theo404
New Head-Fier
- Joined
- Nov 19, 2008
- Posts
- 2
- Likes
- 0
As in the title, my cmoy works magicaly with low impedance phones, such as generic philips ear buds and my modded koss plugs, but as soon as I plug my senn HD555s in it goes mad. Distorted with massive hiss at zero/low volume (set by pot) only recovers when there is signal put through it and the pot is turned up to 3/4 travel... will then also go back to loud hiss and very little music at full travel. As I said this doesnt happen with other earbud phones, it sounds sweet from zero up to max. Doesnt matter what level I have the source set to.
Have tried putting R5 (load resistor) in at 47R, no difference...
Have tried batteries, variable dc supply (current limited) and a 12V wall wart, all give the same result.
Have tried with and without input caps.... same result.
Stumpted....
Any input welcomed...
Thanks,
Theo
Have tried putting R5 (load resistor) in at 47R, no difference...
Have tried batteries, variable dc supply (current limited) and a 12V wall wart, all give the same result.
Have tried with and without input caps.... same result.
Stumpted....
Any input welcomed...
Thanks,
Theo