Gold-B059 2×100W Class D Digital Stereo Power Amplifier Board

What Is This Product?

The Gold-B059 is a high-power 2-channel Class-D stereo audio amplifier board designed for DIY speakers, home audio systems, multimedia speaker projects and custom audio amplifier builds.

The board provides separate left and right stereo speaker outputs with a claimed maximum output rating of up to 100W per channel, depending on the supply voltage, speaker impedance, input signal and available power-supply capacity.

It operates from a 12V–24V DC power source, with a 24V 8A–10A regulated SMPS recommended for high-power operation.

Audio can be connected through the available 3.5mm AUX input or 3-pin audio input header, making the board suitable for integration with compatible audio sources and decoder modules.

Dual aluminium heat sinks help dissipate heat during higher-power operation, while the Class-D architecture provides high electrical efficiency compared with traditional linear amplifier designs.

Why Choose Gold-B059?

• High-power stereo amplifier platform

• Up to 2×100W claimed maximum output

• Wide 12V–24V DC input range

• Supports common 4Ω–8Ω speakers

• High-efficiency Class-D architecture

• Dual heat-sink cooling

• Compact PCB format

• Suitable for custom speaker and amplifier projects

Compatibility

Compatible Speakers

The Gold-B059 is listed for speakers with nominal impedance of:

• 4Ω

• 6Ω

• 8Ω

For a stereo system, connect one suitable speaker to each output channel.

Always ensure that the speakers are capable of handling the intended amplifier output.

Compatible Power Supplies

The board operates from:

DC 12V–24V

For higher-power operation, a:

24V DC 8A–10A regulated SMPS

is recommended.

A lower-voltage or lower-current supply may operate the amplifier but will generally limit the maximum obtainable output power.

Audio Sources

The board provides:

• 3.5mm AUX audio input

• 3-pin audio input header

This makes it suitable for integration with compatible line-level audio sources and audio decoder modules.

Required for a Complete Amplifier System

In addition to this board, you will generally need:

• Suitable 12V–24V DC power supply

• Left speaker

• Right speaker

• Audio source

• Appropriate audio cable

• Speaker wiring

• Suitable enclosure if required

Before Purchase

Check these four items:

1. Power Supply

Make sure your DC supply voltage is within the supported 12V–24V range.

2. Speaker Impedance

Use compatible 4Ω–8Ω speakers.

3. Speaker Power Handling

Choose speakers appropriate for the intended operating power.

4. Cooling

Provide adequate ventilation around the heat sinks, especially when operating at higher supply voltage and output levels.

Applications

• DIY stereo amplifiers

• Home audio systems

• Bookshelf speaker projects

• Active speaker systems

• Multimedia speakers

• Custom sound systems

• Workshop audio systems

• Educational audio projects

• Class-D amplifier experiments

• Speaker cabinet projects

• Audio electronics prototyping

• Custom stereo amplifier enclosures

Suitable For

• DIY audio builders

• Electronics hobbyists

• Speaker manufacturers

• Audio repair technicians

• Engineering students

• Electronics laboratories

• Custom amplifier builders

• Embedded audio projects

📦 What's Included

❌ What's Not Included

Unless specifically supplied as part of a separate bundle, the standard product listing does not include:

• DC Power Supply / SMPS

• Speakers

• Subwoofer

• Audio Input Cable

• Speaker Wires

• Audio Decoder Module

• Bluetooth Receiver Module

• Enclosure / Cabinet

• Cooling Fan

• AC Power Cable

• Volume Control / External Pre-Amplifier

• Connectors or accessories not shown as part of the board

Important Purchase Note

This product is an amplifier PCB/module, not a complete ready-to-use home amplifier.

To build a working stereo audio system, additional components such as a suitable DC power supply, speakers, audio source and wiring are required.

Important Model Note

The current technical specification confirms the model as:

Gold-B059

Before advertising a specific amplifier IC configuration or Bluetooth version, verify the markings and hardware fitted to the actual stock batch.

PCB layout, component brands, connectors and heat-sink appearance may vary between production batches while maintaining the intended basic functionality.

Getting Started

Step 1 — Inspect the Board

Before applying power, identify:

• DC power input

• Left speaker output

• Right speaker output

• 3.5mm AUX input

• Audio input header

• Heat sinks

Check the PCB for physical damage or loose components before installation.

