How to increase bass for subwoofer. Use 4-inch to 60-inch subwoofer speakers. 2 tips for speakers and amplifiers. I use the transformer transformer as a choke coil divider for speakers and 10F / 220v capacitors ... note: With tip 1 You don't use capacitors. With tip 2 you want stronger bass, you will use 5 to 15uF / 350v capacitors.
When using an iron core transformer for speakers. You will benefit in UH value. The best sound and no deformation