STETSOM HQ 400.4 Multichannel Car Audio Digital Amplifier User Manual

STETSOM HQ 400.4 Multichannel Car Audio Digital Amplifier

Product Specifications

• Model: 400.4
• Channels: 4 independent channels
• Input Connections: RCA double connections, High input connections
• Crossover Range: 50Hz to 2.3KHz
• Speaker Output: Amplified audio outputs
• Power Supply: Negative connector, Connector for remote activation

Audio Input
Ensure to use quality shielded RCA cables to connect the RCA input connections to radio/player outputs. For high-input connections, verify the signals of the amplified output of the radio/player before making connections.

Using REMOTE IN (HIGH INPUT):
If your radio has a remote (REM) output, connect it directly to the REM IN (green wire) of the HIGH INPUT output for automatic amplifier activation.

Audio Controls
LEVEL: Adjust the signal level for speakers. Use this control for volume equalization.
VARIABLE CROSSOVER: Set the crossover cut-off range from 50Hz to 2.3KHz.
CROSSOVER SWITCHES: Choose between HPF (cuts off low frequencies), FLAT (no filters), and LPF (cuts off high frequencies).

Speakers Output
Connect speakers to the amplified audio outputs. Verify speaker polarity and minimum impedance supported by the amplifier before installation.

Power Supply
Connect the negative connector to the negative battery terminal using a minimum 9 AWG cable. Use a minimum 18 AWG cable to connect the REMOTE activation connector to the REMOTE output of the radio/player.

Frequently Asked Questions (FAQ)

Q: Can I use both RCA input and HIGH INPUT connections simultaneously?
A: No, using both types of connections at the same time can cause unwanted noise and amplifier problems.

Introduction

Thank you so much for choosing a Stetsom product! The chosen amplifier has been developed with the most advanced technology for who are looking for high performance audio systems with one or more speakers.

Before installing

Please read this manual carefully.

• All product connections must be made with the product turned OFF.
• A fuse must be installed between the amplifier and the battery is required to protect against overcharging. The fuse need be installed as close to the battery as possible. Check the proper fuse for the amplifier according to its consumption.
• Use gauges recommended in this manual to avoid the overheating of the cables to obtain maximum power.
• Keep the cables as short as possible to increase sound fidelity and avoid potential power losses.
• Route the installation cables as far away as possible from the original vehicle wiring as it may cause interference and noise in your audio system.
• Perform the installation in a firm, ventilated and dry place.
• Installation must be done by a qualified professional.

If you have questions , contact the store where the purchase or installation was made. For more information please contact our Customer Service:
+55 18 2104 9412.

Audio input

1. RCA INPUT CONNECTIONS: RCA double connections with 4 independent channels (CH1 and CH2 / CH3 and CH4) identified on the product. Connect to radio/player outputs via quality shielded RCA cables to prevent unwanted noise.
2. HIGH INPUT CONNECTIONS: This connection can be used when the radio/player does not have RCA audio outputs. Each connector has 2 independent channels (CH1 and CH2 / CH3 and CH4) identified in the amplifier. Check the signals of the amplified output of the radio/player before making connections.

Using the RCA input and HIGH INPUT connections at the same time can cause unwanted noise and amplifier problems.

Using REMOTE IN (HIGH INPUT)

The amplifier’s REMOTE IN feature can be turned on in three different ways, depending on your vehicle’s system.

• CAN PROTOCOL: This system has timings that can cause PUFF in the audio system. To minimize this happening in vehicles with this system, we recommend installing the REMOTE IN (green) wire to the ACC signal.
  

• AUTO TURN ON: Connect the REMOTE IN (green) wire to any of your radio’s audio outputs. The amplifier will detect the presence of audio and turn on automatically.
  

• MANUAL OPERATION: Use a switch or button between the REMOTE IN connection (green wire) and the positive 12V battery supply for manual operation of the amplifier.

If your radio has a remote (REM) output, connect it directly to the REM IN (green wire) of the HIGH INPUT output for automatic amplifier activation.

Audio controls

LEVEL:
Allows you to adjust the signal level that will be sent to the speakers. Use this control to equalize the music volume played through the speakers.

