The only alternative IME is a very large room to avoid bass nodes.
- Quality matters - In life and in audio, in most instances you pay for what you get. Quality speakers and subwoofers matter. You'll be starting off 1 foot in a hole if you purchase less than highly reputable speakers / subwoofers and won't ever achieve very good bass.
- Room treatments, room size and room dimensions matter. IME, I've never heard tuneful, tight articulate bass in a small room at moderate or higher levels.
- Don't underestimate the importance of speaker and subwoofer placement. Measurement equipment and your ears will go along way coupled with time and patience.
- If all above is employed well, DEQ applied sparingly can be your friend. Even the biggest and best rooms with the finest speakers and subs placed strategically in a room can't beat physics. And in many cases DEQ to tame peaks can reduce low frequency reverberations and will go a long way.