1. Introducció
The Stetsom STX 104 PRO is a high-precision digital electronic crossover designed to optimize your car audio system's sound quality. It features 5 channels, allowing for precise frequency separation and signal processing to ensure each speaker receives the ideal audio range. This manual provides detailed instructions for installation, operation, and maintenance to help you achieve the best performance from your device.
Característiques principals:
- Compact design for easy integration.
- 5 independent channels for versatile audio configuration.
- Customizable sound adjustments for precise tuning.
- Digital signal processing for high accuracy.
2. Informació de seguretat
Please read all safety instructions carefully before installing and operating the STX 104 PRO. Failure to follow these guidelines may result in injury or damage to the device or vehicle.
- Seguretat elèctrica: Always disconnect the vehicle's battery before making any electrical connections. Ensure all wiring is properly insulated and secured to prevent short circuits.
- Instal·lació: Install the device in a dry, well-ventilated area away from direct sunlight, excessive heat, or moisture. Avoid mounting in locations that obstruct vehicle operation or safety features.
- Instal·lació professional: Si no esteu segurs sobre algun dels passos d'instal·lació, demaneu ajuda a un professional qualificat de l'àudio per a cotxes.
- Voltage: Assegureu-vos que la font d'alimentació voltage es troba dins del rang especificat (10-16 V CC).
3. Producte acabatview
The Stetsom STX 104 PRO is designed for intuitive control and robust performance. Below is an overview of the unit and its primary components.

Figura 3.1: Frontal view of the Stetsom STX 104 PRO crossover, showcasinel seu disseny compacte i la disposició de control.

Figure 3.2: Top-down diagram of the STX 104 PRO, illustrating the various control knobs and switches for audio adjustment and signal routing.
Controls i connexions:
- Power Terminals (+BAT, GND, REM): Connections for battery positive, ground, and remote turn-on.
- Secció d'entrada: RCA inputs for Front, Low/Rear audio signals. Includes Mono/Stereo mode switch and Phase adjustment.
- Filtre subsònic: Adjustable filter to remove ultra-low frequencies, protecting subwoofers.
- Intensificació dels sons més greus: Control for enhancing bass frequencies.
- Controls de nivell: Independent gain adjustments for each output channel (Flat Out, Low/Rear Out, Mid Low Out, Mid Out, High Out).
- Crossover Filters (Low Pass, High Pass): Adjustable filters for setting frequency ranges for each output channel.
- Phase Switches: 0°/180° phase adjustment for each output channel.
- Sortides RCA: Dedicated outputs for Flat, Low/Rear, Mid Low, Mid, and High frequency ranges.

Figura 3.3: posterior view of the STX 104 PRO, showing the array of RCA input and output jacks for connecting to amplifiers and source units.
4. Configuració i instal·lació
Una instal·lació correcta és crucial per a un rendiment òptim. Seguiu aquests passos amb atenció.
4.1 Muntatge de la unitat
Choose a secure, dry location in your vehicle, away from heat sources and moisture. Ensure adequate ventilation. Use the provided mounting brackets and screws to firmly attach the STX 104 PRO.

