Improvement for Bass

[mhtplsh]

i got chinese 2.1 amp 50W x 2 + 100W x1. I got the circuit. The same amp circuit is used for all three amplifiers. Only power supply voltage change & output devices are changed for 100W bass amp. I am not happy with bass. Guide me how to improve bass.

[sofaspud]

Show us the amp circuit, what low-frequency speaker(s) you are using, and tell us what you find lacking that you want to improve. I'm sure someone can then offer suggestions.

[mhtplsh]

Here are the circuits.

[mickeymoose]

Asides that the preamp schematic is incomplete and the connector symbls have no mates....The volume/level on the inputs have no correction networks for the lack of bass sensitivity of human ears to low loudness levels. E

[dragonxwas]

directly replace the 4558 with a tl072 a friend had same issue with this amp got sorted very easy..

[mhtplsh]

Originally Posted by mickeymoose

The volume/level on the inputs have no correction networks for the lack of bass sensitivity of human ears to low loudness levels. E

Need more guidance in the matter. Kindly suggest some circuit to put there.

"dragonxwas :
directly replace the 4558 with a tl072 a friend had same issue with this amp got sorted very easy.."

I will check this.