1. Taw qhia
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.

Duab 1.1: Pem hauv ntej 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. Cov ntaub ntawv kev nyab xeeb
Nco ntsoov ua raws li cov kev ceev faj kev nyab xeeb hauv qab no kom tiv thaiv kev raug mob lossis kev puas tsuaj rau amplifier and connected components:
- Ensure the vehicle's battery is disconnected before beginning any installation.
- Nruab lub amplifier in a dry, well-ventilated location, away from direct sunlight and heat sources.
- Siv cov xov hlau ntsuas kom haum rau kev sib txuas fais fab, av, thiab lub tso suab raws li tau teev tseg hauv phau ntawv qhia no.
- Tsis txhob nthuav tawm amplifier to moisture or liquids.
- Yog tias amplifier malfunctions or emits smoke, immediately disconnect power and consult a qualified technician.
- Qhov no amplifier is designed for 12V DC automotive systems only.
3. Khoom Nta
The Stetsom IR 400.1 BASS amplifier includes the following key features:
- Fais fab tso zis: 400 Watts RMS at 14.4V into 2 Ohms.
- Class D Monoblock Design: Dedicated for bass applications, stable at 2 Ohms.
- Kev tswj lub suab:
- 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.
- Ua kom txias txias: Powerful cooler for improved ventilation and extended use.
- Cov Khoom Txuas Ruaj Khob:
- Power/Ground: 6mm² (approximately 10 AWG).
- Remote: 0.75mm² (approximately 18 AWG).
- Speakers: 2.5mm² (approximately 14 AWG).
- Fuse: 30A.
4. Cov ntsiab lus ntawm pob
Upon unpacking, verify that the following items are included:
- Stetsom IR 400.1 BASS Digital Sub Ampua neej nyob
- Tus Neeg Siv Los Siv (cov ntawv no)
Note: Additional accessories such as wiring kits, RCA cables, and subwoofers are sold separately.
5. Kev teeb tsa thiab kev teeb tsa
Kev teeb tsa kom zoo yog qhov tseem ceeb rau kev ua haujlwm zoo tshaj plaws thiab kev nyab xeeb. Yog tias koj tsis paub meej txog cov kauj ruam twg, sab laj nrog tus kws tshaj lij teeb tsa lub suab tsheb.
5.1 Chaw Nruab Nruab Nruab Nruab
Xaiv qhov chaw mounting uas yog:
- Dry and free from moisture.
- Well-ventilated to allow for heat dissipation.
- Secure, preventing movement during vehicle operation.
- Siv tau rau kev teeb tsa cov xov hlau thiab kev teeb tsa.
5.2 Kev Txuas Txuas Txuas
Refer to the installation diagram below for correct wiring. Ensure all connections are secure and properly insulated.

Duab 5.1: Sab saum toj 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.

Duab 5.2: Rov qab 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.
- Kev sib txuas hauv av (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.
- Qhib Chaw Taws Teeb (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 amplub tshuab hluav taws xob qhib thiab kaw nrog koj lub taub hau.
- 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 tswv yim: Txuas RCA cables los ntawm koj lub taub hau lub subwoofer tso zis rau amplifier's "INPUT L" and "INPUT R" RCA jacks.
- Kev nkag siab siab: 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. Cov lus qhia ua haujlwm
Ib zaug lub amplifier is installed and wired correctly, you can adjust its settings for optimal sound performance.
6.1 Pib Power-Up
Tom qab txuas tag nrho cov kev sib txuas lawm, rov txuas lub roj teeb ntawm lub tsheb. Qhib koj lub head unit. Lub 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:
- INPUT LEVEL (MIN/MAX): Qhov kev tswj no phim cov 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.
- QHIA: 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. Kev tu
The Stetsom IR 400.1 BASS amplifier requires minimal maintenance. Follow these guidelines to ensure its longevity:
- Khaws cov amplub tshuab huv si thiab tsis muaj hmoov av thiab cov khib nyiab. Siv daim ntaub mos mos thiab qhuav los ntxuav.
- Xyuas kom muaj cua txaus nyob ib puag ncig amplub tshuab cua txias. Tsis txhob thaiv cov fins txias lossis cov qhov cua.
- 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. Kev daws teeb meem
Yog tias koj ntsib teeb meem nrog koj ampua ntej nrhiav kev pab los ntawm cov kws tshaj lij, sab laj nrog cov lus qhia daws teeb meem hauv qab no:
| Teeb meem | Ua Tau | Kev daws |
|---|---|---|
| Tsis muaj zog / Amplifier tsis qhib |
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| Tsis muaj suab tso zis |
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| Distorted Suab |
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| Amplifier Overheating |
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9. Cov lus qhia tshwj xeeb
| Feature | Specification |
|---|---|
| Qauv | IR400.1_BASS |
| RMS Power (14.4V) | 400W RMS @ 2 Ohms |
| Cov channel | 1 (Ib lub thaiv) |
| Yam tsawg kawg nkaus Impedance | 2 awm |
| Tsawg Pass Lim (LPF) | 35Hz ~ 250Hz |
| High Pass Filter (HPF) | 5Hz ~ 35Hz |
| Bass Boost nce | 0dB ~ +15dB |
| Bass Boost zaus | 35Hz ~ 60Hz |
| Cov lus qhia Voltage | DC 9V ~ 15V |
| Kev Ntsuam Xyuas Fuse | 30 A |
| Power/Ground Wire Gauge | 6mm² (approx. 10 AWG) |
| Remote Wire Gauge | 0.75mm² (approx. 18 AWG) |
| Speaker Wire Gauge | 2.5mm² (approx. 14 AWG) |
| Khoom Dimensions (L x W x H) | 5 x 3.9 x 2 po |
| Qhov hnyav | 1.21 Ib |
10. Warranty thiab 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 webqhov chaw.
For further assistance, you may contact Stetsom customer service through their official channels. Keep your purchase receipt as proof of purchase for warranty claims.
Cov ntaub ntawv online: