Horn Size: 3 Inch+2 Inchx2, Input Power: DC 5V, Input Impedance: 10KΩ, Control: Total Volume / Bluetooth / Remote Control / USB/ TF, Output Power: 5W+2.5W*2, The Impedance Of The Bass Unit: 4 Ω, Frequency Response: 20Hz-20KHz, Box Size: 120x 190x 155mm.
Just check coupons out (with price alert and history). Do you want to know what the best price is?
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($36.16): AM15prime
2. ($37.44): BgAuMotor
3. ($37.44): b71c67
you should apply the coupon in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): 502C6B, e2bcea, ac89bd
(there’s a little possibility that old coupon will work)
Price history and price alert
Do you need price history chart (for all/most countries) for Bluetooth Subwoofer Speaker? There we go. The lowest price was: $28.04.
Price records source(s): Banggood
Click on image to enlarge. 
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)).