Well I would agree the W5000's do not have the weight and body of other headphones I tried and surely the HA5000 does not correct this, but what it does do is it accentuates that strengths of the W5000's which are detail, resolution and air that are already the hallmarks of this headphone. I have compared many amps in my experience, and looking around here on Head-Fi almost no amps match like the HA5000, but I am not sure what amps you are using, but I would be curious to know. Everyone has different ears but expecting the W5000's powered by the HA5000 to turn into a bass heavy, lush and full sounding headphone is impossible and in my opinion would take away from the special qualities the W5000's do possess. Anyway back to this amazing headphone meet!