Unless your cables are exceptionally long (30 feet+) or skinny (larger # than 16 awg), its unlikely to give a greater quantity of bass (better quality is possible). If the Adcom is in good shape, it should have enough power for your speakers.
If bass seems completely missing have you tried checking polarity?
http://www.audiocheck.net/audiotests_polaritycheck.php
If bass seems completely missing have you tried checking polarity?
http://www.audiocheck.net/audiotests_polaritycheck.php