Figura 4.1: lateral view of the STX 104 PRO, highlighting the integrated mounting brackets for secure installation.
4.2 Connexions de cablejat
- Connexió d'alimentació:
- Connecteu el + BAT terminal to the vehicle's positive battery terminal (or a fused constant 12V source) using appropriate gauge wire. Install an inline fuse (not supplied) as close to the battery as possible.
- Connecteu el GND terminal to a clean, unpainted metal chassis ground point in the vehicle.
- Connecteu el REM terminal to the remote turn-on output of your head unit or other signal source.
- Connexió d'entrada d'àudio:
- Connect the RCA outputs from your head unit (Front, Rear/Subwoofer) to the corresponding ENTRADA RCA jacks on the STX 104 PRO.
- Connexió de sortida d'àudio:
- Connecteu el SORTIDA RCA jacks (Flat Out, Low/Rear Out, Mid Low Out, Mid Out, High Out) to the corresponding input channels on your amplifiers. Ensure correct channel assignment (e.g., Low Out to subwoofer amplifier, High Out to tweeter ampmés viu).
5. Instruccions de funcionament
The STX 104 PRO offers extensive control over your audio signal. Adjustments should be made incrementally and with careful listening.
5.1 Configuració inicial i ajust de guany
- Set all Level controls on the STX 104 PRO to minimum.
- Estableix-ho tot ampel lifier guanya al mínim.
- Play a familiar piece of music at a moderate volume from your head unit.
- Slowly increase the Level control for one output channel (e.g., High Out) on the STX 104 PRO until the sound is clear and undistorted.
- Adjust the gain on the corresponding amplifier until the desired volume is reached without distortion. Repeat for all channels.
5.2 Crossover Adjustments
The STX 104 PRO allows you to define the frequency range for each speaker set.
- Filtre subsònic: Use this to remove frequencies below your subwoofer's effective range (e.g., 30Hz or 50Hz) to prevent damage and improve sound quality.
- Low Pass (LPF): Sets the upper frequency limit for a channel. Typically used for subwoofers (e.g., 80Hz-120Hz).
- High Pass (HPF): Sets the lower frequency limit for a channel. Typically used for mid-range speakers and tweeters (e.g., 80Hz for mid-bass, 2.5KHz for tweeters).
- Mid Low / Mid / High Crossover Points: Adjust these knobs to precisely define the frequency bands for your mid-bass, mid-range, and high-frequency speakers. Refer to your speaker specifications for recommended crossover points.
5.3 Phase Adjustment
The Phase switch (0°/180°) helps ensure that all speakers are acoustically in phase, preventing cancellation and improving bass response and sound imaging. Experiment with both settings for each channel to find the optimal sound.
5.4 Augment de baix
The Bass Boost control allows for a subtle enhancement of low frequencies. Use sparingly to avoid distortion.
6. Manteniment
The Stetsom STX 104 PRO requires minimal maintenance to ensure long-term performance.
- Neteja: Use a soft, dry cloth to wipe down the unit. Do not use harsh chemicals or abrasive cleaners.
- Connexions: Reviseu periòdicament totes les connexions del cablejat per assegurar-vos que estiguin ben fixades i que no presentin corrosió.
- Medi ambient: Ensure the installation location remains dry and free from excessive dust or extreme temperatures.
7. Solució De Problemes
If you experience issues with your STX 104 PRO, refer to the following common problems and solutions.
| Problema | Causa possible | Solució |
|---|---|---|
| No sound from system | No power to STX 104 PRO; Incorrect wiring; Head unit or ampqüestió de lifier. | Check power, ground, and remote connections. Verify fuse. Ensure head unit and ampEls transformadors estan encesos i funcionen. |
| So distorsionat | Gain set too high; Incorrect crossover settings; Poor signal quality. | Reduce Level controls on STX 104 PRO and/or amplifier gains. Re-evaluate crossover points. Check RCA cables for damage. |
| Greus febles o inexistents | Subwoofer channel level too low; Incorrect low pass filter setting; Phase issue. | Increase Low Out Level. Adjust Low Pass filter. Experiment with the Phase switch on the subwoofer channel. |
| Hissing or noise | Ground loop; Poor quality RCA cables; Gain set too high. | Ensure proper grounding. Use high-quality shielded RCA cables. Reduce gain settings. |
8. Especificacions
Detailed technical specifications for the Stetsom STX 104 PRO.
| Característica | Especificació |
|---|---|
| Model | STX104 |
| Dimensions (L x A x A) | 10.39 x 6.3 x 1.3 polzades (26.4 x 16.0 x 3.3 cm) |
| Pes | 1.72 lliures (0.78 kg) |
| Nombre de canals | 5 |
| Vol. Operatiutage | 10 V - 16 V CC |
| Impedància d'entrada | 10 K ohm |
| Maximum Input RMS | 4 V RMS |
| RMS de sortida màxima | 9 V RMS |
| Ràtio senyal / soroll | > 90 dB |
| Distorsió harmònica total (THD) | <0.02% |
| Separació de canals | > 80 dB |
| Filtre subsònic | Adjustable (e.g., 30Hz, 50Hz, 80Hz, Flat) |
| Desnivells creuats | 12 dB/octava |
| Compliment | FCC |
9. Garantia i Suport
Stetsom products are manufactured to high quality standards. For warranty information and technical support, please refer to the documentation included with your purchase or visit the official Stetsom weblloc web. Conserveu el comprovant de compra per a reclamacions de garantia.
For further assistance, you may contact Stetsom customer service or an authorized dealer.





