BSS AR-133 and Millenium DI-33 DI boxes compared (No Audio Tests!)
I was curious to see how the construction and electronic designs of these two very similar-looking active DI (Dierct Inject) boxes compared. As I state in the title, and reiterate at the beginning of the video, I do not perform any audio tests here, so it that's what you're looking for, you will have to look elsewhere. The video is 13 minutes long and is basically a slide show. I have put some chapter points below in case you have a single topic you want to home in on.
00:00 Introduction
00:53 External appearance
03:46 Mechanical assembly
05:26 Circuit boards
05:47 Connectors
06:22 Battery compartment
07:16 Inverter
07:35 Semiconductors
08:23 Audio transformers
09:04 Input attenuation
10:40 Power indicator
10:58 Earthing spring
11:23 Conclusions (and some spare slides...)