Thanks everyone for all your feedback. Since I use this "tool" (CH L1 X1) for a different purpose, I just thought it would be thoughtful to share my experience. Please keep in mind I always compare what I do threw that line stage , to many other client's reference system. I was told about spectral from a dear friend of mine that is part owner of Berkeley Audio Labs. Here is the problem with almost every other preamp available in the world. They all have too much gain. Some 8 db some 18 db. If your feeding a +4 DBM nominal signal into a preamp, (most balanced DAC outputs) and the preamp has gain built in, it will fundamentally reduce headroom and resolution.
As you can see the better I can reference truly the resolution of the source, the better I can adjust my compressors for a translatable mix/product .
In Hi Fi the ultimate goal should be a system that entertains you. For me I need accuracy, so my clients hear the same thing I hear.
PS The Spectral preamp has set gain I believe of 10 or 18 DB . The CH precision is the only preamp I know of that enables you to disconnect the +18 db gain stage, thus making it 0db in 0db out with volume control all the way up!
If ANYONE knows of a active line stage ( not passive) with NO additional gain built in please share. I am always open minded

