How to Connect and Control Your Haozhiseng Audio DSP Plate Amplifier from a PC: USB & RS-485 Step-by-Step Guide

Active loudspeakers and powered line-array systems are increasingly popular because they simplify system wiring, reduce the need for external amplifier racks, and make setup faster and more convenient.

For manufacturers, installers, rental companies, and audio engineers building active loudspeakers or subwoofers, Haozhiseng Audio DSP plate amplifier modules provide a compact all-in-one solution combining Class-D amplification, a switching power supply, DSP processing, and PC control.

Haozhiseng Audio offers single-channel, two-channel, and three-channel amplifier modules for active full-range speakers, line arrays, stage monitors, subwoofers, and other professional audio applications.

This guide explains how to connect and control a Haozhiseng Audio DSP plate amplifier from a Windows PC using either USB or RS-485.

Important: This guide covers the DSP control connection only. Installation and mains-power wiring must be completed by qualified personnel according to the product manual and local electrical regulations.

What You Can Control with the DSP Software

Depending on the amplifier model and DSP version, the software may provide access to:

• Mute
• Polarity
• Input and output gain
• Delay
• Parametric EQ
• High-pass and low-pass filters
• Crossover settings
• Limiter settings
• Input-to-output routing
• Preset loading and saving
• Device ID configuration
• Multi-amplifier control via RS-485

The available functions may vary slightly between amplifier models and software versions.

Download the DSP Software and RS-485 Driver

Before connecting the amplifier module, download the required software from the official Haozhiseng Audio download page:

Official download center:
Download Haozhiseng Audio DSP Software and Drivers

For H-Series plate amplifier modules, download:

1. Plate Amplifier Module DSP Software
2. H-Series Plate Modules & DSP Amplifier RJ485 Driver

The download page may use the name “RJ485 Driver,” while the communication standard is normally referred to as RS-485.

After downloading the files:

1. Extract the ZIP package.
2. Install the DSP control software.
3. Install the RS-485 driver if you plan to use RS-485 communication.
4. Restart the computer if requested by the installer.

Haozhiseng Audio plate amplifier modules
Haozhiseng Audio DSP plate amplifier modules for active speakers

Connection Methods: USB or RS-485

Haozhiseng Audio DSP plate amplifier modules can normally be controlled using one of two connection methods.

USB Connection

USB is the simplest option for configuring one amplifier module at a time.

It is suitable for:

• Initial DSP setup
• Factory programming
• Individual speaker adjustment
• Preset loading and saving
• Testing one amplifier module

RS-485 Connection

RS-485 is recommended when you need:

• Longer control distances
• More stable communication in professional installations
• Control of multiple amplifier modules
• Factory batch programming
• System monitoring from one PC
• Daisy-chain communication between several powered speakers

A standard RJ45 network-style cable may be used for the RS-485 connection when it follows the required Haozhiseng pin configuration. This is an RS-485 data connection, not a standard Ethernet network connection. Do not connect the amplifier’s RS-485 port directly to a router or network switch.

Method 1: Connect One Plate Amplifier to a PC via USB

What You Need

• A Windows PC
• Haozhiseng Audio DSP control software
• A compatible USB cable
• One Haozhiseng Audio DSP plate amplifier module

Step 1: Install the DSP Software

Download and install the correct plate amplifier DSP software from the official Haozhiseng Audio Download Center.

Make sure the software version is compatible with your amplifier module.

Step 2: Connect the USB Cable

Connect one end of the USB cable to the amplifier module’s USB control port and the other end to the PC.

Suggested image: First step—connect the amplifier module to the PC
Suggested alt text: Connecting a Haozhiseng DSP plate amplifier module to a PC

Step 3: Power On the Amplifier Module

After confirming that the amplifier module is correctly installed and connected, switch on the amplifier.

Wait a few seconds for the PC to recognize the device.

Step 4: Open the DSP Software

Launch the DSP control software and select USB as the connection method.

When the connection is successful, the software connection indicator should change from:

• Red: Disconnected
• Green: Connected

You can now view and adjust the available DSP parameters.

USB connection between the plate amplifier and PC
USB control connection for Haozhiseng Audio DSP plate amplifier

Method 2: Connect One Plate Amplifier to a PC via RS-485

What You Need

• A Windows PC
• Haozhiseng Audio DSP software
• Haozhiseng Audio RS-485 driver
• A compatible USB-to-RS-485 adapter
• A compatible RJ45 cable
• One DSP plate amplifier module

Step 1: Install the RS-485 Driver

Download and install the H-Series Plate Modules & DSP Amplifier RJ485 Driver from the official download page.

Connect the USB-to-RS-485 adapter to the computer after installing the driver.

Step 2: Check the COM Port

Open Windows Device Manager and locate the USB-to-RS-485 adapter under Ports (COM & LPT).

Note the assigned COM-port number, such as:

• COM3
• COM4
• COM5

The available COM port may also be detected automatically by the DSP software.

Step 3: Connect the Amplifier Module

Connect the system in the following order:

Amplifier RS-485 Port → RJ45 Cable → USB-to-RS-485 Adapter → PC USB Port

Do not connect the RS-485 port to a router or standard Ethernet network.

Step 4: Select RS-485 Mode

Open the DSP software and select RS-485 as the communication method.

