EMM CDSA can be used without preamp?

you should NOT connect the CDSA directly to your amplifier. the CDSA has no volume control function and will likely drive your amp to clipping. you will have no control over the volume whatsoever. here is the manual for the CDSA:

http://www.emmlabs.com/pdf/manuals/CDSA_Manual_1v0.pdf

Sorry. Why can't I read properly?

I somehow read this as "can I use it with a preamp". Duh! Obviously the coffee was not strong enough this morning. Anyway, other more observant posters have given the correct advice.

Regards,

Thanks to all, Metralla don´t worry.

This might help - will work with single source system

Here is another option

and this one for $300.

Just a few to choose from.
Got the picture?

Cheers
Mariusz

And the best ones of all ...

http://www.tweakaudio.com/Ultimate%20Attenuators.html

Regards,