[scompton]

I came into work today and these were sitting on my desk. I've got a couple of questions if anyone knows anything about these

• The TK44 didn't come with any instructions. Does anyone know the correct setup of the 4 wires? They're red, black, white and blue.
• Even though the TK44 has a TRS jack, I assume I'll destroy any headphones I plug into it other than the electrets
• Since the AT-706 has a TRS plug, does anyone know if they can be played out of anything other than the TK44? I assume no, because I got no sound out of my XM4.

 

[scompton]

Anyone have any knowledge of these?

 

[ericj]

i really thought that someone who has first-hand experience with this kit would respond.

iirc the AT-706 has transformers in the earcups, right? That would mean that the TK44 box is relatively light-weight. If that's the case, my guess is that the 'phones can be plugged into any TRS jack and just need an above-average jack to sound at all good. Also that the TK44 is probably safe for most headphones granted that you are very careful with the volume knob.

 

[scompton]

The transformers are in the TK44. It weighs at least a pound, if not more and the headphones are very light and small. I guess not too many people have first hand experience with these. The only posts I saw mentioning them were a bit old. Maybe I can post pics later.

 

[scompton]

Just got my Mangnavox 1A9217. The transformer box has the same color wires and instructions on the box. I'll assume that they hook up the same.

 

[spritzer]

The AT-706 must use single ended electrets with a share ground connection so I wouldn't plug any other headphone into that socket.

 

[scompton]

That's kind of what I figured. I wasn't planning on it unless someone has first hand experience with it, or I had some bad headphones I don't care about destroying.

 

[psych_major]

white = left channel positive
blue = left channel negative
red = right channel positive
black = right channel negative

The ear phones should have a DIN type connector to interface with the transformer. I have never seen these with TRS plugs as originally equipped.