My speakers, both pair are in the 30 range of serial numbers as well as many others who still to this day don't have an issue. Meaning the last 4 digits of the serial numbers were in the 5000 range. So to further that investigation I started asking folks who were having issues to give me the serial numbers on the speakers and what I discovered was roughly 99% of those were in the 5000 range of serial numbers. So I finally get my hands on a pair of these speakers and after tearing apart the woofer cone, I see what appears to be nothing more than bad glue on the stalks and the stalks seperating from the base where attached. Some were pointed up, some down, some to the side, etc. Some of the tweeter stalks I was seeing were angled as if melted, and no a lot of them were not angled in respect to the position of the speaker install. Well after digging into it a little more what I was finding was tweeter stalks that were seperating and resulting in speakers getting so hot that the woofer cone would either seize or work sporadically. However about March or so of this year (2013) all of a sudden I start seeing folks that have just purchased and installed their systems complaining about blowing speakers.
HD specific audio costs were absolutely through the roof with nothing but crappy speakers, etc. The initial folks who followed my lead some 1+ years ago with the above mentioned SS amp and MM651 speakers combo were very happy with the outcome, again as I expected them to be compared to anything else on the market within a reasonable price point. So being a member of an HD forum I started bragging about the sound quality of this setup and everyone bit as I would have expected some to do. So for 2+ years now I've been running the same MM651 speakers with initially an Alpine KTP445 amp and then onto the Soundstream PN4.520D amp.
Couple that with a decent amp and you had one hell of a system that couldn't be compared to for under $500. They fit, albeit I didn't like the wagon wheel grills for the rear pods but that was easily remedied. Fast forward 20 years.Ībout 2 years ago is when I first stumbled upon the MM651 speakers specifically to put on a Harley in the batwing fairing and rear tour pak pods.
#SOUNDSTREAM PN4 520D PROFESSIONAL#
I've been a fan of Polk Audio many a years dating back to my professional and multi trophy (most SQ but some SPL also) winning installation career. Not the UM versions, just the MM version. Simply to find a solution to the issues that TONS of people are having with the specific Polk MM651 speakers. Ok here goes my 2nd post and let me clarify why I signed up here in the first place.
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