popping noise

For a number of years I have been using a Rega P6 turntable with an Ortofon 2M Bronze cartridge very successfully with my Eros 2 and my Bottlehead system, comprised of a BeePre 2, Kaiju, and Jager speakers. I just recently upgraded the P6 to a Rega P8 with the new ND7 moving magnet cartridge...