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. 
arcticdeth

Showing 9 responses by lowrider57

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?


George, of course you're right, it's not an impedance mismatch...I'm terrible at math.
 
The only way to know if there's an output coupling cap is to call the company since this preamp was designed to mate with the Sanders amp.
George,
Yes, the amp's input impedance is extremely low at 10kohm, and is not a good match for this preamp. But the preamp's output impedance is very low, so an amp with an input impedance lower than 47kohm can be used for testing, correct?

If he can borrow an amp with an input impedance of >25kohm approx., it should be adequate for testing. Your thoughts?
George,
From a design perspective, why does the McCormack have such a low input impedance?
Hi George, I have a EE design question.
When no output coupling cap is used, can't DC be outputted into the SS amp? In tube to tube, this isn't a problem, but what about DC transients from a tube pre entering a SS amp when the design of the amp's input stage is unknown?

In our case here, we don't know if the amp is DC coupled. Is it standard to use a capacitor to block DC in modern SS amps?
I have a thought, the Groneberg Quattro ref ICs may have more low-end extension than your current cables. But let them burn-in before making judgement.
 IME, installing Cardas Clear Light from my pre to amp added deeper bass and more weight to the sound.

You can also contact The Cable Company to find a low capacitance IC that has good low-end specs.