Ampeg Portaflex PF-500 plus 2x10 cabinet A Powerful, Super-Portable Solid-State Bass Amp The Ampeg Portaflex PF500 bass head brings you 500 watts of low-end power, in an exceptionally compact and lightweight unit. It employs Ampeg's extensively developed and much lauded MOSFET solid state preamp. This gives you an amp with a super-clear clean tone, packing plenty of punch and power. الحالة مستعمل