Step 2 — Select the Power Supply

Use a regulated DC power supply within:

12V–24V DC

For high-output operation, RoboGears recommends:

24V DC, 8A–10A

Never exceed the specified maximum input voltage.

Step 3 — Select the Speakers

Use speakers within the listed impedance range:

4Ω–8Ω

Make sure the speakers have suitable power-handling capability for the intended listening level.

Step 4 — Connect the Speakers

Connect:

• Left speaker → Left channel output

• Right speaker → Right channel output

Verify speaker wiring before applying power.

Avoid shorting the speaker output terminals.

Step 5 — Connect the Audio Source

Connect a compatible line-level source through:

• 3.5mm AUX

or

• 3-pin audio input header

according to your system design.

Step 6 — Reduce the Source Volume

Before first power-up, reduce the source/output level.

This helps prevent sudden high-volume output when the amplifier starts.

Step 7 — Apply DC Power

Check power-supply polarity carefully before connection.

Then switch on the DC supply.

Step 8 — Start at Low Volume

Play an audio signal at low level first.

Confirm:

• Left channel works

• Right channel works

• No abnormal noise

• No excessive heating

• Speakers operate correctly

Step 9 — Increase Output Gradually

Increase the source level gradually while monitoring:

• Sound quality

• Speaker movement

• Heat-sink temperature

• Power-supply stability

Step 10 — Install in an Enclosure

For permanent installations, use an enclosure with sufficient airflow around the heat sinks.

Avoid completely sealing the board inside an unventilated enclosure.

Basic System Layout

Audio Source → Gold-B059 Amplifier → Left & Right Speakers

and

12V–24V DC Power Supply → Gold-B059 Amplifier

Recommended High-Power Configuration

For applications intended to approach the board's higher output capability:

24V DC / 8A–10A Regulated SMPS + Suitable 4Ω–8Ω Speakers + Adequate Ventilation

Actual obtainable output remains dependent on the complete electrical and thermal setup.

🔧 Prototyping and Engineering Tips from RoboGears

1. Power Supply Quality Matters

A high-power audio amplifier can only perform as well as its power source.

An undersized supply may cause:

• Distortion

• Reduced maximum volume

• Voltage drop

• Clipping

• Amplifier instability

• Power-supply shutdown

For high-power operation, use a good-quality regulated supply with adequate current capacity.

2. 24V Gives More Output Headroom

The amplifier supports 12V–24V operation, but maximum available output power will not be the same across this entire range.

Higher supply voltage generally provides more available output headroom, subject to the amplifier design, speaker load and thermal limits.

3. Don't Treat 2×100W as Guaranteed Continuous Power

The actual output depends on the complete system.

Do not expect 100W per channel simply because a 12V supply is connected.

Supply voltage, speaker impedance and available current significantly affect achievable power.

4. Use Correct Speaker Impedance

Use speakers within the listed:

4Ω–8Ω range

Do not connect a speaker load below the supported impedance unless specifically verified for the board.

5. Keep Speaker Wires Short and Adequately Sized

Higher speaker current means wiring resistance becomes increasingly important.

Use appropriately sized speaker cable and avoid unnecessarily long runs.

6. Maintain Good Grounding

Poor audio grounding can introduce:

• Hum

• Buzz

• Noise

• Interference

Use clean wiring and avoid unnecessary ground loops.

7. Use Shielded Audio Cable

For the low-level input signal, shielded audio cable can help reduce interference and unwanted noise.

8. Keep Input Wiring Away From Power Wiring

Avoid routing sensitive audio-input wiring directly alongside high-current power or speaker wiring.

This can help reduce noise pickup.

9. Provide Airflow Around the Heat Sinks

The board uses dual aluminium heat sinks.

Do not block them with:

• Foam

• Wiring

• Enclosure walls

• Decorative material

Provide ventilation for sustained higher-power use.

10. Test at Low Volume First

When building a new amplifier system:

Power Check → Speaker Check → Input Check → Low-Volume Test → Gradual Power Increase

This makes troubleshooting safer and easier.

11. Never Reverse the DC Supply

Check positive and negative polarity before powering the amplifier.

Incorrect polarity can damage electronic components.

12. Never Short the Speaker Outputs

Keep speaker terminals and exposed wires isolated.

A speaker-output short circuit can activate protection or potentially damage the system.

