In the name of God, the Most Gracious, the Most Merciful I present to you a 12-inch subwoofer box Aero port The tuning is 32hz and you can lower or raise the tuning by just changing the port. The box is custom-designed with specialized software, not random measurements. And I had a 5000rms on it. The price is 250 riyals, and I will not shortchange the serious buyer.