Maintained! This is Sony's entry-class premain amplifier. It uses the same traditional G chassis as the advanced grade 555, and is one with high cost performance. Although the overall sound quality is tight, there are few quirks, and it is recommended for those starting out with audio. There is dullness and dirt over time (Sasaki Shota)
Maintenance information: 2025.10.13 maintained (PHONO input RCA terminal rattles on the negative side and cannot be disassembled and repaired, etc., replacement RCA jack left and right, REC switch disassembly contact polishing grease application, DC bias DC balance check)
2021.6.15 Maintained (volume VR replaced with a custom-made product with sound, speaker relay poor contact replacement, output circuit resistance deterioration 220Ω replacement, other Cartrich mode SW, direct INPUT, source direct SW, MUTING SW disassembly contact cleaning, other DC bias DC balance check adjustment, input/output connection sound confirmation)
Accessories: manual, power cable
Main specifications: 90W+90W (8Ω) PHONO (MM/MC) W430 × H150 × D375 mm 14.0 kg