Bluetooth Power Amplifier Board with Subwoofer 2.1 Channel 50W×2+100W, 12V-24V Audio Power Amplifier Module with Treble and Bass Control (ZK-MT21)

Q: Can someone please recommend the correct battery to operate this product

I purchased a 24Vdc@10 amps power supply. A lithium battery supply from parts Express using 5 18650's cells is 21Vdc and would work just fine.

Q: Will it be useful to install a crossover? or is it not necessary?

I have tree of these running Speakers and sub-woofers with no crossover.

Q: does the main volume affect the sub volume or are they completely independent?

The sub volume is not completely independent . I guess it’s kinda like having a gain adjustment on a car stereo amp ..

Q: What is the output wattage using a 12v input at 8 ohms?

12 watts or so. To get 50W you need 24V at about 3.5 amps at 4 ohms.

4.4/5

Product ID: 368986425

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Details

Item dimensions L x W x H
44.4 x 42.48 x
Voltage
20 Volts
Manufacturer
DAJUNGUO
Maximum Supply Voltage
24 Volts
Minimum Supply Voltage
12 Volts (DC)

📶Bluetooth 5.0

🔊50W×2+100W

🛡️Multiple protections

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Description

🎶 Elevate Your Audio Game!

SAFETY FIRST - Equipped with short-circuit, over-current, and over-heat protection.
UNLEASH YOUR SOUND - Experience powerful audio with 50W×2 + 100W subwoofer output.
SEAMLESS CONNECTIVITY - Bluetooth 5.0 for a wireless range of up to 49 feet.
UNIVERSAL COMPATIBILITY - Works with most DC adapters; includes a conversion plug.
TAILORED AUDIO EXPERIENCE - Customize your sound with treble and bass controls.

The TB21 PRO TPA311D2 Bluetooth Power Amplifier Board delivers robust audio performance with a total output of 50W×2 + 100W for subwoofers. It features Bluetooth 5.0 for seamless wireless connectivity, treble and bass controls for personalized sound, and multiple safety protections to ensure reliable operation. Compatible with various DC adapters, this amplifier is designed for both convenience and high-quality audio experiences.