1

AB528 Microphone preamplifier / Re: AB528 DI not working

« on: February 16, 2026, 09:37:01 PM »

They are in correctly. Maybe one of them is no good? Also I’m also now noticing when using the mic/line in the 1200 ohm position there is a constant tapping or ticking type of sound. Only on the 1200 setting. 

2

AB528 Microphone preamplifier / Re: AB528 DI not working

« on: February 13, 2026, 10:47:50 PM »

1. -15.34
2. -15.72
3. -16
4. -16

5. -14.4 but can here relay switch then 3.77
6. -14.4
7. -13.6
8. 15.8

That’s with nothing plugged into DI

3

AB528 Microphone preamplifier / AB528 DI not working

« 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!