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Build help and troubleshooting => AB528 Microphone preamplifier => Topic started by: Ritualknive on February 06, 2026, 02:17:46 AM

Title: AB528 DI not working
Post by: Ritualknive on February 06, 2026, 02:17:46 AM

Just put together one of these. Mic and line work well along with the phantom power. DI all I hear is hiss and the front LED doesn’t work either. Any ideas? Thanks! 

Title: Re: AB528 DI not working
Post by: JPK on February 06, 2026, 10:41:04 AM

Can you report the DC voltages on each pin of U2 on the DI board?

(https://i.imgur.com/03A39JA.png)