Actually, the greater threat would be continuing with the same audit firm for a long time. A fresh auditor is always good because they work hard at the beginning of the audit engagement in the early years. The best strategy, for Koss, would be to change audit firms in say 5 years. This would ensure the auditors don't fall into the same audit traps the prior firm did. Koss is a great opportunity at its current pricing. Koss only real threat isn't scandal, but skullcandy (lol).
Baker-Tilly is amongst the top 20. Are you suggesting a top 5 firm would be more reputable? Someone like Arthur Anderson. Oh wait, they surrendered their license to practice as CPA's after being found guilty of criminal charges in connection with Enron.