1. I don't quite know where to post this, but this forum seems like the best bet. If it is incorrectly placed, please move it.
2. I don't know much about amplifiers, electronics, signals, impedance matching etc. so forgive me if I seem to be missing some obvious things.
With that out of the way, I currently own both a Sennheiser HD650 and a Maverick TubeMagic D1 DAC. I would like to use my headphones with the D1's tube output, but I don't have any good amplifier. The only amplifier I have is some '90s cheap marantz amp that sounds absolutely horrible, no matter what I use it with.
However, I've found that if I simply connect my headphones to the D1's tube pre-out, they are driven at an acceptable volume level, at about 60% or so volume. (I usually have the volume on 100% aka “direct mode” if connecting the D1 to an amp) I've only tested this briefly but it seems to work fine, so I'm considering soldering a dual-male RCA to female-TRS connector so I can do it permanently.
I have one worry though: Is there anything that can go wrong or damage my components by doing this? I mean, obviously sound is at an acceptable level, and it works - but that doesn't tell anything about how long.
I checked Maverick's web-site and they've listed the D1's tube output impedance as “5 kOhm”, though my headphones have an input impedance of “300 Ohms” only. What does this mean and can it damage my DAC (by, for example, forcing it to draw more current than it's design to handle)?
If so, is there any alternative I could use? I've always been using the D1's integrated headphone amp for my headphones (I also use speakers), but I've really wanted to do some critical listening of the tube as well so I can decide whether I prefer the tube or the solid state, but I don't have a high quality amplifier and I don't want to waste lots of money on something if I end up not using it.