Involved in the central benzoyl-CoA catabolism. Catalyzes the oxidation of 6-hydroxycyclohex-1-ene-1-carbonyl-CoA to 6-oxocyclohex-1-ene-1-carbonyl-CoA. It is specific to NAD and is also able to oxidize 2-hydroxycyclohexane-1-carbonyl-CoA. 6-hydroxycyclohex-1-ene-1-carbonyl-CoA + NAD(+) = 6-oxocyclohex-1-ene-1-carbonyl-CoA + H(+) + NADH Binds 2 Zn(2+) ions per subunit. One of the Zn(2+) is essential for catalytic activity while the other has a structural function. Optimum pH is 7.2-7.4. Aromatic compound metabolism; benzoyl-CoA degradation. Homodimer. Belongs to the zinc-containing alcohol dehydrogenase family.