Bluetooth 5.0 Audio Amplifier 2x50W with Subwoofer, 2.1 Channel Wireless Amplifier Module for Home Theater, AUX/USB

Discover our high-performance Bluetooth audio amplifier module, model ZK-TB21. Built on a high-quality printed circuit board (PCB), this module incorporates Bluetooth 5.0 technology for a stable, interference-free connection with a range of up to 10 meters. Enjoy an authentic stereo experience thanks to its two channels (left and right) and an excellent signal-to-noise ratio exceeding 90 dB for clear sound.

**Power Supply and Power:**

For optimal performance, we recommend an 18V, 19V, or 24V power supply with a current of at least 5A. Higher voltage provides greater output power.

You can also use a 9V or 12V (1A or 2A) power supply, but the power will be reduced, which could lead to volume distortion and affect sound quality.

* With a 12V/1A power supply: ideal for 3- to 4-inch speakers.

* With a 19V/5A or higher power supply: perfectly suited for 8- to 10-inch speakers.

**Audio Input Modes:**

This module offers two convenient input modes:

1. **Bluetooth Connection**: Priority mode. Connection is easy, and the module supports automatic reconnection.

2. **AUX Input**: For a wired connection. Note that when the AUX cable is plugged in, the module automatically switches to this mode.

Make sure the Bluetooth connection is disconnected when using the AUX input.

**Tone Controls:**

Take full control of your equalization:

* The **BASS** knob (center) adjusts the bass. Turn right to boost it, left to cut it. The center position provides a neutral sound.

* The **TREBLE** knob (left) adjusts the treble. Turn right to boost it, left to cut it. The center position offers a neutral sound.

**Technical Specifications:**

* Amplifier Chip: TPA3116D2, with interference suppression function.

* Adapter Power Supply: DC 9-24V / 2A minimum.

* Compatible Speakers: 4-8Ω, with a power rating of 15W to 100W.

* Output Power (Indicative):

* 12V: 15W x 2 (8Ω) or 30W x 2 (4Ω)

* 19V: 20W x 2 (8Ω) or 40W x 2 (4Ω)

* 24V: 30W x 2 (8Ω) or 50W x 2 (4Ω)

* Protections Integrated protections: against overvoltage, undervoltage, overheating, DC current detection, and short circuits. **Your package includes:** 1 audio amplifier module, 2 protective covers, 4 spacers, 4 mounting posts, 9 screws, 1 DC power cable, 1 adapter, and 1 screwdriver for easy and complete assembly.