15W+15W 5VR Treble and Bass Knob Version Bluetooth5.0 DSP Audio Power Amplifier Board HiFi TWS Pairing Super Bass 2.0/1.1

15W+15W 5VR Treble and Bass Knob Version Bluetooth5.0 DSP Audio Power Amplifier Board HiFi TWS Pairing Super Bass 2.0/1.1

Specification:
- Bluetooth version: dual mode 5.0, support TWS (connection number: 2)
- Bluetooth name: Eiffelcon one
- Power supply voltage: 7.5 - 24V (best voltage input: 19 - 24V)
- Audio source input: USB flash drive, AUX, USB, BT
- Output channel: 2.0 (LR), 1.1 (RX)
- Output power: 15W x 2 (8R)
- Product size: 78 x 52mm

Package Included:
- 1 x Set of Power Amplifier Board

Precaution:
Audio Input Mode Switching:
- This product defaults to Bluetooth mode when powered on without any external audio devices mounted; If an external playback device is mounted, such as inserting an AUX or USB drive, it defaults to AUX or USB drive playback mode when powered on; During the playback process, follow the principle of prioritizing devices after insertion. For example, if an AUX is inserted during Bluetooth playback, it will immediately switch to AUX playback.
- When playing AUX, it is recommended to choose AUX cables with shielding layers to reduce noise.
- When using the USB sound card function, simply connect the computer with a USB data cable without installing any drivers. Most computer systems will switch to the USB sound card by default. If automatic switching is not possible, you can manually choose to switch.

Power Supply Selection:
- This product has a power supply range of 5-26VDC and is compatible with standard 5.5-2.1/2.5 power adapter plugs. It is recommended to use a standard 12V/24V power adapter with a current output of 2A or more.
- The choice of power supply size is related to the power of the speaker used. For example, when using an 8 ohm 50W speaker, a 24V power supply with a current of at least 4A may cause sound stuttering if the current is too small. Reducing the volume and output power can solve this problem.
- The power supply voltage cannot exceed 26V. If it exceeds 26V, the circuit board will be burned out.
- If the speaker does not play when powered on and keeps beeping, it is caused by insufficient power supply. Simply increase the power supply.

Speaker Selection:
- This product's amplifier can continuously output 15Wx2 power, and speakers with power below 15W can be driven. It is recommended to use 8 ohm or 4 ohm speakers.
- If there is a "hiccup" phenomenon when playing music speakers, the first consideration is insufficient power supply, and a larger power supply should be used; The second consideration is to protect the amplifier from overheating, strengthen heat dissipation, or reduce the playback volume.

Signal Issue:
- This product uses a PCB antenna, which can connect up to a visible distance of 15 meters without obstruction. If Bluetooth cannot be found or connected during use, it is considered a signal issue.
- Be sure to stay away from the router when using it.
- Avoid using on metal desktops as they can affect the PCB antenna signal.
- When modifying a speaker, if it is a metal casing, be sure to lead the antenna out of the casing, as the metal casing will shield the signal.