1. Supports 2.2-channel power output; dual 145W subwoofers require no additional expansion
2. Lossless decoding supports multiple formats and is compatible with multi-channel inputs in PC mode
3. Dual-encapsulated, replaceable audiophile-grade operational amplifiers; includes a reserved microphone expansion port for strong expandability
4. Independent volume control for left/right channels and dual subwoofers; customizable treble, midrange, and bass equalization
5. Suitable for various audio-visual scenarios, including home desktop audio systems, retail store speakers, and car audio upgrades
Product Name: 2.2-Channel Bluetooth Amplifier Board 75W+75W+145W+145W
Product Model: ZK-TB22
Power Supply Requirements: Operating voltage range 12–24 VDC; recommended voltage 24 V; current 10 A or higher DC power supply. Do not use a 24 V battery, as overvoltage may occur when fully charged. DC power supply is mandatory; AC power is not supported!!! If using a DC/DC boost module, it is recommended to set the output voltage to 80% of the limit voltage to prevent module damage caused by overvoltage due to overshoot or ripple!!!
Maximum Power: Left and Right Channels ≤ 75W; Subwoofer ≤ 145W
Compatible Speakers: Left and Right Channels: 20–75W, 4–8Ω; Subwoofer: 50–150W, 2–8Ω
Bluetooth Range: 15 meters
Input Methods: Bluetooth + AUX + PC + USB; Bluetooth takes priority; Bluetooth must be disconnected when using an audio cable
Number of Channels: 2.2 (left and right channels + dual-channel subwoofer)
Protection Mechanisms: Input undervoltage, overheating, overcurrent, and short-circuit protection; includes reverse polarity protection
Product Dimensions: 117 x 116 mm (with integrated potentiometer); 117 x 101 mm (with external potentiometer)
1 x Amplifier Board
1 x Screwdriver
1. Customer satisfaction is our top goal. We believe our items are so outstanding. All products are quality checked. They are new and in good condition when shipped to our customers. We are convinced you will be happy with your Purchase.
2. If product is defective or damage upon arrival, or wrong product shipped, please contact us immediately. Returns accepted within 14 days of delivery date and item must be in original new condition, not worn or altered in any way with attached tags & wrap. Otherwise deal is final. Return shipping must be paid by buyer.
3. Please contact us first if you have any problems/questions/concerns. We will be happy to resolve any issues you may have in a cordial and friendly manner.
4. We appreciate your Postive Feedback, and will do the same in return. DO NOT leave negative feedback without first communication with us. Ple
1. Customer satisfaction is our top goal. We believe our items are so outstanding. All products are quality checked. They are new and in good condition when shipped to our customers. We are convinced you will be happy with your Purchase.
2. If product is defective or damage upon arrival, or wrong product shipped, please contact us immediately. Returns accepted within 14 days of delivery date and item must be in original new condition, not worn or altered in any way with attached tags & wrap. Otherwise deal is final. Return shipping must be paid by buyer.
3. Please contact us first if you have any problems/questions/concerns. We will be happy to resolve any issues you may have in a cordial and friendly manner.
4. We appreciate your Postive Feedback, and will do the same in return. DO NOT leave negative feedback without first communication
When you satisfied with our product and services please leave us positive feedback.
If a problem occurs, contact us immediately with any email request. Just contact us using the " Ask the seller a question" link on eBay.We will maill bakc within 24hours