Lightning Audio FF250.1, FF150.2 manual Installation, CAUTION Use only one input

Installation

6.Prepare the REM turn-on wire for connection to the amplifier by stripping 1/2" of insulation from the wire end. Insert the bared wire into the REM terminal and tighten the set screw to secure the cable into place. Connect the other end of the REM wire to a switched 12 volt positive source. The switched voltage is usually taken from the source unit's accessory lead. If the source unit does not have this output available, the recommended solution is to wire a mechanical switch in line with a 12 volt source to activate the amplifier.

7.Securely mount the amplifier to the vehicle or amp rack. Be careful not to mount the amplifier on cardboard or plastic panels. Doing so may enable the screws to pull out from the panel due to road vibration or sudden vehicle stops.

8.Connect the source signal to the amplifier by plugging the RCA cables/high level inputs into the input jacks at the amplifier.

9.Connect the speakers. Strip the speaker wires 1/2" and insert into the speaker terminal and tighten the set screw to secure into place. Be sure to maintain proper speaker polarity. DO NOT chassis ground any of the speaker leads as unstable operation may result.

10.Perform a final check of the completed system wiring to ensure that all connections are accurate. Check all power and ground connections for frayed wires and loose connections which could cause problems.

NOTE: Follow the diagrams for proper signal polarity.

!CAUTION: These amplifiers are not recommended for impedance loads below 2Ω stereo and/or 4Ω bridged (mono).

CAUTION: Use only one input

!configuration. Using both the RCA and High Level inputs will cause undesirable operation.

Power Connection

+ 12V REM

FUSE

SPEAKER

GND

+

-

15A

15A

INPUT

JUICE

BOOST

X-OVER

GAIN

PROTECT

L

HI INPUT

0dB

12dB

40 250

MIN MAX

POWER

R

+ L -

+ R -

JUICE

INPUT

HI INPUT

PROTECT

X-OVER

FILTER

BOOST

GAIN

HIGH LOW

0dB

12dB

+ L - + R -

FLAT

50Hz

POWER

40 400

MIN MAX

FUSE

FUSE

SPEAKERS

+ 12V REM

GND

SPEAKERS

+ 12V REM

GND

+ L -

+

R -

+ L -

+

R -

+ BRIDGED

-

25A

+ BRIDGED

-

25A

*NOTE: When using High Level Inputs, if audible engine noise is present, connect the Black wire to chassis ground. If noise is still present, contact your local authorized dealer or Lightning Audio customer service.

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