⚠️ Troubleshooting

Amplifier Has No Output

Check:

• DC input voltage

• Power polarity

• Audio source

• AUX connection

• Speaker connections

• Speaker condition

Sound Is Distorted at High Volume

Possible causes include:

• Insufficient power-supply current

• Supply-voltage drop

• Amplifier clipping

• Excessive source level

• Speaker limitation

• Thermal stress

Amplifier Works at Low Volume but Cuts Out at High Volume

Check whether the power supply can deliver sufficient current.

Also inspect thermal conditions and speaker impedance.

Hum or Buzz Is Present

Check:

• Audio cable shielding

• Grounding

• Power-supply quality

• Cable routing

• Source device

Heat Sinks Become Very Hot

Reduce output level and improve airflow.

Also verify speaker impedance and power-supply conditions.

Engineering Principle

High amplifier performance requires the complete system to be correctly matched:

Clean Audio Input + Adequate DC Supply + Correct Speaker Load + Proper Wiring + Effective Cooling

The amplifier board alone does not determine the final output power or sound quality.

FAQ

1. What is the Gold-B059?

The Gold-B059 is a 2-channel Class-D stereo audio power amplifier board designed for DIY and custom audio systems.

2. What is the maximum claimed output?

The board is listed with a maximum output rating of:

100W + 100W

Actual obtainable output depends on the power supply, speaker impedance, input signal and thermal conditions.

3. What input voltage does it require?

The supported input range is:

DC 12V–24V

4. Which power supply is recommended?

For high-power operation, RoboGears recommends:

24V DC, 8A–10A regulated SMPS

5. Can I use a 12V supply?

Yes, 12V is within the listed operating range.

However, the available maximum output power will be lower than with a suitable higher-voltage supply.

6. Which speaker impedance is supported?

The board is listed for:

4Ω–8Ω speakers

including common:

• 4Ω

• 6Ω

• 8Ω

loads.

7. Is this a stereo amplifier?

Yes.

It provides two output channels:

• Left

• Right

8. Is this a 2.1-channel amplifier?

No.

The Gold-B059 is a 2.0-channel stereo amplifier.

It does not provide a dedicated subwoofer output in the currently published specification.

9. Can I connect a passive subwoofer directly?

There is no dedicated subwoofer channel listed.

For a conventional 2.1 system, use a suitable amplifier designed with a dedicated subwoofer output or an appropriate crossover/amplification arrangement.

10. Does it have a 3.5mm AUX input?

Yes.

The current specification lists a 3.5mm AUX input.

11. Does it have an audio input header?

Yes.

A 3-pin audio input header is also listed.

12. Does the package include a power supply?

No.

The standard package contains the amplifier board only.

13. Are speakers included?

No.

Speakers need to be purchased separately.

14. Does the board require cooling?

The board has dual aluminium heat sinks.

Adequate airflow is recommended, particularly during sustained high-power operation.

15. Does it have protection features?

The current specification lists:

• Over-temperature protection

• Over-current protection

• Short-circuit protection

16. Can I use it for a DIY home amplifier?

Yes.

It is suitable for compatible DIY stereo speakers, home audio systems, multimedia systems and custom amplifier projects.

17. Does it use TPA3116D2 ICs?

The older product URL identifies the product as a 2 × TPA3116D2 version, but the current published technical specification does not independently identify the amplifier IC.

For an accurate listing, verify the IC markings on the current physical stock before advertising the exact IC configuration.

18. Does it have Bluetooth?

The older product URL contains the word Bluetooth, but Bluetooth is not currently listed in the live technical specification or input specification.

Verify the current Gold-B059 stock physically before advertising built-in Bluetooth functionality.

19. Is 2×100W available at every supply voltage?

No.

The 2×100W figure is a maximum claimed rating.

Actual power depends on:

• Input voltage

• Available supply current

• Speaker impedance

• Signal level

• Thermal conditions

• Overall system design

Important Note

This is a high-power DIY audio amplifier board, not a complete finished amplifier.

Use a regulated DC power supply within the specified voltage range, observe correct polarity, use compatible speakers and provide adequate cooling.

Do not connect or disconnect speaker wiring while exposed conductors can short together.

Actual output power depends on the complete system configuration.

PCB layout, component brands, connectors and heat-sink appearance may vary between production batches without materially changing the intended product function.