Lamm LL2.1 Deluxe "DC Offset"?

Jtimothya

I am not sure why.

Perhaps, the Lamm statement itself did not really confincing about the real problem that cause when they said "But even in cases like this the voltage at the preamp’s output never exceeds 50-100 mV."

I can understand if the dealer and thier technician in doubt to change the Caps. Based on my personal observations, the question should be addressed to the power supply system. Why an abrupt small AC swing (as small as 0.3-0.5v) can generate highly fluctuated DC output? shouldn't it be a tollerance range? says +-2v before this kind of AC swing hits the circuitry and manifested into high preamp DC output?

In this case a full technical support and detail instruction from Lamm is definetly required, they are the only one that really know about the design and topology/circuitry, so that it will not drive dealer and technician to perform a trial and error repair.

Lamm gave you a diagnosis and offered to supply the parts to your dealer to address the issue. Your dealer has a Lamm qualified technician.

This situation is either very simple or there is some information missing. Seems like it is up to you and your dealer to effect the factory recommendation and it appears odd that this has not happened and equally odd that you do not know why.

Work things out with your dealer to make happen the factory suggested change. Regardless of what you think or who you think should do what, until that happens there's little else to be done. If Lamm's advice is ignored or otherwise not taken, that moves them outside the resolution loop. Speculating about a design or conjecturing about motives on an internet forum will not change things. Fwiw, the LL2.1D is an excellent preamp that yields further enjoyment with NOS tubes. Good luck.

Jtimothya,

Well, seems you missing my previous posts and did not cath-up what reflected on that.

I passed all recommendations Lamm gave to me to the dealer, verbally, face to face, by email, By phone. I've done every necessary things that should be, the way normal and educated people would do.

If the dealer and their technician, whose Lamm deeply trust very very much, then why when they took the other way the blame become in my side?

Lamm shifted the issue to the dealer, they pushed me to talk to dealer, they rejected to answer my email, they assured me that dealer and their technician will and can handle the problem.....then it is Lamm obligation to talk to the dealer and dealer to talk to Lamm.

I've spent my energy and time pushing dealer to talk to Lamm, but if they did not do that.....then why it supposed to be my fault?

Or.....may be,.....may be......,there is some kind of conspiracy between them? So that I can not talk to either dealer and Lamm, and leave me, the customer, in the frustration and solve all thing by myself

Gr-gin, I'm sorry to say this, but you chose to make this a public matter. I cannot believe that any dealer that handles an uber high-end line like Lamm would leave you hanging with a defective product. IMO, there is more to this story than we're being told. I truly hope your issues are resolved to your satisfaction.

Dear Chayro,

No worries.

My Friend teased me by offering to purchase the unit at half price of my original purchased. He may take the unit for an experiment, he jokingly said. So, worse to worse, ithis might be my last resort solution.