Nope not anymore. Back in the mid and late 70's I used them for main PA's for bands. After a while running them at or near there full rated RMS power they'd start self destructing. So they earned the reputation as Altec Self Destructs in my book. After looking into those blown drivers, it looked more like it was a thermal problem. Like heat getting built up in the gap melting the coil glue and letting the coil weld itself to the pole piece. But I've had good luck running other drivers in there cabinets and horns with no problems. The only way I'd use Altec drivers now days would be in a home stereo enviroment, nothing live.