Sounds like the bass drivers on your speakers are unable to handle lower frequencies. Use an amplified sub-woofer and carefully "dial-in" the bass response using a CD that has a lot of bass cords or scales. The object is to get a continuation of bass response where the speakers stop responding, i.e., a natural unbroken progression of bass notes down the scale.
The sub-woofer should be connected directly to the pre-amp. Hopefully your pre-amp has two sets of analog outputs. If not, you need to try a pre-amp that does.
From your description it sounds as though you are sitting 6' from the speakers, is that correct? Is that the alignment the manufacturer suggests?
The sub-woofer should be connected directly to the pre-amp. Hopefully your pre-amp has two sets of analog outputs. If not, you need to try a pre-amp that does.
From your description it sounds as though you are sitting 6' from the speakers, is that correct? Is that the alignment the manufacturer suggests?