ZK MT21 Bluetooth 2.1 Channel Audio Amplifier Module 12-24V for 20-100W 4-8Ω Speakers

Discover our Bluetooth digital power amplifier module, designed for stable and versatile audio performance. Enjoy a reliable wireless connection with Bluetooth 5.0, offering a transmission range of up to 15 meters (49 feet) in open spaces. For wired connections, a 3.5mm AUX audio input port is also available. This compact module, featuring a 36x25x10mm heat sink, is designed for wide applicability. It operates with a 12-24V DC power supply and a minimum of 5A (caution: do not connect to a 24V battery pack) and is suitable for 20-100W speakers with an impedance of 4-8 Ω. Your peace of mind is ensured by multiple built-in protections: against short circuits, overcurrent, overheating, and reverse polarity. For easy power supply, a DC converter plug is included. The module is compatible with standard DC adapters (5.5mm x 2.1mm plug). If your current adapter has a different plug, don't worry! A DC adapter is included in the package. Important note: To obtain maximum output power, ensure that the audio input signal is of good quality and that the power supply provides sufficient voltage and current. Output power increases with higher supply voltage and lower speaker impedance. Always ensure that your power supply's output is greater than the amplifier's actual power consumption.

**Product Details:**

* Item Type: Bluetooth Power Amplifier Board

* Material: PCB

* Heatsink Size: Approx. 36x25x10mm / 1.42x0.98x0.39in

* Bluetooth Version: 5.0 (Range: 15m/49.2ft unobstructed)

* Input Modes: Aux, Bluetooth

* Number of Channels: 2.1 channels

* Input Sensitivity: 500mV

* Amplifier Chip: Home Power Amplifier Chip

* Suitable Speakers: 20-100W, 4-8 Ω

* Protection Mechanisms: Reverse polarity protection, overheat and overcurrent protection, short-circuit protection

* Applicable Power Supply: DC 12~24V 5A or higher (do not connect to a 24V battery pack)

* Output Power: Left/Right Channel < 50W, Subwoofer < 100W

**Package Contents:**

* 1 x Bluetooth Power Amplifier Board

* 2 x Cover Plates

* 9 x Screws

* 8 x Brass Column Sets

* 5 x Adjustment Knobs

* 1 x Screwdriver

* 1 x Power Adapter