MB QUART REFERENCE SERIES 4-CHANNEL AMPLIFIER RAA4200 - Manual (Page 12)

12
T
ROUBLESHOOTING
PROT (Protect) LED Comes On, Amplifier shuts down
Possible Cause
There is a short in the system
Amplifier has exceeded normal
operating temperature due to improper
ventilation.
Speaker impedance too low
Low battery voltage
Solution
Turn the system off. Check connection to all components for possible
shorts. Check all wires and cables for kinks, splices, poor insulation,
etc. Repair/replace if necessary.
Turn the system off and allow to cool. Verify adequate ventilation
around amplifier. Move the amplifier to a spot with better ventilation
if needed.
Check for proper speaker impedance, replace if needed.
Check that the vehicle charging system is maintaining proper voltage.
S
PECIFICATIONS
MODEL- R Series RAA4200
Continuous Power Rating (RMS) - Measured at 14.4 Battery Volts
4 Load Per Channel 100 Watts x 4Ch and ≤ 1% THD+N
2 Load Per Channel 200 Watts x 4Ch and ≤ 1% THD+N
4 Load Bridged 400 Watts x 2Ch and ≤ 1% THD+N
Dimensions: Height 2.375" (6cm)
Width 11.5" (29.2cm)
Length 16.75" (42.5cm)
Amplifier Fuse Rating (Amp/Type) (3) 30A / ATC
Battery Fuse Rating (Amp) External (Not Supplied) 90A
Signal-to-Noise Ratio >80dB A-weighted (reference: 0dB = 2Vrms)
Crossover (Front and Rear) Selectable HPF/LPF or Off (High Pass / Low Pass or All Pass)
Crossover Slope 12dB/octave Butterworth
Crossover Frequency (Multiplier X1) variable from 50Hz to 500Hz
Crossover Frequency (Multiplier X10) variable from 500Hz to 5KHz
Frequency Response 0.25Hz to 100kHz (-3dB, 1watt)
Rated Bandwidth 20Hz to 20kHz
Signal Voltage Adjustment Range (RCA Input) Variable from 0.15V to 8V
Protection Shorted output, DC offset,
thermal, power supply over-current
Input Impedance 20k ohms
These specifications are Amplifier Power Standard CEA-2006 Compliant
Specifications subject to change without notice
Excessive Engine Noise
Possible Cause
RCA cables too close to main power
cables.
Bad component in the signal chain
Poor ground connection at system
components
Poor ground connection at battery
Solution
Route all signal carrying wires (RCA, Speaker cables) away from
power and ground wires.
Bypass any and all electrical components between the source and
the amplifier(s). Connect source directly to input of amplifier. If
noise goes away the unit being bypassed is the cause of the noise.
Remove existing ground wires for all electrical components.
Reground wires to different locations. Verify that grounding
location is clean, shiny metal free of paint, rust etc
Add secondary ground cable from negative battery terminal to the
chassis metal or engine block of vehicle.