Fusionbrands fm-504 Control Descriptions, Subsonic Filter, Level, Front RCA Input, Rear RCA Input

Models: fm-504

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Control Descriptions

Control Descriptions

 

 

 

 

 

 

004 CONTROLS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4 CHANNEL • FULLY REGULTED 2 OHM STABLE • Bridgeable MOSFET Amplifier

 

 

FM-504

 

 

 

 

 

 

 

 

 

INPUT

INPUT

 

PWR

FRONT X-OVER

LP

HP

BASS BOOST

SUBSONIC

LEVEL

FRONT

REAR

OUTPUT

 

 

SELECTOR

 

 

 

 

 

 

 

 

 

 

PRT

OFF LP

HP

40HZ 160HZ

40HZ 600HZ

0DB +18DB

20HZ 55HZ

8V

0.3V

L

L

L

 

 

REAR X-OVER

LP

HP

BASS BOOST

SUBSONIC

LEVEL

 

 

 

 

 

SELECTOR

 

 

 

 

 

 

 

 

 

 

 

OFF LP

HP

40HZ 160HZ

40HZ 600HZ

0DB +18DB

20HZ 55HZ

8V

0.3V

R

R

R

 

1

2

 

3

4

5

6

 

7

8

9

10

6

Subsonic Filter:

 

This is a variable control filters out all Sub Bass Frequencies below the set point at 18dB/octave.

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Level:

 

This allows level adjustment of the input signal. Use this control to correctly match the head unit to the

 

amplifier. To set this control correctly, turn the amplifier level to MIN and the head unit to 3/4 volume, with

 

the BASS and TREBLE on zero , then slowly turn up this amplifier level control towards the MAX end of the

 

control. NOTE: If the sound becomes distorted, turn this control down.

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Front RCA Input:

 

Connect these RCA connectors to the front LOW LEVEL output connection from the head unit.

9

Rear RCA Input:

 

Connect these RCA connectors to the rear LOW LEVEL output connection from the head unit.

10

RCA Output:

005 CONTROLS

FMFE-504-504

GND

+12V

REM

 

 

 

 

 

FUSEFUSE

FUSEFUSE

11

12

13

14

 

BRIDGE MODE

MONO

L L

RR

FRONTFRONT

REARREAR

15

 

Use these RCA Output connectors to connect to a secondary amplifier. This output is a SUMMED OUTPUT con-

 

nection derived from the front RCA input and the rear RCA input connectors.

11

Ground Connection:

 

Connect directly to suitable ground point via a 4 gauge power cable. NOTE: This is to be the first wire to con-

 

nect when wiring up amplifiers. Damage could result of this is not done.

12

+12V Connection:

 

This must be connected to the battery positive (+) terminal via a 4 gauge power cable and with an inline fuse

 

or circuit breaker at the battery end. NOTE: This is to be the last wire to connect up during installation as

 

damage could result.

1Power And Status LEDs:

this shows if the amplifier has been correctly powered up and if any faults are present.

2Crossover Selector:

Set the appropriate mode of operation. The 3 positions available are OFF, LP and HP. See points 3 and 4 below.

3Low Pass:

Set the crossover switch 2 to LP when a subwoofer is connected. Ensure the crossover frequency is set at 100Hz or below, this feature is designed to filter all mid to high frequencies that only FULL RANGE speakers should produce. NOTE: Failure to do so could result in speaker damage.

4High Pass:

Set the crossover switch 2 to HP and turn this control to 65Hz or above when using speakers smaller than 6 x 6”, this feature is designed to filter all low bass frequencies that only SUBWOOFERS should produce. NOTE: Failure to do so could result in speaker damage.

5Bass Boost:

This is a variable control to increase the bass boost at 45Hz from 0 -+18dB of gain, adjust to suit.

13

Remote Connection:

 

This input is for turning the amplifier on and off. This requires a switched positive (+12V) to power ‘ON’ the

 

amplifier, this can be found on the rear of the head unit in the form of an electric antenna output, or a remote

 

on output. If not available you can wire to the ACC position on the key.

14

Fuses:

 

Please ensure the correct type of fuse is fitted, as specified in this manual. PLEASE NOTE: the FM-504 has 2x

 

25A fuses.

15

Speaker Output:

 

See 4/3/2 channel installation diagrams in this manual for correct speaker connection.

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Fusionbrands fm-504 Control Descriptions, Subsonic Filter, Level, Front RCA Input, Rear RCA Input, RCA Output, Low Pass