VARIABLE CROSSOVER

Allows adjustment of the crossover cut-off range, variable from 50Hz to 2.3KHz.
These controls operate in conjunction with the crossover switches, allowing cutoff adjustment on the selected switch (H.P.F. or L.P.F.).

CROSSOVER SWITCHES:

The amplifier has two selection switches with frequency cut-off function. The cut-off adjustment should be made through the variable crossover controls. Each switch acts on two channels at the same time (CH1 and CH2 / CH3 and CH4).

• HPF: This filter cuts off frequencies lower than the one selected in the crossover control (50Hz to 2.3KHz).
• FLAT: It does not apply any filters, allowing reproduction of all frequencies supported by the amplifier.
• LPF: This filter cuts off frequencies higher than the one selected in the crossover control (50Hz to 2.3KHz). The filter has a gain of +12dB at the selected frequencies.

Speakers output

• SPEAKERS CONNECTOR Amplified audio outputs for speaker connection. Check speaker polarity and minimum impedance supported by the amplifier before installation.

Power supply

NEGATIVE CONNECTOR Connect to the negative battery terminal via a minimum 9 AWG cable.

• CONNECTOR FOR REMOTE ACTIVATION (REM) : Allows automatic activation of the amplifier when turning on the radio/player. Connect to the REMOTE output of the radio/player via a minimum 18 AWG cable.
• POSITIVE CONNECTOR : Connect to the battery’s positive terminal via a cable of at least 9 AWG with a fuse (25A) as close to the battery as possible.

Installation

Specification of the cables and fuse for proper installation:

• Power connectors (positive/negative) …………………………………………………………..9 AWG
• Remote connecto (REM) ………………………………………………………………………………..18 AWG
• Output signal connectors (speakers) ……………………………………………………………13 AWG
• Fuse ………………………………………………………………………………………………………………..25A
• Installation must be done only by qualified professionals with the product turned OFF.
• The use of fuse or circuit breaker is mandatory to protect the system from short circuit and overload. Install them as close to the battery as possible.

HIGH INPUT diagram

Use the RCA and HIGH INPUT connections at the same time can cause unwanted noise and amplifier problems.

Speakers Installation

Troubleshooting

AMPLIFIER DOESN’T TURN ON

• Verify that the cables are connected correctly. Make sure all connections have electrical and mechanical contact.
• Fuses or circuit breakers may be defective or blown. Check the condition of the circuit breakers and if it is compatible with the equipment consumption.
• Verify that the battery charge is sufficient for the operation of the product

NO SOUND

• The cables of the speakers or connections may not be connected correctly or are defective.
• Verify that the LEVEL control is not at a minimum.

PROT LED FLASHING

• Verify that the product vents are not blocked or the product is overheated.
• Speakers or cables shorted, check speakers, cables and connections.

SOUND DISTORTIONS

• Speakers may be overloaded or defective, turn down and re-adjust the LEVEL. This setting can be adjusted as follows:
  • On the radio/player, put any musical signal and set the volume to 80% of maximum (if the maximum volume of the radio/player is 45 (100%), set it to 36 (80%).
  • On the amplifier, with the LEVEL control at minimum, gradually increase it until you hear distortion in the speakers. Slowly return the LEVEL until you notice that there is no more distortion in the audio.

LACK OF BASS

• Cables of the speakers may be reversed (out-of-phase speakers).

NOISE AND FAILURE IN SOUND

• Verify that the installation is not close to the original vehicle wiring as they may cause interference and noise in the audio signal.
• Make a separate power connection to the sound system. Use a fuse/ circuit breaker as close to the battery as possible for protection.
• Make a good grounding of the amplifier. To do this, remove the paint from the vehicle chassis at the desired point. Screw the wire using a ground terminal. To protect from oxidation, isolate with paint.
• Do not loop the ground. Avoid using multiple grounds. If possible, use a star connection, in which all the grounds run from a single point.

Any updates made in this manual will be available for costormers to consult without any charge on the brand’s site.
It is recommended that the updated manual be consulted whenever needed.
Images contained in this manual are merely illustrative and may differ from the actual product.

Techinical specifications

The data measured are based on STETSOM laboratory equipment. Test reference in frequency from 60hz to 1Khz with THD + N at ≤1% in impedances as indicated in each measurement. The electronic components and the manufacturing process may present manufacturing variations, thus leading to a variation in the measurements made.

