I have a Powerhead model. Have been running it through an old Lopoline 1X12 cab I've had for years loaded with a 16 ohm 100W Weber Vintage 12F, worked pretty good but not too hot with the cabs so usually have them off. So, I ordered a Beyma 12GA50 and it arrived yesterday, I swapped out the Weber, put in the Beyma, hooked everything up, called up the Ford Boost profile (one of my current faves) and... buzz city. I always start low on a speaker and turn it up, so I started at about 2 or so LEDs on the collar,nbot too bad, but at 3 LEDs, wow! The low notes in particular buzzed very loudly, especially on the low note decay. Hm. Tried closed back, open back (which was marginally better), removed and reinstalled it, still all abuzz. It is definitely the speaker, not the cab or mounting screws, I damped them with my fingers and it still buzzed. - if I gently touch the outer surface of the outer cone whilst it buzzes it damps the buzz. So, I suspect either a faulty unit or damaged somehow in transit. I examined it closely under a bright light and cannot see any obvious external defects. Anybody else experience this? I have notified the seller (US Speaker) and hopefully he will allow me to swap it for another one and see if it does the same thing.
In the meantime I have a gig coming up this weekend at a big party, first gig with the Kemper, and was planning to use my speaker cab with the Beyma driven by the Powerhead output with the cabs turned on in the KPA, and run the KPA Monitor output to our PA. Now need to use the Weber speaker, rather than the Beyma. There are not enough spare channels to allow me to use the main outputs, only have one spare input to the PA, so need to use the monitor output from the KPA. Is there anyway to turn off the cabs for the Powerhead speaker output and still leave them on for the monitor out? I looked through the manuals and didn't spot anything, anyone know if you can? I can live with the cabs turned on to the speaker can, just sounds a bit odd, can probably tweak them to get a good compromise out of both the cab and the PA, but not much time to do them all at a gig. But if there is no way I will have to live with it. Thanks for the input!