1. Introdução
This manual provides detailed instructions for the installation, operation, and maintenance of your Stetsom IR 400.1 BASS 2 Ohms Digital Sub AmpAmplificador. Leia este manual atentamente antes de usar o produto para garantir o funcionamento correto e a segurança.
The Stetsom IR 400.1 BASS is a compact, high-fidelity mono amplifier designed specifically for subwoofers, offering 400 Watts RMS at 2 Ohms. It features advanced technology for defined mids and bass, along with adjustable crossovers and bass boost controls.

Imagem 1.1: Frente view of the Stetsom IR 400.1 BASS Digital Sub Amplifier, showing the "Iron Line" branding, Stetsom logo, model number, and power/speaker terminals.
2. Informações de segurança
Observe sempre as seguintes precauções de segurança para evitar ferimentos ou danos ao equipamento. ampAmplificador e componentes conectados:
- Ensure the vehicle's battery is disconnected before beginning any installation.
- Instalar o amplifier in a dry, well-ventilated location, away from direct sunlight and heat sources.
- Utilize fios com a bitola adequada para as conexões de alimentação, aterramento e alto-falantes, conforme especificado neste manual.
- Não exponha o amplifier to moisture or liquids.
- Se o amplifier malfunctions or emits smoke, immediately disconnect power and consult a qualified technician.
- Esse amplifier is designed for 12V DC automotive systems only.
3. Recursos do Produto
The Stetsom IR 400.1 BASS ampO amplificador inclui os seguintes recursos principais:
- Potência de saída: 400 Watts RMS at 14.4V into 2 Ohms.
- Projeto monobloco Classe D: Dedicated for bass applications, stable at 2 Ohms.
- Controles de áudio:
- Crossover (HPF): Adjustable from 5Hz to 35Hz.
- Crossover (LPF): Adjustable from 35Hz to 250Hz.
- Bass Boost: Gain adjustable up to +15dB, frequency range 35Hz to 60Hz.
- Design compacto: New technology allows for a smaller footprint.
- Arrefecimento Eficiente: Powerful cooler for improved ventilation and extended use.
- Conectores robustos:
- Power/Ground: 6mm² (approximately 10 AWG).
- Remote: 0.75mm² (approximately 18 AWG).
- Speakers: 2.5mm² (approximately 14 AWG).
- Fuse: 30A.
4. Conteúdo da embalagem
Ao desembalar, verifique se os seguintes itens estão incluídos:
- Stetsom IR 400.1 BASS Digital Sub Ampmais vivo
- Manual do usuário (este documento)
Note: Additional accessories such as wiring kits, RCA cables, and subwoofers are sold separately.
5. Configuração e instalação
A instalação correta é crucial para o desempenho ideal e a segurança. Se tiver dúvidas sobre algum passo, consulte um instalador profissional de som automotivo.
5.1 Local de Montagem
Escolha um local de montagem que seja:
- Dry and free from moisture.
- Bem ventilado para permitir a dissipação do calor.
- Secure, preventing movement during vehicle operation.
- Acessível para fiação e ajustes.
5.2 Conexões de Fiação
Refer to the installation diagram below for correct wiring. Ensure all connections are secure and properly insulated.

Imagem 5.1: Topo view of the Stetsom IR 400.1 BASS amplifier, highlighting the POWER, REM (remote), GND (ground) terminals, the FUSE 25A slot, and SPEAKER output terminals.

