Einstein The Tube users...help


Hi, I am auditioning this great preamp. The sound is incredible! However, I am having serious issues with the gain. Even with the volume turned all the way to 0, I can hear music playing through my speakers. When I increase the volume knob just a tiny bit, the volume is VERY loud. This problem is present on all the inputs. I have tried different sources as well with the same result. This problem is making the preamp unusable for me which is a shame because it does sound GREAT. Any help would be greatly appreciated.
tboooe

Showing 6 responses by boa2

What Newbee means to say is the input sensitivity to your amps is too LOW for your Einstein. Pass would likely suggest that it's just perfect for their preamps, and they would be correct in saying so. The answer is to either buy/make a fixed or stepped attenuator to place between your preamp & amp, or if you are to keep the Einstein, have ITS gain lowered. That is an amazing preamp, one I would certainly keep, and your issue is easily remedied.
Thanks Boa2, In self defense, for the anal folks like me, I feel it necessary to editoralize on the issue of input sensitivity numbers and their actual meaning in practice
No worries. It was obvious you knew exactly what the issue was, and if I wasn't such an "Ernie Einstein", I'd have let it Pass. Boy, I crack myself up! In truth, if not for having had this issue with several components, how it works would still confound me.

Tbooe, in response to your other thread, my suggestion would be to keep the Einstein, and have its gain reduced. It's an incredible preamp, IMO. The issue you're having is simple to fix, and worth the minimal effort. What you will notice when you have the gain correctly matched is a tremendous improvement in the highs, and an overall richening of the music.

If you like, I can send you some cheapie fixed attenuators to use until you get this resolved. Email me privately if you like.
I would have to use fixed attenuators. Does this affect the sound quality at all?
Anything you add to the chain will affect the sound to some degree. However, having recently been in the same predicament, I found that using the stop-gap attenuators that I have affected the sound quality in a positive way, primarily because I was able to raise the volume on the preamp and involve it more in the overall sound. Making fixed attenuators with Eichmann bullets (or the like) is apparently not that hard. Some people like the Rothwells . I've not tried them. Purist and other companies who make adaptors may also make such an item, I'm not certain. The most important part thing is you would want good quality connectors. Again, if you want to try the ones I have, just send me an email with your address.

When I inquired with Lamm about the same issue, they said they could reduce the gain on the preamp for $85. Pretty cheap, huh? Does Einstein have a US service center? Adding a resistor to reduce your gain is an easy job for a good tech, and hopefully won't require you sending the unit to Germany.
all is needed here is a preamp with fine volume steps
The issue is one of overall gain, not fine adjustment. As Tboooe states:
When I increase the volume knob just a tiny bit, the volume is VERY loud.
An attenuator is a non-intrusive fix for the problem, one that will still permit the signature of the Einstein to be heard. Having the gain reduced on the Einstein is an even purer solution, especially if you intend to keep it. Based upon your other thread, it sounds like you may be giving up on the Einstein due to the gain issue. If that is the case, you will have never heard what this preamp can do.

Just my two cents, before I drink myself silly tonight...on hot tea.
As for my amps, they have 26db gain and an input impedance 22K0hm.
From the PS Audio website:
"No tube preamp should be asked to drive an input impedance of less than 30K..."

Take it for what it's worth, but I've just gone through the same thing as you are. We all know tube preamps can work with SS amps, and yet yours is in need of a gain reduction, simple as that. If you try out other preamps that do not have gain adjustability, you are likely to encounter the same issue. Thankfully, it's an easy fix.
Audphile1, excuse me if my posts sounded argumentative. I didn't intend them to be. Mainly, I was concerned that Tboooe might give up on a stellar preamp before hearing it at its best, and admittedly, I've not resolved this issue in the manner you have suggested. Clearly, it will work.