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OLDER DECWARE GEAR SUPPORT >> CSP, CSP2, CSP2+ >> Trimming high frequencies?
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Message started by Jeffreyc on 05/03/11 at 04:47:56

Title: Trimming high frequencies?
Post by Jeffreyc on 05/03/11 at 04:47:56

Is there a technical basis for me perceiving a slight loss in high freq detail as the output pots of my Csp2+ are reduced below the two highest notches? The 3rd and 4th stops from the bottom actully give me the best volume control in my sensitive system (32db gain for amps w. 1.25v in sens.) but this setting just doesn't seem to give me as much energy up top (cymbals, chimes, etc.). If it is real it might a better alternative to maggie's tweeter resistors. Am I just imagining this bc of the temporary volume increase, and is there any disadvantage to keeping the csp2+ outputs wide open with the inputs alternatively trimmed down in my system? Still not hearing hearing sig. hum through the MMGs .

Title: Re: Trimming high frequencies?
Post by Jeffreyc on 02/24/12 at 02:38:41

After several months of evaluation, comparisons to other preamps, tube rolling, etc., I have to say that my initial impressions were most likely a placebo due to the volume increase between the last two steps.

With the right tubes and the output pots at any of the lower positions, I've been able to retrieve HF detail and dynamics equal to or better than anything else I've put into my system. This is a truly great preamp that I will be happy to live with for a long while.

Title: Re: Trimming high frequencies?
Post by Rivieraranch on 02/24/12 at 03:36:39

You are not alone.

Title: Re: Trimming high frequencies?
Post by Lon on 02/24/12 at 03:38:42

I love the flexibility of the CSP2 as well. A great tool for me in my second system.

Title: Re: Trimming high frequencies?
Post by Rivieraranch on 02/24/12 at 12:08:21

I currently have a phono signal coming in through the CSP2+ and alternately through the preamp portion of the old receiver that contains the phono preamp to the amp. The CSP2+ wins out every time.