Recently I had a pair of Sunn Magna 15s reconed. It's the first time I have done this with any drivers. The guy that did them has a good track record been around a long time even reconed for a local well known Audio touring co. he now works out of his garage. After about a month I picked them up price was right, looked good but it's all about the sound. Couple things tipped me a bit: the fact that when I got there he had just finished gluing the dust caps on after having them so long and his work area is a mess. So last nite I mounted them in my Sunn 215BH cab anticipating healthy tone. Well they work BUT each driver is buzzing. I ck'ed it with 2 different heads no distortion, clean signal Good cords active switch on and off. Definitely not the heads as they ck out fine with other cabs, very clean. My Jazz Basses are in Exc Cond and only one of them has active circuitry. Low volume , Medium volume, I didn't crank them up, normally I don't play very loud. The initial attack on any string sounds good then after a sec the buzz appears and only dies away when the string decays. Drivers are mounted with T-nut and machine screws they are tight and using a thin gasket between them and the wood. Cabinet though ancient is in Exc Cond and solid. One amp has an 8 ohm output but I am not cranking the volume or gain I don't think this would cause buzz The other is 4 ohms which is the rated impedance of 2 drivers when wired parallel, which they are in this cab. Each cone when moved by hand feels fine, no rubbing that i can detect. The buzz is not vibration within the cab or elseware It comes directly out of the speaker on axis. Is this a lousy recone job ?