XY-P15W Stereo Bluetooth Power Amplifier Module 10W/15W/20W 12V/24V Class-D Audio Board

Specifications

• Model: XY-P15W
• Audio Input: Bluetooth 5.0 (Wireless)
• Output Channels: 2.0 Stereo
• Supply Voltage: DC 8V - 24V (2A or higher recommended)
• Speaker Impedance: 4Ω (8V-12V supply), 8Ω (8V-24V supply)
• Transmission Distance: ~15 meters (Line of sight)
• Protection: Reverse connection protection, Short circuit protection, Thermal protection.
• Dimensions: 50mm x 33mm x 14mm

      Output Power (at 1KHz):

• 16W * 2 @ 12V (4Ω)
• 10W * 2 @ 12V (8Ω)
• 15W * 2 @ 16V (8Ω)
• 20W * 2 @ 20V (8Ω)
• 30W * 2 @ 24V (8Ω - Requires Heatsink)

Applications

• DIY Portable Bluetooth Speaker: Combine with 18650 batteries and a BMS for a rechargeable boombox.
• Bookshelf Speaker Conversion: Turn old passive speakers into modern wireless active speakers.
• Arcade Cabinet Audio: Add wireless sound to your retro gaming setup.
• Ceiling Audio Systems: Compact size allows for hiding inside false ceilings powered by a central 12V/24V line.
• Car Audio Mod: Add Bluetooth capability to older vehicle audio systems (ensure 12V supply is clean).

Wiring & Safety Guide

      Power Supply Logic:

• If using 4Ω speakers, do NOT exceed 12V input. High voltage + Low resistance = Burnt chip.
• If using 8Ω speakers, you can use up to 24V for maximum power.

• Heatsink Warning: At output power > 20W (e.g., 24V supply), a small additional heatsink glued to the chip is highly recommended to prevent thermal shutdown.
• Signal Interference: Use a high-quality power supply. Cheap switching adapters can introduce "hum" or buzzing noise. Adding a 470uF or 1000uF capacitor across the power input terminals can help filter noise.

Bluetooth Pairing:

• Power on the module. The blue LED will flash.
• Open Bluetooth settings on your phone/PC.
• Find device named "XY-P15W".
• Click connect. You will hear a confirmation tone.

Required (Sold Separately):

• DC Power Adapter (12V 2A or 24V 3A)
• Full Range Speakers (4Ω or 8Ω)
• Connecting Wires

Package Includes: 1x XY-P15W Amplifier Module

Project Evolution

• Prerequisites: If you have mastered basic audio with the PAM8403 (3W), you know the limits of low power and wired connections.
• The Upgrade: The XY-P15W unlocks Wireless Freedom and Room-Filling Sound. You can now build speakers that actually connect to your phone instantly and are loud enough for a living room party.
• Effort Level: Beginner. No coding required. Just pure hardware assembly.
• Requirements: You will need a DC Power Source (Adapter or Li-Ion Pack) and two Passive Speakers.

Frequently Asked Questions (FAQ)

• What is the recommended power supply for the XY-P15W?
  A DC power supply between 8V and 24V is required. 12V-2A is ideal for 4Ω speakers; 24V-3A is best for 8Ω speakers to achieve max power.
• Can I use a 12V battery to power this module?
  Yes, a 12V lead-acid or 3S Li-Ion battery pack works perfectly, making it great for portable projects.
• Does this amplifier board support stereo output?
  Yes, it is a dual-channel (2.0) stereo amplifier capable of driving Left and Right speakers independently.
• How do I pair my phone with the XY-P15W?
  Simply power the board, search for "XY-P15W" in your device's Bluetooth settings, and tap to connect. No password is usually needed.
• What happens if I connect 4Ω speakers to a 24V supply?
  Do not do this. This will draw excessive current, causing the amplifier chip to overheat and potentially burn out. Limit voltage to 12V for 4Ω speakers.
• Does the board have volume control?
  Yes, this specific version of the XY-P15W features a physical volume control knob (potentiometer) on the board.
• Is there a password for Bluetooth connection?
  No, the module uses open pairing and does not require a PIN code.
• Can I connect a subwoofer to this board?
  No, this is a full-range stereo board. For a subwoofer, you would need a 2.1 channel amplifier or a separate mono bass amp.
• What is the maximum Bluetooth range?
  The Bluetooth 5.0 chip supports stable connection up to 15 meters in an open area without obstacles.
• Do I need to add a heatsink?
  For normal use (under 20W total), no. If running at 24V with 8Ω speakers at high volume, adding a small heatsink to the main chip is recommended.
• Does it have reverse polarity protection?
  Yes, the board includes basic protection, but it is always best practice to double-check polarity (+ and -) before powering on.
• Can I use this with Arduino or Raspberry Pi?
  You can use it as an audio output device for a Raspberry Pi (via Bluetooth), but it cannot be directly controlled via GPIO pins.
• Why is there a humming noise from the speakers?
  This is usually caused by a "noisy" power supply or ground loop. Try a different power adapter or add a filter capacitor (1000uF) at the power input.
• What is the size of the board?
  It is very compact, measuring approximately 50mm x 33mm, making it easy to fit into small enclosures.
• Does it support AUX (3.5mm) input?
  No, this specific model is Bluetooth-input only. It does not have a wired AUX jack.
• Is the Bluetooth connection stable?
  Yes, Bluetooth 5.0 ensures a stable connection with lower latency compared to older Bluetooth 4.0 modules.
• Can I power it with a 9V battery?
  A standard 9V HW battery has too little current capacity and will drain instantly. Use a proper 9V/12V adapter or high-capacity rechargeable batteries.