STETSOM BRAVO BASS 3K Digital Amplifier User Manual

: June 10, 2024
: STETSOM

Table of Contents

Introduction
Before installing
Input, output and audio controls
LED indicators
Instalation
Troubleshooting
Technical specifications
Warranty Term
Guarantee certificate
References
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STETSOM BRAVO BASS 3K Digital Amplifier User Manual

Introduction

Thank you so much for choosing a Stetsom product! This amplifier was developed with cutting-edge technology for those who want high quality sound from audio systems with one or more speakers or even an audio wall system.

Before installing

Please read this manual carefully.

All 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 overcurrent. The fuse needs to be installed as close to the battery as possible. Choose an appropriate fuse for the amplifier based on its consumption.
Use the wire recommended in this manual to keep cables from overheating cables and 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 to prevent interference and noise in your audio system.
Perform the installation on a firm surface in a ventilated and dry place.
Installation should only be done by a qualified professional.

Input, output and audio controls

Instruction

RCA JACK INPUT: Input of the signal to be amplified. Connect to the radio/ player using high quality shielded RCA cables to prevent unwanted noise.
Level control for the signal at the amplifier’s input.
CROSSOVER:
- SUBSONIC FILTER: This variable control allows you to select the initial
  frequency from 8Hz to 40Hz that will be reproduced by the amplifier.
- LOW PASS FILTER (L.P.F.): This variable control allows you to select the final
  frequency from 30Hz to 250Hz that will be reproduced by the amplifier.
BASS BOOST:
▪ BASS: Variable control for bass boost from 0dB to +10dB.
▪ FREQ: Variable control for BASS boost frequency from 30Hz to 70Hz.
FLAT KEY: This switch allows you to turn the FLAT mode on or off. Settings
made on the CROSSOVER and BOOST controls will be turned off when using this mode.
OUTPUT CONNECTOR (SPEAKERS): MONO output of amplified signal for speakers connection. Check the minimum impedance and polarities before performing the installation.
COOLER: It cools the amplifier. Install in a cool place being careful to not obstruct the air vents.
POSITIVE POWER SUPPLY CONNECTOR: Connect to the positive batter
terminal of the battery using a minimum 4 AWG cable with a fuse/circuit breaker (150A) installed as close to the battery as possible.
REMOTE CONNECTOR (REM): Allows automatic activation of the amplifier when turning on the radio/player. Connect to the remote output of the radio/player using a cable a minimum of 18 AWG.
NEGATIVE POWER SUPPLY CONNECTOR: Connect to the negative terminal of the battery using a cable with a minimum of 4 AWG.

LED indicators

LED Indicators

POWER (blue LED): Indicates that the amplifier is ON when it is lit up.
PROT (top red LED): Indicates that the amplifier has found faults in its functioning and entered protection mode, forcing it to shut down. Use the protection table below to identify the possible fault and turn the amplifier on again.
CLIP (lower red LED): Indicates signal saturation at the amplifier output.

Smart protection system
When the protection system finds a problem, the amplifier will shut down and the PROT LED will blink. For each kind of fault, the LED will blink a certain number of times, an indication of the cause, as shown in the table below:

Problem: Short circuit or output overload.
Solution: Check that the speaker cables are well insulated and that the impedance at the output does not exceed that supported by the amplifier.

Problem: Excessive temperature. When the amplifier reaches approximately 194ºF, the audio is interrupted, and the fans run at full speed to accelerate the process of cooling the internal components.
Solution: Check if the amplifier is in a ventilated place or if the fans are not obstructed. Keep the amp on for a few minutes, so the fans can help with the cooling process.

Problem: Supply voltage less than 9V.
Solution: Check battery voltage or power supply.

Problem: Supply voltage higher than 17V.
Solution: Check battery voltage or power supply.

Instalation

Specification of the cables for proper installation:

Power connectors (positive/negative): 4 AWG
Remote connector: 18 AWG
Output signal connectors (speakers): 8 AWG
Fuses or circuit breakers: 150A

The use of a fuse or circuit breaker is mandatory to protect the system from short
circuits and overload. Install them as close to the battery as possible.

Installation should only be done by qualified professionals with the product turned OFF.

Connection

Troubleshooting

AMPLIFIER DOES NOT 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 make sure they are compatible with the equipment consumption.
Make sure that the battery is charged sufficiently for the product to operate.

NO SOUND:

The cables to the speakers or RCA plugs may not be connected incorrectly or defective.
Make sure that the LEVEL control is not at a minimum.

PROT LED FLASHING:

Make sure that the product’s air vents are not blocked and that the product is not overheating.
Speakers or cables are shorted. Check speakers, cables and connections.

SOUND DISTORTIONS:

The speakers may be overloaded or defective, lower the level and then readjust the level. This setting can be adjusted as follows:
a) On the radio/player, play any musical signal and set the volume to 80% of the maximum (if the maximum volume of the radio /player is 45 (100%), set to 36 (80%).
b) On the amplifier, begin with the LEVEL control at minimum, increase gradually until the LED CLIP starts to flash. Slowly decrease the LEVEL until the led goes out completely.

WEAK OF BASS:

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

NOISE AND FAILURE IN SOUND:

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

The measurements given above were determined using equipment in the stetsom laboratory. AUDIO PRECISION APX515 audio analyzer + AUDIO PRECISION AUX-0025 passive filter: reference test at 60hz frequency with THD+N at ≤1%. Amplifier dyno ad-1 smd: reference test at 40hz frequency with THD+N at ≤1%. The electronic components and the manufacturing process can vary slightly and cause small variations in the measurements.

Technical specifications

Minimum output impedance: 1 OHM
Number of channels : 1
Power output @ 14.4V: 3000W RMS @ 1 Ohm 1800W RMS @ 2 Ohms
Input sensitivity: 200mV
Signal to noise ratio: >90dB
Frequency response @ 1 Ohm (-3dB):FLAT OFF: 8Hz ~ 250Hz FLAT ON: 8Hz ~ 600Hz
Low pass filter (crossover): 30Hz ~ 250Hz
Subsonic filter (crossover): 8Hz ~ 40Hz
Bass Boost: Freq: 30Hz ~ 70Hz Boost: 0dB ~ +10dB
Input Impedance: 5K Ohms
Supply Voltage: 9V ~ 17V DC
Musical Consumption: 132A
Dimensions (H x W x L): 3.14” x 9.11” x 9.29”
Weight 6.3lb

$Frequency $Hz$$

Warranty Term

STETSOM, 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 claim the benefits of this warranty, you must present one of the following documents: the Final Consumer’s SALE NOTE or this completed CERTIFICATE.

SITUATIONS THAT VOID THE WARRANTY:

year after the issuance of the invoice of sale to the consumer or 1 year after the certificate of warranty is filled out (dated and stamped by the retailer or installer) or 1 year from date of manufacture.
Violation of seals, alteration or removal of the product’s serial or lot number.
If the product suffers misuse or 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.
Damages and changes in the circuit or adaptation of non-original parts.
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

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.

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: