i believe that the system on the site sound clips is the loud. But the clipps are poorly done. He said the queit is a little throatier and deeper than stock. The loud is much louder but it won't kill you. But as for the best times to call him, it could be anytime if you leave a Voicemail. He wont pick up the phone on Sunday but if you leave him a message, he'll call you back on Sunday if he can. if ya'll have any more querstion let me know.
