Triaxis Troubleshooting

[Mataguri]

Hi Guys! I'm having trouble with my Triaxis and I came across this forum while Googling for possible solutions, hopefully someone here might have an idea how to fix it

For some reason if I plug directly into my Triaxis I lose a lot of highs and gain, like there is excessive capacitance somewhere along my signal chain. However, if I put any buffered effects pedal between my Guitar and my Triaxis it sounds perfect.

I have tried different guitars, cables, tubes and power outlets but the problem remains. I'm absolutely stumped Someone had suggested changing the fuse (I'm not too sure how that would help) but unfortunately I don't what amperage fuse a 220v Triaxis takes (the fuse in the Triaxis doesn't have the amperage written on it). If anyone has any suggestions at all I would be extremely grateful.

[Jerry]

Is there another input on the back of the unit? If so, try plugging in there to see if that makes a difference.

[Mataguri]

Unfortunately there is only the one input. Thanks for the suggestion though

Edit: Heres an audio sample which shows my problem: http://www.box.net/shared/4c7qrt6e9h

First playthrough is Guitar -> Triaxis -> Mesa 50/50 -> 2x12 Cab -> Mic, Second playthrough is Guitar -> ISP Decimator (turned off but plugged into a 9v adapter) -> Triaxis -> Mesa 50/50 -> 2x12 Cab -> Mic. All same settings.