SUGDEN / Headphone amplifier / HA-4 Headphone Ampl.. Sugden / Phono amplifier / PA-4 Phono Amplifier Sugden / Integrated amplifier / IA-4 Integrated Am.. Sugden / Integrated amplifier / A21SE Integrated A.. Sugden / Integrated amplifier / A21 Series 2 Integ.. Sugden / Integrated amplifier / Mystro Integrated .. Sugden / Pre amplifier / LA-4 Pre-amplifier Sugden / Power amplifier / SPA-4 & MPA-4 Power Amp.. Sugden / CD player / PDT-4 Compact Disc Player Sugden / CD player / Fusion 21 CD Player Sugden / CD player / CD21 Compact Disc Player Sugden / CD player / Mystro Compact Disc Player