Imagem 5.2: Traseira view of the Stetsom IR 400.1 BASS amplifier, displaying the Bass Boost, Crossover, Input Level controls, RCA inputs, High Input terminals, and an integrated wiring diagram.
- Power Connection (POWER): Connect a 6mm² (approx. 10 AWG) power cable from the vehicle's positive battery terminal to the amplifier's "POWER" terminal. Install a 30A fuse within 30cm (12 inches) of the battery.
- Conexão de aterramento (GND): Connect a 6mm² (approx. 10 AWG) ground cable from the amplifier's "GND" terminal to a clean, unpainted metal point on the vehicle's chassis. Ensure a solid electrical connection.
- Ativação remota (REM): Connect a 0.75mm² (approx. 18 AWG) remote wire from your head unit's remote output to the amplifier's "REM" terminal. This turns the ampLigar e desligar o amplificador com a unidade principal do seu aparelho.
- Speaker Connection (SPEAKERS): Connect your subwoofer(s) to the "SPEAKERS" terminals using 2.5mm² (approx. 14 AWG) speaker wire. Ensure the total impedance of the connected subwoofers is 2 Ohms or higher. Observe correct polarity (+ to + and - to -).
- Audio Input (INPUT):
- Entrada RCA: Connect RCA cables from your head unit's subwoofer output to the amplifier's "INPUT L" and "INPUT R" RCA jacks.
- Entrada alta: If your head unit does not have RCA outputs, use the high-level input. Connect the speaker outputs from your head unit to the "HIGH INPUT" terminals (+L/-L and +R/-R).
6. Instruções de operação
Uma vez que o amplifier is installed and wired correctly, you can adjust its settings for optimal sound performance.
6.1 Inicialização
Após todas as conexões estarem feitas, reconecte a bateria do veículo. Ligue o aparelho de som. amplifier should power on, indicated by an illuminated LED (if present).
6.2 Ajustando os controles de áudio
The Stetsom IR 400.1 BASS features several adjustable controls on its rear panel:
- INPUT LEVEL (MIN/MAX): Este controle corresponde ao amplifier's input sensitivity to the output level of your head unit. Start with the level at minimum, then slowly increase it until you hear distortion, then back off slightly.
- CROSSOVER (L.P.F. 35Hz ~ 250Hz): The Low Pass Filter (LPF) allows frequencies below the set point to pass through to the subwoofer. Adjust this to blend the subwoofer's output seamlessly with your main speakers. A common starting point is 80Hz-100Hz.
- CROSSOVER (H.P.F. 5Hz ~ 35Hz): The High Pass Filter (HPF) allows frequencies above the set point to pass. For subwoofers, this is typically used to filter out extremely low, inaudible frequencies that can waste amplifier power and potentially damage the subwoofer. Set it to the lowest useful frequency, often around 5Hz-10Hz.
- BASS BOOST (FREQ 35Hz ~ 60Hz, GAIN 0dB ~ +15dB): This control allows you to boost specific bass frequencies.
- FREQUENCIA: Seleciona a frequência central para o reforço de graves.
- GANHO: Adjusts the amount of boost applied to the selected frequency. Use sparingly to avoid distortion and potential damage to your subwoofer.
Recommendation: Make small adjustments and listen carefully to the sound. It is often best to set the gain and crossover points with test tones or familiar music to achieve the desired sound quality.
7. Manutenção
The Stetsom IR 400.1 BASS ampO amplificador requer manutenção mínima. Siga estas orientações para garantir sua longevidade:
- Mantenha o ampLimpe o amplificador, removendo poeira e detritos. Use um pano macio e seco para a limpeza.
- Garanta ventilação adequada ao redor do ampAmplificador. Não bloqueie as aletas ou aberturas de ventilação.
- Verifique periodicamente se todas as conexões da fiação estão bem apertadas e se há corrosão. Conexões soltas podem causar problemas de desempenho ou danos.
- If the fuse blows, replace it only with a fuse of the same type and rating (30A). Using a fuse with a higher rating can lead to severe damage or fire.
8. Solução De Problemas
Se você tiver problemas com seu amplifier, consult the following troubleshooting guide before seeking professional assistance:
| Problema | Possível causa | Solução |
|---|---|---|
| Sem energia / Amplifier não liga |
|
|
| Sem saída de som |
|
|
| Som distorcido |
|
|
| AmpSuperaquecimento do amplificador |
|
|
9. Especificações
| Recurso | Especificação |
|---|---|
| Modelo | IR400.1_BASS |
| RMS Power (14.4V) | 400 W RMS a 2 Ohms |
| Canais | 1 (Monobloco) |
| Impedância mínima | 2 Ohms |
| Filtro passa-baixo (LPF) | 35Hz ~ 250Hz |
| Filtro passa-altas (HPF) | 5Hz ~ 35Hz |
| Ganho de reforço de graves | 0dB~+15dB |
| Frequência de reforço de graves | 35Hz ~ 60Hz |
| Vol de entradatage | 9V ~ 15V CC |
| Avaliação de fuzível | 30A |
| Power/Ground Wire Gauge | 6mm² (approx. 10 AWG) |
| Remote Wire Gauge | 0.75mm² (approx. 18 AWG) |
| Calibre do fio do alto-falante | 2.5mm² (approx. 14 AWG) |
| Dimensões do produto (C x L x A) | 5 x 3.9 x 2 polegadas |
| Peso | 1.21 libras |
10. Garantia e Suporte
Stetsom products are designed and manufactured to the highest quality standards. For warranty information and technical support, please refer to the warranty card included with your product or visit the official Stetsom website.
For further assistance, you may contact Stetsom customer service through their official channels. Keep your purchase receipt as proof of purchase for warranty claims.
Recursos on-line: