Hi everyone. I recently acquired a pair of Allen HC12 cabinets that I hope to use on a Hauptwerk setup. But I have a couple of questions about them.
First, what range of output power should I look for, in order to drive them properly? As a first-run test setup, I had them on 40W each from an old SS amp I had lying around. This worked OK but seemed like less volume than I would expect. (Setup was as follows: HW > laptop onboard sound > stereo out > mixer > old amp > HC12s.)
Second, what's going on with the phasing in these cabs?!? I had to replace the surrounds on the Peerless midrange drivers, and when I hooked them back up I realized they were wired out-of-phase from the factory: i.e., signal going into negative terminal, positive terminal to ground. Then, on the back there's a sticker with a note: "On ADC organs, HC-12s are to be in reverse phase." Does anyone know why this is so? Also, given this unusual phasing situation, in my application should I wire them up "straight," or reverse-phased as if I were driving them with an ADC Allen?
As a matter of interest, these are dated from 1986, and have the original Eminence 15" woofers in them... but with tensile/accordion surrounds, not foam. They look original too, not like re-foam (er, "re-surround") jobs. I had always thought all HC12s had foam surrounds; but then Googling around I found a few comments to the effect that Allen may have switched to a cloth surround at some point, once they realized the foam surrounds were subject to problems. Would be interesting to hear if others have encountered apparently original accordion surrounds on these. I can snap a pic or two of the woofers if anyone is curious.
First, what range of output power should I look for, in order to drive them properly? As a first-run test setup, I had them on 40W each from an old SS amp I had lying around. This worked OK but seemed like less volume than I would expect. (Setup was as follows: HW > laptop onboard sound > stereo out > mixer > old amp > HC12s.)
Second, what's going on with the phasing in these cabs?!? I had to replace the surrounds on the Peerless midrange drivers, and when I hooked them back up I realized they were wired out-of-phase from the factory: i.e., signal going into negative terminal, positive terminal to ground. Then, on the back there's a sticker with a note: "On ADC organs, HC-12s are to be in reverse phase." Does anyone know why this is so? Also, given this unusual phasing situation, in my application should I wire them up "straight," or reverse-phased as if I were driving them with an ADC Allen?
As a matter of interest, these are dated from 1986, and have the original Eminence 15" woofers in them... but with tensile/accordion surrounds, not foam. They look original too, not like re-foam (er, "re-surround") jobs. I had always thought all HC12s had foam surrounds; but then Googling around I found a few comments to the effect that Allen may have switched to a cloth surround at some point, once they realized the foam surrounds were subject to problems. Would be interesting to hear if others have encountered apparently original accordion surrounds on these. I can snap a pic or two of the woofers if anyone is curious.
Comment