RetroSound SUB-8100 Owner's Manual download pdf (Page 4)

INSTRUCTION SHEET

Part Number

Toll Free: 800.500.1500 • Worldwide: 217.540.4200 • www.mamotorworks.com • mail@mamotorworks.com

119-202

RetroSound

SUB-8100 Active Bass Subwoofer

(cont.)

Page 4

Problem Possible Cause Action to Solve Problem

Powered subwoofer will

not turn on

(no Power on LED indicator)

12 Volt Batt + wire not connected

or incorrect voltage/remote wire not

connected or incorrect voltage

Check all connections for proper voltage

with a volt meter. Voltage range:

12-15 volts.

Ground wire not connected Check ground connection.

Fuse on Batt + is blown Replace blown fuse.

No sound heard from unit but

LED power indicator is on

Volume turned all the way down Increase head unit volume/check

volume level on head unit.

Gain control on sub amp is

turned down

Increase gain control on end panel of

sub amp.

Input signal not connected Check low level inputs for proper

connection.

Unit blows fuses Incorrect fuse rating Use fuses with correct 10 amp rating.

Batt + wire is touching chassis ground Check for pinched or shorted wire.

On-board subwoofer defective Check/replace subwoofer.

Not +12 Volts/car battery not connected Make sure the vehicle is + 12 volts and

that the car battery is correctly

connected to the vehicle.

Remote lead shorting Check the Remote lead to make sure it

is not shorting out the amp.

Engine noise Bad ground connection Make sure the Sub-8100 unit is

grounded to clean bare metal of the

vehicle.

Signal ground loop or RFI interference Re-route RCA cables from existing high

current wiring.

Distorted audio output Incorrect input signal type

or input level is too high

Check connections and reduce/adjust

input level.

Poor bass response Adjust phase control.

Check polarity of speaker wires if using

high level input.

Low audio Output Incorrect input signal type or input level

too low

Check connections and increase/adjust

input level.

Weak bass response Low frequency output is out of phase Adjust phase control.

Check crossover adjustment.

Troubleshooting guide

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RetroSound SUB-8100 Owner's Manual Page 4

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