I recently replaced my Amp as I felt the combination of low power and inefficient speakers was limiting my enjoyment. New Amp. Krell KAV400xi, is a revelation! More power, lower noise floor, better control, greater clarity, texture and detail! However...I still don't have enough bass. I want deep but tight and tuneful bass without sacrificing anything I already have. Today I home auditioned KEF R3. There was a little more bass but not enough. Current system is almost there but not quite. I have previously tried a REL sub but found that I didn't like it! Impossible to tune to my satisfaction. Current Speakers are Sonus Faber Venere 1.5's. Speakers I have heard in the past that I liked were Sonus Faber Cremona Auditors. Think I shall seek out the S/F Sonetto II as it seems I like their 'house sound' if thats even a thing. Any other suggestions?