A positive review on the AH-NC732 is found at:
"Excellent sound quality, iPhone friendly jacks, Headphones work without noise canceling feature turned on."
A brief excerpt from his conclusion:
"I compared the Denon AH-NC732's to other noise canceling sets, and it stands up very well to the competition. [...] Save $50 and buy your noise canceling headphones from a company (Denon) that understands true high-fidelity."