1. Nhanganyaya
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.

Mufananidzo 1.1: Mberi 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. Safety Information
Nguva dzose cherechedza zvinotevera kuchengetedzwa kwekuchengetedza kudzivirira kukuvara kana kukuvara kune amplifier and connected components:
- Ensure the vehicle's battery is disconnected before beginning any installation.
- Install the amplifier in a dry, well-ventilated location, away from direct sunlight and heat sources.
- Shandisa waya dzegeji dzakakodzera pakubatanidza magetsi, pasi, uye sipika sezvakatsanangurwa mubhuku rino.
- Usafumure amplifier to moisture or liquids.
- Kana iyo amplifier malfunctions or emits smoke, immediately disconnect power and consult a qualified technician.
- Izvi amplifier is designed for 12V DC automotive systems only.
3. Zvigadzirwa zveChigadzirwa
The Stetsom IR 400.1 BASS amplifier includes the following key features:
- Simba rinobuda: 400 Watts RMS at 14.4V into 2 Ohms.
- Class D Monoblock Design: Dedicated for bass applications, stable at 2 Ohms.
- Zvidzoreso zvekuteerera:
- 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.
- Compact Design: New technology allows for a smaller footprint.
- Kutonhodza Kunoshanda: Powerful cooler for improved ventilation and extended use.
- Zvinobatanidza Zvakasimba:
- Power/Ground: 6mm² (approximately 10 AWG).
- Remote: 0.75mm² (approximately 18 AWG).
- Speakers: 2.5mm² (approximately 14 AWG).
- Fuse: 30A.
4. Package Zviri mukati
Pakuburitsa zvinhu, iva nechokwadi chekuti zvinhu zvinotevera zvabatanidzwa:
- Stetsom IR 400.1 BASS Digital Sub Amplifier
- Mushandisi Chinyorwa (gwaro iri)
Note: Additional accessories such as wiring kits, RCA cables, and subwoofers are sold separately.
5. Setup uye Kuiswa
Proper installation is crucial for optimal performance and safety. If you are unsure about any steps, consult a professional car audio installer.
5.1 Nzvimbo Yekumusoro
Sarudza nzvimbo yekuisira:
- Dry and free from moisture.
- Iine mhepo inofefetera zvakanaka kuti ikwanise kudzima kupisa.
- Secure, preventing movement during vehicle operation.
- Inowanikwa nyore nyore pakubatanidza waya uye kugadzirisa.
5.2 Wiring Connections
Refer to the installation diagram below for correct wiring. Ensure all connections are secure and properly insulated.

Mufananidzo 5.1: Pamusoro 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.

Mufananidzo 5.2: Kumashure 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.
- Ground Connection (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.
- Kubatidza kure kure (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 amplifier on and off nemusoro wako unit.
- 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 Input: Batanidza tambo dzeRCA kubva pa subwoofer yemusoro weyuniti yako kuenda ku amplifier's "INPUT L" and "INPUT R" RCA jacks.
- Yakanyanya Kupinza: 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. Operating Instructions
Kamwe iyo amplifier is installed and wired correctly, you can adjust its settings for optimal sound performance.
6.1 Yekutanga Simba-Kukwira
After all connections are made, reconnect the vehicle's battery. Turn on your head unit. The amplifier should power on, indicated by an illuminated LED (if present).
6.2 Kugadzirisa Kudzora Manzwi
The Stetsom IR 400.1 BASS features several adjustable controls on its rear panel:
- INPUT LEVEL (MIN/MAX): Kudzora uku kunoenderana ne 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.
- FREQ: Selects the center frequency for the bass boost.
- WANA: 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. Kuchengeta
The Stetsom IR 400.1 BASS amplifier haidi kugadziriswa zvakanyanya. Tevedzera nhungamiro idzi kuti uve nechokwadi chekuti inogara kwenguva refu:
- Keep the amplifier inochenesa uye isina guruva kana marara. Shandisa jira rakapfava, rakaoma pakuchenesa.
- Ita shuwa kuti kune ventilation yakakwana yakatenderedza 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. Kugadzirisa matambudziko
Kana iwe uine dambudziko nezera rako amplifier, tarisa gwara rinotevera rekugadzirisa matambudziko usati watsvaga rubatsiro rwenyanzvi:
| Dambudziko | Zvinogona Kukonzera | Solution |
|---|---|---|
| Hapana Simba / Amplifier haibatike |
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| Hapana Sound Output |
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| Yakakanganiswa Inzwi |
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| AmpLifier Kupisa |
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9. Zvinotsanangurwa
| Feature | Tsanangudzo |
|---|---|
| Model | IR400.1_BASS |
| RMS Power (14.4V) | 400W RMS @ 2 Ohms |
| Channels | 1 (Monoblock) |
| Minimum Impedans | 2 Ohms |
| Yakadzika Pass Firita (LPF) | 35Hz ~ 250Hz |
| High Pass Sefa (HPF) | 5Hz ~ 35Hz |
| Bass Boost Gain | 0dB ~ +15dB |
| Bass Boost Frequency | 35Hz ~ 60Hz |
| Chiyamuro Voltage | 9V ~ 15V DC |
| Fiyuzi Chiyero | 30A |
| Power/Ground Wire Gauge | 6mm² (approx. 10 AWG) |
| Remote Wire Gauge | 0.75mm² (approx. 18 AWG) |
| Mutauri Wire Gauge | 2.5mm² (approx. 14 AWG) |
| Zviyero zveChigadzirwa (L x W x H) | 5 x 3.9 x 2 inches |
| Kurema | 1.21 Pondo |
10. Warranty uye Tsigiro
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.
Zvekushandisa Pamhepo: