Check coupons or create price alert down below. You probably want to know what is the best price?
SNR: >85dB, Input: AUX（line）, Harmonic Distortion: <0.5% 4W 1KHz, Input Voltage: AC100-220V DC12V, Frequency Response: 20Hz-20kHz, Size: About 16 * 14.5 * 5.4cm / 6.2 * 5.7 * 2.1", Plug（Option): EU Plug / US Plug, Power: 800W
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in Europe 
. I don’t really know if this price is reasonable, coz there’s no price history in my DB. Only one coupon available!
Link: Banggood product page
1. ($25.49): BG1b5830
apply it in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGAUDIO, BG9ba0e8, BGAudio3
(I don’t think these’re gonna work, but you can try ’em out anyway)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. China – 800W Bluetooth HiFi Digital Power Amplifier ($-3)
Price history and price alert
It doesn’t make sense to generate price history chart, because there is one price record which is: $25.49.
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).