I replaced my Infinity hu with a Kenwood hu, speaker level out to the infinity amp and turned the output from the Kenwood down in settings.
Bass is not lacking , considering their size the woofers do an awesome job.

Are you sure the woofers are actually working ?

I dont like the ergonomics of my kenwood , its difficult to see and the buttons are too crowded. but it does Sound great and has a ton of features.

ymmv