Glad the changes made your system more enjoyable. Always try speaker placement first cuz it's free! A lack of bass usually means a lack of power/drive. This can be the speaker or the amp. If you're happy now you just needed more power or an amp that could better drive your woofers. In my experience many systems are compromised by the amplifier's lack of control of the woofer. Too much bass was actually loose/slow bass that muddied the lower mids which makes the entire midrange less transparent and clear. The bass deficit was simply not getting all the woofer had to offer. Once resolved speaker placement can get you most of the way to a balance that pleases. Treat the room only when all else fails.