Bedienungsanleitung Rockford Fosgate R250-4 (Seite 7 von 20) (Englisch)

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Installation

Before installation, disconnect the battery neg-

ative (-) terminal to prevent damage to the unit,

ﬁre and/or possible injury.

Avoid running power wires near the low level

input cables, antenna, power leads, sensitive

equipment or harnesses. The power wires car-

ry substantial current and could induce noise

into the audio system.

1. Plan the wire routing. Keep RCA cables close together but isolated

from the ampliﬁer’s power cables and any high power auto accessories,

especially electric motors. This is done to prevent coupling the noise

from radiated electrical ﬁelds into the audio signal. When feeding

the wires through the ﬁrewall or any metal barrier, protect them with

plastic or rubber grommets to prevent short circuits. Leave the wires

long at this point to adjust for a precise ﬁt at a later time.

2. Prepare the RED wire (power cable) for attachment to the ampliﬁer by

stripping 3/8” of insulation from the end of the wire. Crimp the bared

wire into a fork or ring style connector and attach to the B+ terminal.

Tighten the screw to secure the cable in place.

NOTE: The B+ cable MUST be fused 18” or less from the vehicle’s battery.

Install the fuseholder under the hood and ensure connections are water

tight.

3. Trim the RED wire (power cable) within 18” of the battery and splice in

a inline fuse holder (not supplied). See Speciﬁcations for the rating of

the fuse to be used. DO NOT install the fuse at this time.

4. Strip 1/2” from the battery end of the power cable and crimp an

appropriate size ring terminal to the cable. Use the ring terminal to

connect to the battery positive terminal.

5. Prepare the BLACK wire (Ground cable) for attachment to the

ampliﬁer by stripping 3/8” of insulation from the end of the wire.

Crimp the bared wire into a fork or ring style connector and attach to

the GROUND terminal.Tighten the screw to secure the cable in place.

Prepare the chassis ground by scraping any paint from the metal

surface and thoroughly clean the area of all dirt and grease. Strip the

other end of the wire and attach a ring connector. Fasten the cable to

the chassis using a non-anodized screw and a star washer.

NOTE: Keep the length of the BLACK wire (Ground) as short as possible.

Always less than 30”.

6. Prepare the Remote turn-on wire for attachment to the ampliﬁer by

stripping 3/8” of insulation from the end of the wire. Crimp the bared

wire into a fork or ring style connector and attach to the REMOTE

terminal.Tighten the screw to secure the wire in place. Connect the

other end of the Remote wire to a switched 12 volt positive source.

The switched voltage is usually taken from the source unit’s remote

amp on 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 from source signal by plugging the RCA cables into the input

jacks at the ampliﬁer.

Always ensure power is off or disconnected at

the ampliﬁer before connecting RCA cables.

Failure to do so may cause damage to the am-

pliﬁer and/or connected components.

9. Connect the speakers. Strip the speaker wires 3/8”, crimp the bared

wire into a fork or ring style connectors and attach to the speaker

terminals.Tighten the 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.

Install inline fuse near battery connection.

NOTE: Follow the diagrams for proper signal polarity.

This ampliﬁer is not recommended for imped-

ance loads below 2-Ohms stereo and 4-Ohms

bridged.

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Rockford Fosgate R250-4 Seite 7

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