I bought this along with an ENGL Cabloader to use with my ENGL E570 preamp. E570's built-in speaker emulation is pretty outdated as you can imagine.
So Cabloader was definitely an excellent choice. However, a couple of days later, either Cabloader or this adapter stopped working. I wasn't able to troubleshoot the issue as I didn't have any spare adapters.
I had to return both items and Thomann sent me new ones immediately. (Thomann rocks!)
This time everything has worked so far, no problem. However, I noticed the adapter was generating a hissing, almost like a sine-wave sound when plugged in. This sound comes from the adapter itself, not from any sound source.
Also, there is a lot of noise generated when used within the system I mentioned.
I must say, I have fallen for the user reviews with high scores.
For this reason, I'm giving this item 3-stars. I wouldn't recommend this adapter personally.
I have already ordered a Voodoo Lab Pedal Power X4 instead and will definitely publish an article with proof of my claims about Trutone and do a comparison.
Once again, it's been proved that you should invest some decent amount of cash for these kinds of equipment.