Warranty Term

STETSON, through its network of Authorized Technical Assistance Providers, guarantees technical assistance to the purchaser of their products. The repairs of any defects duly established as being of the manufacturer will be done without cost for replacement components or parts and repair labor. The repairs will be done by the Authorized Technical Assistance Provider specially designated by STETSOM.

CONSULT THE LIST OF AUTHORIZED TECHNICAL ASSISTANCE PROVIDERS ON OUR WEBSITE: www.stetsom.com.br/en/assistencias-tecnica
If you do not locate technical assistance in your city, please contact us at: BR +55 18 2104-9412

WARRANTY CONDITIONS
Our warranty is 1 (one) year against manufacturing defects. Its validity starts on the date of the Sale to the FINAL Consumer.
To make use of the benefits of this warranty, you must present one of the following documents: the Final Consumer’s SALE NOTE or this completed CERTIFICATE.

CASES THAT VOID THE WARRANTY:

1.  year after the issuance of the invoice of sale to the consumer or 1 year of completing certificate of warranty (dated and stamped by the retailer or installer) or 1 year from date of manufacture.
2. Violation of seals, alteration or removal of the product’s serial or lot number.
3. If the product suffers misuse, careless accidents involving: Water, Fire or Fall, or is installed in conditions contrary to the guidelines contained in the installation manual that accompanies the product.
4. Damages and changes in the circuit or adaptation of non-original parts.
5. If you use installation techniques contrary to those given in the manual.

QUESTIONS AND ADVICE

• STETSOM offers Customer Services to answer questions and give advice about their products and services. Please contact us through the channels:
• Phone: BR +55 18 2104-9412
• E-mail: suporte@stetsom.com.br — Site: www.stetsom.com

Statement of conformity

EUROPE – Declaration of Conformity < EU-DoC >
Hereby, STETSOM INDUSTRIA ELETRÔNICA LTDA declares that this equipment type is in-compliance with Directive 2014/30/EU. The full text of the EU declaration of conformity is available at the following internet address:

MODEL : HQ400.4 (2Ω) Voltage Supply: 9V – 15.5V DC Current Range: 0.52A – 34A MADE IN BRAZIL

wwwwww.s.stteetsom.ctsom.com.br/om.br/certicertificficaatitionons/s /bbrraavvo- o_hfuq400.4_2ohll_2000_1ohms_eum_eu-d-doc.poc.pddff

Waste Electrical and Electronic Equipment (WEEE)
The European Union (EU) WEEE Directive (2002/96/EC) places an obligation on producers (manufacturers, distributors and/or retailers) to take back electronic products at the end of their useful life. The WEEE Directive covers most HME products being sold into the EU as of August 13, 2005. Manufacturers, distributors and retailers are obliged to finance the costs of recovery from municipal collection points, reuse, and recycling of specified percentages per the WEEE requirements.

Instructions for Disposal of WEEE by Users in the European Union
The symbol shown below is on the product or on its packaging which indicates that this product was put on the market after August 13, 2005 and must not be disposed of with other waste. Instead, it is the user’s responsibility to dispose of the user’s waste equipment by handing it over to a designated collection point for the recycling of WEEE. The separate collection and recycling of waste equipment at the time of disposal will
help to conserve natural resources and ensure that it is recycled in a manner that protects human health and the environment. For more information about where you can drop off your waste equipment for recycling, please contact your local authority, your household waste disposal service or the seller from whom you purchased the product.

Guarantee certificate

• Serie:
• Date of purchase:
• Month / Year of manufacture:
• Reseller / Stamp:

STETSOM INDUSTRIA ELETRÔNICA LTDA. – CNPJ: 61.974.911/0001-04
RUA MARIANO ARENALES BENITO, 645 – DISTRITO INDUSTRIAL – CEP 19043-130 PRESIDENTE PRUDENTE – SP

• STETSOMBRASIL
• GRUPOSTETSOM
• STETSOMBRASIL

www.STETSOM.com.br

References

• Stetsom - Stetsom
• Stetsom - Stetsom
• Assistências TécnicaTechnical AssistanceAsistencias Técnica - Stetsom
• Assistências TécnicaTechnical AssistanceAsistencias Técnica - Stetsom
• Assistências TécnicaTechnical AssistanceAsistencias Técnica - Stetsom

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