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Aaron Hoyle

Question about tweeters on VR30

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Hi there, this question is directed to Steve F but anyone with knowledge on the subject is certainly welcome to give input.  I have a pair of VR30's that both have blown tweeters.. after carefully disassembling the tweeters I have found that both of the tweeters had the lead separate from the end of the voice coil in the same place (at the solder joint) but I have been unable to solder the two together without leaving a glob of solder larger than the voice coil gap.  Perhaps someday I'll be able to get them repaired or find a pair for a reasonable price used, for the time being I have an extra pair of tweeters from a pair of CR9's that I purchased from Ebay that I obtained for a reasonable price (Lynnfield tweeters come up very rarely).

My question is what the consequences will be if I install the CR9 Kortec tweeter in the VR30 cabinet, particularly if the crossover is set lower in frequency on the VR30 for the Kortec tweeter to handle (or smoothly respond at), if the Kortec sensitivity is different than that of the Lynnfield tweeter and finally if there would be any advantage of swapping the front plates with the AMD ducts on to the Kortec tweeters (they have the same front plate dimensions).  I assume the AMD ducts are tuned specifically for the aluminum Lynnfield tweeter, but thought it was worth asking just in case.  

On another subject, I have a pair of CR8's that I have modified by adding mass loaded epoxy to the corrugated plastic rear panels, added a tensioned brace between the side panels in the lower 2/3rd behind the woofer, lined the walls with high density acoustic eggcrate foam, replaced the 1uf electrolytic cap with a precision steel sealed paper in oil Tektronix caps and bypassed the other electrolytic caps with Sprague film/foil caps and they sound absolutely FANTASTIC.  If anyone is interested I'll be happy to post pictures of the modifications.  

Thanks for your time!  

Aaron

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I always like to see other people's mod pics, post em. I just got had to replace my tweeters. Good luck getting your tweeters sorted out.

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The Kortec tweeter should work well in the VR30. There would be no reason to use the AMD on the Kortec, since, as you surmised, it is strictly for removing the resonances of a metal dome.

In all the time I was at BA (1992-2003) we never had to replace a single VR tweeter due to burnout. Not one. Ever, from the time of the VR's introduction (fall 1994) until I left in March 2003. Not a single tweeter. VR20, 30, 40, VR950, 960, 970, 965, 975, VR12, 10, VR910, 920, VR-M50, 60, 80, 90, VR-MC, VR surrounds, MR90 sats, MR90 Center, probably a few models I'm forgetting. Not one tweeter. Ever.

You (or the previous owner) must have driven the ever-lovin' cr*p out of these things. That tweeter was both bullet-proof and ruler-flat from 2kHz to 20kHz. It put every tweeter from every company I was at to total shame.

Steve F.

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It was the prior owner.  I was given the VR30's due to him not finding replacement tweeters after I discovered them blown when he hired me to set up a new preamp/amp combo in his new house.  Along the VR30's, he had a VR12 that also had a blown tweeter.  I am also at a loss as to how he managed to blown them.. when I asked about his listening habits and prior setup he said "loud, I had a Yamaha amp driving them" and was all the information he could provide.

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