1. Introduktion
This manual provides detailed instructions for the installation, operation, and maintenance of your Stetsom IR 400.1 BASS 2 Ohms Digital Sub Amplifier. Please read this manual thoroughly before using the product to ensure proper function and safety.
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.

Billede 1.1: Forside 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. Sikkerhedsoplysninger
Overhold altid følgende sikkerhedsforanstaltninger for at forhindre personskade eller beskadigelse af amplifier and connected components:
- Ensure the vehicle's battery is disconnected before beginning any installation.
- Installer amplifier in a dry, well-ventilated location, away from direct sunlight and heat sources.
- Brug passende ledningsføring til strøm-, jord- og højttalertilslutninger som angivet i denne manual.
- Udsæt ikke amplifier to moisture or liquids.
- Hvis amplifier malfunctions or emits smoke, immediately disconnect power and consult a qualified technician.
- Denne amplifier is designed for 12V DC automotive systems only.
3. Produktfunktioner
The Stetsom IR 400.1 BASS amplifier includes the following key features:
- Strømudgang: 400 Watts RMS at 14.4V into 2 Ohms.
- Class D Monoblock Design: Dedicated for bass applications, stable at 2 Ohms.
- Lydkontrol:
- 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.
- Kompakt design: New technology allows for a smaller footprint.
- Effektiv køling: Powerful cooler for improved ventilation and extended use.
- Robust Connectors:
- Power/Ground: 6mm² (approximately 10 AWG).
- Remote: 0.75mm² (approximately 18 AWG).
- Speakers: 2.5mm² (approximately 14 AWG).
- Fuse: 30A.
4. Pakkens indhold
Ved udpakning skal du kontrollere, at følgende dele er inkluderet:
- Stetsom IR 400.1 BASS Digital Sub Amplivligere
- Brugervejledning (dette dokument)
Note: Additional accessories such as wiring kits, RCA cables, and subwoofers are sold separately.
5. Opsætning og installation
Korrekt installation er afgørende for optimal ydeevne og sikkerhed. Hvis du er usikker på nogle trin, skal du kontakte en professionel installatør af bilstereo.
5.1 Monteringssted
Vælg et monteringssted, der er:
- Tør og fri for fugt.
- Godt ventileret for at muliggøre varmeafledning.
- Secure, preventing movement during vehicle operation.
- Tilgængelig for ledningsføring og justeringer.
5.2 Ledningsforbindelser
Refer to the installation diagram below for correct wiring. Ensure all connections are secure and properly insulated.

Billede 5.1: Top 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.

Billede 5.2: Bagside 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.
- Jordforbindelse (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.
- Fjerntænding (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 amptænd og sluk for støjrelæet med din hovedenhed.
- 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):
- RCA-indgang: Connect RCA cables from your head unit's subwoofer output to the amplifier's "INPUT L" and "INPUT R" RCA jacks.
- Høj input: 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. Betjeningsvejledning
Når amplifier is installed and wired correctly, you can adjust its settings for optimal sound performance.
6.1 Indledende opstart
Når alle tilslutninger er foretaget, skal du tilslutte køretøjets batteri igen. Tænd din hovedenhed. amplifier should power on, indicated by an illuminated LED (if present).
6.2 Adjusting Audio Controls
The Stetsom IR 400.1 BASS features several adjustable controls on its rear panel:
- INDGANGSNIVEAU (MIN/MAX): Denne kontrol passer til 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.
- FREKVENS: Selects the center frequency for the bass boost.
- GEVINST: 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. Vedligeholdelse
The Stetsom IR 400.1 BASS ampLifier kræver minimal vedligeholdelse. Følg disse retningslinjer for at sikre dens levetid:
- Behold ampFjerneren er ren og fri for støv og snavs. Brug en blød, tør klud til rengøring.
- Sørg for tilstrækkelig ventilation omkring amplifier. Do not block cooling fins or vents.
- Periodically check all wiring connections for tightness and corrosion. Loose connections can cause performance issues or damage.
- 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. Fejlfinding
Hvis du oplever problemer med din amplifier, consult the following troubleshooting guide before seeking professional assistance:
| Problem | Mulig årsag | Løsning |
|---|---|---|
| Ingen strøm / Ampkøleren tænder ikke |
|
|
| Ingen lydudgang |
|
|
| Forvrænget lyd |
|
|
| AmpOverophedning af væske |
|
|
9. Specifikationer
| Feature | Specifikation |
|---|---|
| Model | IR400.1_BASS |
| RMS Power (14.4V) | 400W RMS @ 2 Ohm |
| Kanaler | 1 (Monoblok) |
| Minimum impedans | 2 Ohm |
| Lavpasfilter (LPF) | 35Hz ~ 250Hz |
| Højpasfilter (HPF) | 5Hz ~ 35Hz |
| Bas Boost Gain | 0dB ~ +15dB |
| Bas Boost Frequency | 35Hz ~ 60Hz |
| Input bindtage | 9V ~ 15V DC |
| Sikringsvurdering | 30A |
| Power/Ground Wire Gauge | 6mm² (approx. 10 AWG) |
| Remote Wire Gauge | 0.75mm² (approx. 18 AWG) |
| Højttaler ledningsmåler | 2.5mm² (approx. 14 AWG) |
| Produktmål (L x B x H) | 5 x 3.9 x 2 tommer |
| Vægt | 1.21 pund |
10. Garanti og support
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 webwebsted.
For further assistance, you may contact Stetsom customer service through their official channels. Keep your purchase receipt as proof of purchase for warranty claims.
Online ressourcer:





