NXi4002 - Receiver Hifonics - Free user manual and instructions

USER MANUAL NXi4002 Hifonics

Please read the user's manual carefully before the installation and the first operation of the amplifier.

SPECIFICATIONS

NXi4002

Output Power RMS

2x100W@4Ohms

2 x 180 W @ 2 Ohms

Output Power Max.

2x200W@4Ohms

2x360W@2Ohms

Loudspeaker impedance

2-8Ohms

Frequency Response

5-40 000 Hz (-3 dB)

Total Harmonic Distortion

< 0,05% (1 kHz)

Signal-to-Noise Ratio

90dB

Input Sensitivity

4-0,2V

Input Impedance

47 kOhms

Lowpass Filter

30-150Hz@12dB/Octave

Highpass Filter

10-1200 Hz @ 12 dB/Octave

Bass Boost

0-12dB

Operating Voltage

+12 V (12 - 16 V), negative ground

Fuse Rating

2 × 20 ~A

All Specifications are subject to change

WARRANTY

This product meets the current EU minimum warranty requirements, if purchased in countries of the EU. To ensure your warranty policy keeps your original receipt proofing the date of purchase. Any damage to the product as a result of misuse, abuse, accident, incorrect wiring, improper installation, alteration of date code or barcode labels, revolution, natural disaster, or any sneaky stuff because someone messed up, repair or alteration out side of our factory or authorized service centers and any thing else you have done that you should not have done is not covered. This warranty is limited to defective parts and specifically excludes any incidental or consequential damages connected therewith.

IMPORTANT NOTES PRIOR TO INSTALLATION

• This device is only suited for the operation in a vehicle.
• This device is only suited for a 12 volt system with negative ground.
• The radiated heat while operation requires sufficient air circulation at the place of installation. It is very important that the heatsink fins do not have contact with any metal parts or any surfaces which could impair air circulation. The amplifier may not be installed in small closed location or spaces without air circulation (e.g. spare wheel recess or below the vehicle carpeting). We recommend the installation in the vehicle's trunk. Ensure sufficient protection against vibrations, dust and dirt.
• Ensure that the input and output cables are sufficiently separated from the power supply cables. Otherwise interferences may occur.
• Ensure the accessibility of the fuse and the operating elements after installation.
• The reliability and performance of the amplifier depends on the quality of installation. Preferably consult an expert to install the system, particularly if you want to install several loudspeakers.

INTERCONNECTION

POWER SUPPLY AND TURN-ON-CONNECTION

ATTENTION: Before you start with the installation, disconnect the ground connection from the vehicle's battery in order to prevent short circuits.

The power wiring which is usually installed in on-board car networks is not sufficient for a power amplifier's demands. Make sure that the power wires to GND and to the +12V terminal has been sufficiently specified. A cable crosssection of at least 16mm^2 must be used to connect the battery to the amplifier's terminals.

First connect the GND terminal of the amplifier to an appropriate ground connection at the chassis. To ensure a good connection, residue dirt and dust from the connection point. A loose connection may cause malfunctions or interferences noise and distortion.

Then connect the +12V terminal of the amplifier with the battery by using an appropriate cable including an in-line fuse. This fuse should be located very close to the battery; for safety reasons not more than 30~cm away. Only insert the fuse when the installation, including the connection of the loudspeakers, has been accomplished.

Then connect the remote turn-on-wire from the headunit with the amplifier's REM terminal. A cable with a cross-section of 0.5mm^2 is adequate.

AUDIO SIGNAL CABLES

When installing the audio cables between the RCA outputs of the headunit and the RCA inputs of the amplifier, the audio and power supply cables should, if possible, not be routed along the same side of the vehicle. We recommend a separated installation, e.g. routing the power cable through the cable channel on the left side and the audio cables through the cable channel on the right side or vice versa. This prevents interferences due to crosstalk into the audio signal.

LOUDSPEAKER CONNECTIONS

• In 2-channel operation (i.e. one loudspeaker on each amplifier channel), the impedance must not be lower than 2 ohms for each speaker
• In bridging mode (two amplifier outputs combined) the impedance must not be lower than 4 ohms for the bridged output.
• Never connect loudspeaker cables with the ground of the chassis or the +12V supply voltage.

If the amplifier is operated with a too low impedance or incorrectly used, the entire sound system may be damaged. This means a warranty void in such cases.

SIGNAL OUTPUTS TO CONNECT ADDITIONAL AMPLIFIERS

The input signal on the LINE INPUT jacks (Fig. 1,8) will be routed in stereo to the output jacks LINE OUT (Fig. 1, 9). Hence, the LINE OUT jack allows the connection of an additional amplifier.

OPERATING ELEMENTS

INPUT SENSITIVITY

Turn the input level control (LEVEL INPUT, Fig. 1, 4) on the amplifier to the MIN. position. Turn then the volume control of the headunit to 80% - 90% of its maximum volume. Now turn slowly the input level control on the amplifier (LEVEL INPUT, Fig. 1, 4) in a clockwise direction until you hear some distortion, then turn back slightly until the distortion is not audible anymore.

VARIABLE HIGHPASS FILTER

If the amplifier is to be used for mid-range/tweeter loudspeakers, set the switch (X-OVER, Fig. 1,3) to "HP". Set the desired cross-over frequency on controller (HIGH PASS, Fig.1,7). Thus to that only the frequencies above the chosen cross-over frequency will be amplified. This effectively minimizes distortions and overloads at lower frequencies. A good point to start is at 125Hz .

For bigger loudspeakers (>20cm) set the switch (X-OVER, Fig. 1,3) to "FULL". In this configuration the highpass controller (HIGH PASS, Fig.1,7) is without function.

VARIABLE LOWPASS FILTER

If the amplifier is used to drive a subwoofer, set the switch (X-OVER, Fig. 1, 3) to "LP/BP". Set the desired cross-over frequency by using the controller (LOW PASS, Fig. 1, 6). Hence, only the frequencies below the chosen cross-over frequency will be amplified and the subwoofer plays more accurate and efficient.

In the "LP/BP" mode the highpass controller (HIGH PASS, Fig. 1,7) works as bandpass filter, which filters the lower frequencies out from the audio signal to avoid unwanted hum noises from the subwoofer. Set the desired crossover frequency by using the controller (HIGH PASS, Fig. 1, 7). Hence, only the frequencies above the chosen crossover frequency will be amplified and the subwoofer plays more precise and efficient.

VARIABLE BASS BOOST (only in LP Mode)

By using this controller (BASS BOOST, Fig.1, 5) you are able to increase the bass level. The range is between 0 dB and 12dB.

Note: Use the bass boost wisely. A too high bass boost could permanently damage the speakers.

PROTECTION CIRCUIT

The LED (POWRE, Fig. 1,1) lits up, if the amplifier is in operation.

The LED (PROTECT, Fig. 1, 1) lits up, when the amplifier is overheated, or a short circuit occurs resp. a too low impedance load is connected to the speaker outputs. If this happens, the internal built-in protection circuit shuts down the amplifier automatically. The amplifier should work again properly after you have solved the problems.

FIGURES (P. 28-30)

CONNECTIONS AND CONTROLLER (FIG. 1)

(1) Power/Protect-LEDs
(2) Remote jack for the included bass remote control
(3) Selector LP/BP (Lowpass/Bandpass) - HP (Highpass) - FULL
(4) Gain level controller
(5) Bass boost controller
(6) Lowpass filter controller
(7) Highpass controller (Bandpass controller in LP/BP mode)
(8) RCA audio signal inputs from the headunit
(9) RCA audio signal outputs to run additional amplifiers

POWER SUPPLY AND TURN ON CONNECTION (FIG. 2)

(1) GND terminal for the ground
(2) REMOTE terminal for the turn on connection
(3) +12 V terminal for the positive-connection of the battery
(4) Vehicle's battery
(5) In-Line Fuse (not included in the scope of delivery)
(6) Turn on wire from the headunit or the electrical antenna
(7) Amplifier fuses

2-CHANNEL OPERATION STEREO (FIG. 3)

If you want to run the amplifier with the 2 line output channels from the headunit to drive 2 loudspeakers in stereo, connect the following setup:

(1) To the headunit, line output left
(2) To the headunit, line output right
(3) Loudspeaker left (2 - 8 Ohms)
(4) Loudspeaker right (2 - 8 Ohms)

1-CHANNEL OPERATION MONO (FIG. 4)

If you want to run the amplifier with the 2 line output channels from the headunit to drive a subwoofer, connect the following setup:

(1) Remote control to adjust the bass level e.g. from the driver's seat
(2) To the headunit, line output left or subwoofer output
(3) To the headunit, line output right or subwoofer output
(4) Subwoofer (4 - 8 Ohms)

TROUBLESHOOTING

If you are having problems after installation follow the Troubleshooting procedures below.

Procedure 1:

Check Amplifier for proper connections.

Verify that POWER LED is on. If POWER LED is on skip to Step 3, if not continue.

1. Check external in-line fuse on battery positive cable. Replace if necessary.
2. Verify that ground connection is connected to clean metal on the vehicle's chassis. Repair/replace if necessary.
3. Verify there is 12 to 16 Volts present at the positive battery and remote turn-on cable. Verify quality connections for both cables at amplifier, stereo, and battery/fuseholder. Repair/replace if necessary.

Procedure 2:

PROTECT LED is on.

1. If the PROTECT light is on, this is a sign of a possible short in the speaker connections. Check for proper speaker connections and use a multimeter to check for possible shorts in the speaker wiring. Too low speaker impedance may also cause PROTECT to light. This can also be a sign of driving the amplifier at very high power levels without adequate airflow around the amplifier. Shut off the system and allow amplifier to cool down. Check that the vehicle charging system is maintaining proper voltage. If the previous items do not solve the problem, a fault may be in the amplifier.

Procedure 3:

Check Amplifier for audio output.

1. Verify good RCA input connections at stereo and amplifier. Check entire length of cables for kinks, splices, etc. Test RCA inputs for AC volts with stereo on. Repair/replace if necessary.

Procedure 4:

Check Amplifier for a popping noise while turning on.

1. Disconnect input signal to amplifier and turn amplifier on and off.
2. If the noise is eliminated, connect the REMOTE lead of amplifier to source unit with a delay turn-on module.

OR

1. Use a different 12 Volt source for REMOTE lead of amplifier (i.e. battery direct).
2. If the noise is eliminated, use a relay to isolate the amplifier from noisy turn-on output.

Procedure 5:

Check Amplifier if you experience excess Engine Noise.

1. Route all signal carrying wires (RCA, Speaker cables) away from power and ground wires.

OR

1. Bypass any and all electrical components between the headunit and the amplifier(s). Connect stereo directly to input of amplifier. If noise goes away the unit being bypassed is the cause of the noise.

OR

1. 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.

OR

1. Add secondary ground cable from negative battery terminal to the chassis metal or engine block of vehicle.

OR

1. Have alternator and battery load tested by your mechanic.Verify good working order of vehicle electrical system including distributor, spark plugs, spark plug wires, voltage regulator etc.

Dimensions (L x H x P)

250× 52× 250 / 280mm

Dimensioni (L x A x P)

© 2012 Audio Design GmbH, All Rights Reserved.