I plan to use this to drive piezoelectric tweeters at ultrasonic frequencies. What is the upper range of this amplifier?

The TI datasheet for the chip used in this amplifier shows about 28db of gain in a pretty flatline between 20 Hz to almost 40KHz. By 100KHz you lose about 6db of gain. So assuming their isn't additional RC filtering on your input signal. All bets are off with Bluetooth though. My guess is you are going to lose anything about the typically specified 20 - 20KHz using a bluetooth input just due to the ADC limitations.

Do you know what size of nut I need for the volume nob? I need a new one

Bring the board to a hardware store and see if you can find one, but being such a big ID and small OD and super thin, you're going to be hard pressed to find one without ordering the specific potentiometer

can you custom name the bluetooth device?

Yes on a iPhone you can! Go to blue tooth devices.... click the name you connected to ( when connected to the device) go to info and rename device.

Why am i getting a buzzung when there is no music? Very small audible hum

I initially had a hum when I plugged into the headphone jack of my tv as well. I simply had to adjust the tv sound settings to Theater mode and the hum went away and the sound now works great!

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ZK-1002 Bluetooth Amplifier Board with TPA3116D2 Chip Bluetooth and AUX Input DC: 5-24V

Product ID: 160287121

Details

Item dimensions L x W x H
3.35 x 2 x 1
Manufacturer
DAMGOO
Maximum Supply Voltage
24 Volts (DC)
Minimum Supply Voltage
5 Volts
Voltage
24 Volts

⚡Wide 5-24V DC input range

📶Bluetooth 5.0 + AUX dual input

🔊TPA3116D2 HiFi Chip, <0.1% THD

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Description

🎶 Elevate your sound game with power, clarity, and wireless freedom!

SEAMLESS CONNECTIVITY - Switch between cutting-edge Bluetooth 5.0 wireless streaming and classic AUX input for ultimate audio versatility.
BUILT TO LAST PROTECT - Engineered with over-voltage, under-voltage, over-heat, and short-circuit protections to safeguard your investment and ensure uninterrupted playback.
CRYSTAL CLEAR SOUND QUALITY - Experience pristine audio with advanced TPA3116D2 chip and AM interference suppression for less than 0.1% distortion.
OPTIMIZED FOR YOUR SPEAKERS - Maximize your sound by pairing with quality speakers and the right power supply—because your audio deserves the perfect match.
POWER FLEXIBILITY ON DEMAND - Supports a broad 5-24V DC input range, letting you power your setup with everything from 9V batteries to 24V adapters effortlessly.

The ZK-1002 Bluetooth Amplifier Board by DAMGOO features the high-performance TPA3116D2 chip delivering less than 0.1% THD for superior audio clarity. It supports a versatile DC input range from 5V to 24V, enabling flexible power options. Dual audio inputs include Bluetooth 5.0 for wireless convenience and AUX for traditional wired connections. Comprehensive protection circuits ensure durability and reliability. Compact and efficient, this amplifier is ideal for upgrading your audio setup with professional-grade sound and connectivity.

Specifications

ASIN	B07XG33WPN
Best Sellers Rank	#31,852 in Electronics ( See Top 100 in Electronics ) #174 in Audio Component Amplifiers
Brand Name	DAMGOO
Customer Reviews	4.5 4.5 out of 5 stars (1,197)
Included Components	AMPLIFIER BOARD
Item Dimensions	3.35 x 2 x 1 inches
Item Weight	130 Grams
Manufacturer	DAMGOO
Maximum Supply Voltage	24 Volts (DC)
Minimum Supply Voltage	5 Volts
Model	ZK-1002
Mounting Type	Surface Mount
Number of Channels	2
Package Type Name	anti-static bag
Part Number	1002
Supply Current	1.5 Amps
UPC	194852390287
Unit Count	1 Count
Voltage	24 Volts

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¥3406

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Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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