Please provide a link to Wuzhi App, since there is no manual. Is there any?

Download link for Wuzhi Audio APP for Android mobile phones: http://www.qingdaowuzhi.cn/appdownload/Wuzhi_Audio.apk For Apple iOS mobile phones, please search "wuzhi audio" in Apple App Store to download and install.

There are two versions of these. does it use tpa3251 or tpa3255? what is the minium supply voltage?

Using tpa3251, the minimum supply voltage is 12V DC, and the current should be greater than or equal to 10A.

will this amp work without the app. Or do you have to have the app for it to work?

I did download the app and ran it once. Never clicked on it again. Seems to be a bluetooth amp so you pair with it and it doesn't need an app. It does sound pretty great. You can easily talk with someone while extremely loud music is playing. I have low-end Klipsh bookshelf speakers and a Polk 10 subwoofer.

Could I run two 5.25" woofers at 2 Ohm well/safely (paired in parallel), or do a series at 8 Ohm? Woofers have a rating of RMS 50W/MAX 100W at 4Ohm.

The subwoofer one way can support 2 ohms, but the stereo there is a minimum of 3 ohms, otherwise the amplifier is easily protected. Speaker resistances greater than required are fine, mainly the lower limit. You can connect speakers in series and in parallel.

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Bluetooth Power Amplifier Board Stereo - HiFi 2.1 Channel 2X220W+350W Bluetooth 5.1 16-32V Digital Power Audio Amplifier Module Subwoofer Control with AUX/Bluetooth/USB Flash Drive (ZK-AS21)

Bluetooth Power Amplifier Board Stereo - HiFi 2.1 Channel 2X220W+350W Bluetooth 5.1 16-32V Digital Power Audio Amplifier Module Subwoofer Control with AUX/Bluetooth/USB Flash Drive (ZK-AS21)

Product ID: 454372978

Details

Manufacturer
MakerHawk
Maximum Supply Voltage
32 volts
Minimum Supply Voltage
12
Mounting Type
Surface Mount
Voltage
32 volts

📶Bluetooth 5.1 with 15m range

🔊790W max output power

🛡️Multi-layer safety protection

€ 124.72

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Sold byAmazon GreeceDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🎶 Elevate your sound game—unleash power, precision, and wireless freedom!

VERSATILE AUDIO INPUTS - Supports AUX, USB flash drives, and Bluetooth for ultimate compatibility with all your devices—streamline your setup effortlessly.
SEAMLESS WIRELESS CONTROL - Bluetooth 5.1 with app-enabled settings lets you customize volume, playlists, and even shake to change tracks—no cables, no hassle.
BUILT TO PROTECT PERFORM - Advanced short circuit, overcurrent, overheating, and anti-static safeguards ensure your investment stays safe and sound.
IMMERSIVE HI FI SOUND EXPERIENCE - 2.1 channel delivers 2x220W + 350W subwoofer power for crystal-clear audio that fills any room.
ROBUST TEXAS INSTRUMENTS AMPLIFICATION - Powered by dual TPA3251D2 chips for ultra-low distortion and high-definition sound quality that audiophiles crave.

The MakerHawk ZK-AS21 Bluetooth Power Amplifier Board is a high-performance 2.1 channel digital amplifier delivering up to 790W total output. Featuring Bluetooth 5.1 with app control, multiple input options (AUX, USB, Bluetooth), and advanced TI TPA3251D2 chips, it offers premium HiFi sound with ultra-low distortion. Designed for versatile compatibility and equipped with comprehensive safety protections, this amplifier module is perfect for professionals and audiophiles seeking powerful, customizable audio solutions.

Specifications

ASIN	B0B3D4786D
Best Sellers Rank	#57,062 in Electronics ( See Top 100 in Electronics ) #343 in Audio Component Amplifiers
Brand Name	MakerHawk
Customer Reviews	4.3 4.3 out of 5 stars (101)
Manufacturer	MakerHawk
Maximum Output Power	790 watts
Maximum Supply Voltage	32 volts
Minimum Supply Voltage	12 volts_of_direct_current
Model	ZK-AS21
Mounting Type	Surface Mount
Number of Channels	3
Number of Items	1
Number of Packs	1
Package Type Name	box
Part Number	ZK-AS21
Specification Met	FCC
Supply Current	10 A
Voltage	32 volts

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€ 124.72

Duties & taxes included

In stock

Sold byAmazon GreeceDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Greece.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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