Then select:

• The COM port assigned to the adapter
• The Device ID of the amplifier module you want to control

Step 5: Confirm the Connection

When communication is established successfully, the status indicator should change from red to green.

You can then adjust the DSP parameters and save the configuration to the amplifier module.

 RS-485 single-module connection
Connecting one Haozhiseng DSP amplifier module to a PC through RS-485

Method 3: Connect Multiple Plate Amplifiers via RS-485

RS-485 allows several compatible amplifier modules to be controlled from one PC.

This is useful for:

• Powered line-array systems
• Multi-speaker installations
• Factory batch configuration
• Rental systems
• Large active PA systems
• Multiple powered subwoofers

Step 1: Assign a Unique Device ID

Before connecting multiple amplifier modules, connect and configure each module individually.

Every module must have a different Device ID.

For example:

Important: Duplicate Device IDs may cause connection conflicts or prevent the software from identifying the correct amplifier module.

Open the software configuration page, enter a unique Device ID, and save the setting to each amplifier before creating the multi-module connection.

Amplifier module Device ID setting
Setting a unique RS-485 Device ID for each DSP amplifier module

Step 2: Connect the Modules

Use the RS-485 input and link ports to connect the compatible amplifier modules in sequence.

The connection path is generally:

PC → USB-to-RS-485 Adapter → Module 1 → Module 2 → Module 3

Follow the wiring and pin-configuration information supplied with your amplifier model.

Step 3: Open the DSP Software

Launch the software and select:

1. RS-485 communication mode
2. The correct PC COM port
3. The Device ID of the amplifier you want to control

You can then select and configure each connected amplifier module individually.

Multiple amplifier modules connected to one PC
RS-485 daisy-chain control of multiple Haozhiseng DSP plate amplifiers

Troubleshooting Common Connection Problems

The Software Shows “Disconnected”

Check the following:

• The amplifier module is powered on.
• The USB or RS-485 cable is connected securely.
• The correct software version is installed.
• The correct USB or RS-485 mode is selected.
• The correct COM port is selected.
• The USB-to-RS-485 driver is installed.
• The Device ID matches the connected amplifier.
• No two amplifiers use the same Device ID.
• The RJ45 cable follows the required RS-485 pin configuration.

The COM Port Does Not Appear

Try these solutions:

1. Disconnect and reconnect the USB-to-RS-485 adapter.
2. Try another USB port.
3. Reinstall the RS-485 driver.
4. Check Windows Device Manager.
5. Restart the computer.
6. Avoid using an unpowered USB hub.

The Software Connects to the Wrong Amplifier

Check the Device ID assigned to every module. Each amplifier in an RS-485 chain must use a unique ID.

DSP Settings Cannot Be Saved

Confirm that:

• The software is connected to the correct device.
• The correct Device ID is selected.
• The amplifier is not muted or disconnected during saving.
• You are using the correct software for that DSP module.
• The configuration is saved to the device, not only to the PC.

Haozhiseng Audio DSP Plate Amplifier Module Range

Haozhiseng Audio offers amplifier modules for full-range speakers, two-way active loudspeakers, line arrays, and subwoofers.

Explore the complete range here:

View Haozhiseng Audio Plate Amplifier Modules

H1 Series: Single-Channel DSP Plate Amplifiers

Designed for active full-range speakers, subwoofers, stage monitors, and compact PA cabinets.

H2 Series: Two-Channel DSP Plate Amplifiers

Suitable for two-way active speakers, bi-amplified systems, compact line arrays, and powered subwoofers.

The H2L and H2S versions provide similar output configurations in different chassis sizes.

The H2S-TWO also provides an additional output for linking a compatible passive speaker.

H3 Series: High-Power Two- and Three-Channel DSP Modules

Designed for active subwoofers, line arrays, and multi-way professional loudspeaker systems.

Output ratings and available DSP functions may vary by production version, power-supply option, and configuration. Confirm the current specification sheet before placing an order.

Why Choose Haozhiseng Audio Plate Amplifier Modules?

Haozhiseng Audio plate amplifier modules combine compact mechanical design, efficient Class-D amplification, DSP processing, and flexible PC control.

Key advantages include:

• Single-, two-, and three-channel configurations
• USB and RS-485 control
• Integrated DSP processing
• Compact installation dimensions
• High-efficiency cooling
• Multiple output-power options
• Solutions for full-range speakers, line arrays, and subwoofers
• OEM and ODM customization support
• Multiple operating-voltage options on selected models

Need Help with Software or Module Selection?

If you are unsure which software, driver, or plate amplifier module is suitable for your project, contact Haozhiseng Audio with the following information:

• Speaker type
• Driver impedance
• Required output power
• Number of amplifier channels
• DSP functions required
• Cabinet installation dimensions
• Operating-voltage requirements
• Estimated order quantity

Our team can help you select a suitable amplifier module for your active loudspeaker, line array, or subwoofer project.

Share This Guide

If this tutorial helped you connect or configure your DSP plate amplifier, please share it with loudspeaker manufacturers, system integrators, rental companies, audio engineers, and other professional sound users.

A shared technical guide may save another engineer hours of setup and troubleshooting.

Download software and drivers:
https://hzsaudio.com/download/

Explore DSP plate amplifier modules:
https://hzsaudio.com/product_category/plate-amplifier-module/