QSC ISA500Ti เครื่องขยายเสียง 2 แชนแนล 260 วัตต์ The QSC ISA500Ti is a 3RU rackmount power amplifier, equipped with an internal 70V transformer and designed specifically for sound contractors as a low impedance solution rated for 2-ohm operation at 700W per side, or 260W per Channel at 8 ohms.