I asked on the forums recently about direct boxes, and decided to try building a couple simple circuits to try out and compare with commercial products and other DIY projects. Will it be worth the time and parts it took to build it? Let's find out!
Errata: YouTube doesn't allow annotations anymore so I can't put it in the video, but my labels of "hot" and "cold" in the schematic are backwards. This might matter to people if it is important to you to maintain a strict polarity relationship among your sources, AND you don't have a polarity switch on your preamp or board, AND you are simultaneously using a microphone and the direct box on the same source.
00:00 What is this?
00:51 A quick look inside
03:39 Circuit 1: A basic phantom-powered source follower with a transformer I had lying around
14:36 A familiar microphone circuit
24:05 Benefits of using a transformer and not for a direct box
26:45 Baseline sound: Direct to Fireface UCX instrument input
27:15 Neck and middle Fireface with pick
27:30 Neck and middle Fireface fingers
28:28 Bridge and middle Fireface pick
28:45 Transformer circuit
28:56 Bridge and middle Transformer circuit neck with pick
29:08 Bridge and middle Transformer circuit neck with pick
29:14 Neck and middle transformer circuit with fingers
29:51 Alice circuit
30:01 Neck and middle Alice with pick
30:17 Bridge and middle Alice with pick
30:29 Bridge and middle Alice fingers
30:44 What I hear and when I might use these
32:40 Would I buy or build?