This is Signet MC boost transformer MK10T. This is an overseas model of Audio-Technica's MC boost transformer AT-630. Although compact, it is a high-performance model that reduces induction noise with a triple permalloy shield and eliminates signal deterioration due to input impedance switching, and is compatible with the company's AT32 series and AT33 series. The exterior is dull, there is slight corrosion, etc. (Ryo Mizusaki)
Maintenance information: 2026.5.13 sound output confirmed
Accessories: none
Main specifications: input impedance 18 ohms load impedance 47 kΩ frequency characteristics 15 to 100,000 Hz weight 230 g