Hertz hsk 165
I wouldn't buy a high end product unless it had verified serial numbers on them. I conversed with the guy on eBay who is selling them less the sn's. I didn't buy them from him but so far they seem legit. If you search around on diymobileaudio, a name will pop up that helps us guys get access to Hertz where locally not available. They are a tad more expensive, but come sealed up with sn's.



