Cambridge - Azur 651P MM/MC Preamp (Silver) by Cambridge Audio Multi-parallel capacitors to achieve exceptional RIAA accuracy of only 0.3dB up to 50kHz. Phono pre-amplifier with moving magnet (MM) and moving coil (MC) input stages. ECO-Friendly Improved Power Supply Single ended "Class A" gain stages with discreet transistors Defeatable subsonic filter to eliminate very low frequency 'rumble', caused by vinyl imperfections.