Like you, unless I have as small a pair of speakers as heresys, I am unable to run a sub due to lack of space. I cheat in the low end by having my listening position against the back wall which surely boosts bass response by a minimum of 3, more than likely up to 6 dB I would guess. I can adjust for this by pulling the speakers away from the back and sidewalls. I suppose I trade some imaging for this, but I am very satisfied in that department as well. Even my Forte I OUTSIDE have bass that can be felt. I am quite surprised you felt a lack of bass response. In the past I had some ridiculous car audio systems and I am well aware of what INSANE, take your breath away bass is haha. I can vouch for the RF7 series having more bass. Of course, surface area of four 10" woofers.