【Overview】 ・This item is a repaired and restored piece of junk from approximately 50 years ago. While all functions have been confirmed to operate normally, it is being sold as a junk item due to its age. Occasionally, there are individuals who make claims unrelated to basic functionality and demand returns. We kindly request that only those who appreciate the value of a retro, repaired item purchase this product. 【Product Description】 Product: Integrated Amplifier Manufacturer: SONY Model Number: TA-1630 Release Date: Around 1976 Price: 29,800 yen 【Appearance】 ・The front panel and chassis are very clean and free of rust. There are no dents, and overall, considering the item is approximately 50 years old, it is in good condition. 【Repairs and Adjustments】 ・Disassembly and cleaning of the preamplifier board and power amplifier board ・General inspection of the main amplifier circuit ・Repair of the PHONO equalizer amplifier circuit ・Adjustment of the final stage power transistors and DC idling current ・Cleaning of function keys, volume controls, etc. 【Operational Check】 ・Despite being a standard entry-level model at the time, the main amplifier section features a full-fledged design with a discrete configuration and a complementary push-pull system using positive and negative power supplies. ・All functions, including the PHONO equalizer amplifier, are operating normally. 【Sound Quality Check】 ・Noise and distortion are low enough to be imperceptible, and I feel it produces very good sound for an amplifier from approximately 50 years ago. 【Accessories】 ・None 【Reference】 https://audio-heritage.jp/SONY-ESPRIT/amp/ta-1630.html