Hello, The horn driver in my Ampeg PR410-HLF starts scraping, so I am afraid it needs replacement. I used the cab mainly at medium-high levels (but without compressor) and the L-PAD at -6 dB. Questions are: * do the Ampeg horn crap out easily ? * can they be repared (diaphragm or so ?) * if they need be replaced, what horn can I buy ? * any suggestions for better or more solid (fool-proof) horn drivers? Thanks. PS: 1. the cabs sound bad without a touch of HF horns 2. are the horns the same as in my SVT-410 HLF cab ?