[Florian]

Hello fellow members !!

I recently purchased a UnicoCD and did notice some unpleasant changes. On highy powerfull recorded music it seems to overdrive the input of the Pathos. My Sphinx Project 2 MKII Preamp comes back on monday or tuesday and i would like to know what i can do to reduce this problem. The problem does not happen with my Rega Planet 2000. My friend told me this

the Unison might have a higher gain, which overdrives the input stage of the power amp

He suggested a passive-preamp in case it wont work with the Sphinx. Are there any other options out there exept buying a new CD-Player? How can i build a passive preamp or how can i lower the output of the Unison?

Thanks

Flo

[mgalusha]

Florian,

It may not be a problem once you get your preamp back. In almost all preamps the volume control is the first thing in the circuit, and will attenuate the level to prevent it from overloading the input stage. There are some preamps that put the attenuator after the input stage, but they are few and far between. If the Unico output is really high, then the preamp volume might be too sensitive but it should be able to attenuate the level without difficulty.

If all else fails, you can build an L-Pad with a few resistors. If you don't know how to calculate the values, there are plenty of them on the web. The first one that comes up on a Google search is here: http://www.lalena.com/audio/calculator/lpad/ This is designed for loudspeakers but it's entirely applicable to attenuating the level before your preamp. Just enter the preamp input impedance in the Z field and something like 6 in the attenuation desired and it will calculate the resistors you need.

mike

[Florian]

Thanks alot. I hope the Sphinx wont care about the signal too much and get finally done with my system    If all else fails i'll try to build a L-Pad.

Thanks again

Florian

[crossroadazn]

May be this is what you need:
http://cls.audiogon.com/cgi-bin/cls.pl?accstwek&1127047033