Have you adjusted the arm height? That can play a significant role in the bass playback.
Also, the plinths on the original Empires are pretty well a joke. They resonate quite a lot. Also, the bearings in the 980 are quite fragile and they may not be functioning as designed.
Also, the plinths on the original Empires are pretty well a joke. They resonate quite a lot. Also, the bearings in the 980 are quite fragile and they may not be functioning as designed.