Stetsom STX 2436 Bluetooth DSP PRO - Digital Signal Processor User Manual

1. Introduction

The Stetsom STX 2436 Bluetooth DSP PRO is an advanced digital signal processor designed to provide comprehensive control over your car audio system. This compact device offers a wide range of customizable sound adjustments, accessible via a dedicated application on your smartphone or tablet. It integrates seamlessly with existing audio setups, allowing for precise tuning and optimization of sound quality.

Figure 1: Front view of the Stetsom STX 2436 Bluetooth DSP PRO Digital Audio Processor.

2. Package Contents

Ensure all items are present in the package:

• Stetsom STX 2436 Bluetooth DSP PRO Digital Signal Processor
• Signal input cable

3. Safety Information and Installation Guidelines

Important Safety Notice:

• Installation must be performed exclusively by qualified professionals.
• Always ensure the product is turned OFF before beginning any installation or wiring.
• The use of a fuse is mandatory to protect the system from short circuits and overloads. Install the fuse as close to the battery as possible (12" maximum).

3.1 Wiring Diagram

The following diagram illustrates the typical wiring connections for the STX 2436BT. Proper connection is crucial for optimal performance and safety.

Figure 2: Wiring connections for the STX 2436BT, showing sequencer outputs, power supply, high inputs, and audio outputs.

• REM (Remote): Connects to the remote output of your radio/player (18 AWG cable recommended).
• GND: Ground connection.
• +BAT: Positive battery connection (13 AWG cable recommended, with a 1A fuse installed within 12" of the battery).
• Sequencer Outputs (S1, S2, S3): For remote activation of other components.
• High Input (A, B): For factory original stereo players. Blue wire for auto turn on, gray wire for ground.
• Audio Output (1, 2, 3, 4): RCA outputs to amplifiers.

4. Operating Instructions

4.1 App Download and Requirements

The Stetsom STX 2436BT is controlled via a dedicated mobile application. Download the "STETSOM STX2436BT" app from your device's app store.

Figure 3: App download options for Android and iOS devices.

Minimum Requirements:

• Devices with Android system from version 5.0 and Bluetooth technology 4.0 or higher.
• Devices with iOS system from version 12 or higher, with Bluetooth technology 4.0 or higher.

4.2 App Functions and Features

The exclusive Stetsom app provides real-time professional audio adjustments. Once installed, open the app to configure and use your audio processor. The Bluetooth connection offers a range of up to 49 feet in an unobstructed area.

Figure 4: Overview of the STX 2436BT app interface, highlighting settings, shortcuts, and connection status.

Key functionalities include:

• Settings: Change app and processor preferences.
• Shortcuts Panel: Simplified real-time control and visualization of processor resources.
• Connection Status: Indicates device connection and allows device selection.
• Audio Adjustments:
  • Graphic Equalizer (12 Band)
  • Parametric Equalizer
  • Crossover
  • Routing
  • Gain
  • Limiter
  • Delay
  • Phase
• Customizable Shortcuts: Personalize shortcuts for settings or tools.
• Processor Tools: Includes Audio Generator, Sequencer Configuration, and Voltmeter.

4.3 Product Features Overview

Watch this official video from Stetsom for a detailed overview of the STX 2436BT's capabilities and features.

Video 1: Official Stetsom video showcasing the STX2436BT Digital Signal Processor and its features, including app control and modular central unit.

The video highlights features such as:

• Bluetooth Connectivity: Allows wireless control from your smartphone or tablet.
• Crossover: Adjustable Butterworth and Linkwitz-Riley filters (12/18/24/36 dB/8ª).
• Sequencer: Controls the turn-on sequence of connected amplifiers.
• Graphic Input Equalizer: 15 bands with equalization presets.
• Parametric Equalizer: Per output frequency, gain, and Q factor adjustments.
• High-Precision Alignment/Delay: For precise sound staging.
• Phase Inversion: 0° to 180° adjustment.
• Limiter: Threshold from -24dB to 0dB, attack and release settings.
• Gain and Mute: -45dB to +15dB master volume control.
• Working Memory: Automatic saving of user settings.
• Frequency Generator: Includes frequency sweep and pink noise.
• Remote Trigger: Configurable interval.
• Battery Trigger: Monitoring interval.
• OAD Update: Over-the-air download for firmware updates.
• Modular Central Unit: Optional accessory for physical control.

5. Maintenance

To ensure the longevity and optimal performance of your Stetsom STX 2436BT, follow these maintenance guidelines:

• Cleaning: Use a soft, dry cloth to clean the unit. Avoid abrasive cleaners or solvents.
• Software Updates: Periodically check the Stetsom app for Over-the-Air Download (OAD) updates to ensure your device has the latest features and bug fixes.
• Connections: Regularly inspect all wiring connections to ensure they are secure and free from corrosion.

6. Troubleshooting

If you encounter issues with your STX 2436BT, consider the following common troubleshooting steps:

• No Power:
  • Check the power connections (+BAT, GND, REM) to ensure they are secure and correctly wired.
  • Verify the 1A fuse near the battery is intact. Replace if blown.
  • Ensure the vehicle's battery has sufficient charge.
• No Audio Output:
  • Confirm all RCA and High Input connections are properly seated.
  • Check the audio settings within the Stetsom app (e.g., gain levels, mute status, routing).
  • Ensure connected amplifiers are powered on and functioning correctly.
• Bluetooth Connectivity Issues:
  • Ensure Bluetooth is enabled on your smartphone/tablet and the STX 2436BT.
  • Try restarting both the STX 2436BT (by cycling power) and your mobile device.
  • Ensure your device meets the minimum app requirements (Android 5.0+ / iOS 12+, Bluetooth 4.0+).
  • Reduce the distance between your device and the STX 2436BT.
• Unexpected Sound Quality:
  • Review all equalizer, crossover, and delay settings in the app. Incorrect settings can lead to poor sound.
  • Check for proper phase alignment.
  • Ensure the input signal is not distorted or clipping.

For persistent issues, consult a qualified car audio professional or contact Stetsom customer support.

7. Specifications

8. Warranty and Support

The Stetsom STX 2436 Bluetooth DSP PRO comes with a Manufacturer 1 Year Warranty covering both labor and parts.

For warranty claims, technical assistance, or additional support, please refer to the contact information provided by Stetsom on their official website or through your authorized dealer.

You can also access technical support and assistance options within the settings menu of the Stetsom application.