User Manuals Click a link below to view. ARCHEL AMPLIFIER SERIES Archel Pro Headphone Amplifier Archel 2 Pro Headphone Amplifier Archel 2 Pro GMR Headphone Amplifier Archel 2.5 Pro Headphone Amplifier Archel 2.5X/XL Headphone Amplifier ENOG DAC SERIES ENOG Pro DAC ENOG 2 Pro DAC ERISH BALANCED AMPLIFIER SERIES Erish Balanced Amplifier Erish 2 Balanced Amplifier JNOG DAC SERIES JNOG DAC JNOG 2 DAC