. All work with the
main volume.
4
Location
Plug Pin A
Plug Pin B
Plug Pin C
Plug Pin D
Plug Pin E
Plug Pin F
Plug Pin G
Plug Pin H
Plug Pin J
Plug Pin K
Plug Pin L
Plug Pin M
Harness
Harness
Function
Negative Chassis Ground (-)
Amp Turn-On (+12v Output)
Left Rear Speaker (+)
Left Rear Speaker (-)
Right Front Speaker (+)
Right Front Speaker (-)
Right Rear Speaker (+)
Right Rear Speaker (-)
+12 volt Accessory
Left Front Speaker (+)
Left Front Speaker (-)
+12 volt Constant (>10a)
Reverse Camera +12v Input
+12 volt Illumination