Nakamichi Receiver Amplifier 3 - Maintenance/Working Condition, Partially Defective The speaker relay has been replaced with a new one, and simple maintenance has been performed. There are no problems with stereo input/output. The defect is that the FM-stereo function does not work, possibly due to a malfunction in the demodulation circuit. FM reception is only in mono. There are no other operational issues, and sound output is fine. For AM reception, please connect a long lead wire or an AM loop antenna to the AM-ant terminal on the back. (Be sure to connect an antenna wire for AM/FM reception.) Please refer to the attached photos. The sound is still the Nakamichi sound, and it produces a very rich sound. This is an old product, so please be aware that there is no future warranty. No returns or refunds, please.