New preamp, loss of low freq.?


Hooked up new preamp, and I lost what I think is some low freq slam. Reasoning behind this?
i have been rewarded with the best cleanest, accurate midrange/highs I have ever heard, but did lose some low frequencies.      Normal?  

Sanders preamplifier is the new addition. 

Should i I hook up my equalizer to  smooth out, and add some low freq. 

it it is recording dependent, I still feel I lost some bass when sanders is in the mix. 

Not complaining, this has completely opened up my energy rc-70's, I have never heard these sound so loud, so clear before.   It's I feel I lost a few octaves in the lower register. 

Better? Leave it, I can definitely get used to this sound, as before it was a small bit boomy, maybe I just need time to adjust, and to let the pre warm up for a couple weeks. 

thoughts, recommendations, tweaks? I suppose I could move the speakers a little closer to the wall, this may add a little more bass. 
128x128arctikdeth
If the preamp is brand new I would give it some time to break in, about 150 hours, before you make any determination.
Of course, listen to atmasphere and give it some time. But, what amp are you using and are you going balanced or single-ended?


Conrad Johnson / McCormack DNA-750 monoblocks.  Are the amps I use.  I don't think the sanders has enough output volts to fully drive them???  Not sure

unbalanced rca. Buying new rca's in week or two. Groneberg Quattro ref with wbt connectors
Volume to 99 digital, I don't get volume until I reach almost 50 , from 50-99 is my range. I can set pre to add additional 18db gain,. 

Great pre, won't be changing for long time

If the preamp is designed right, then there can be one reason for the loss of bass. If the preamp has an output coupling cap and it is not big enough (in uf) if it sees a low impedance input of the next component.

 So the question is what is the input impedance of the next component after the preamp (EG: amp or xover etc.)


Cheers George   

Amps input imped is 10 kOhms

preamp: output 50 Ohm
input imped 47 KOhms

max output 10 volts

b&k output is I think 17 or 21. Pro 10 mc

onkyo p-308 not sure