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Lamm LL2.1 Deluxe "DC Offset"?

Hi there,

Is there anybody who has a deep experiences with high fluctuated "DC offset" in Lamm LL2.1 Deluxe PreAmp?.

My Lamm LL2.1 Deluxe Preamp shows a highly fluctuated DC reading that reaching +-200mV even more. Last night measurement showed a flucuated reading and reached +-300mV.

A three weeks continuous observation shows that the preamp DC fluctuation seems higly affected by the swing/fluctuation of AC Volatage,day time and night time. I can see that even as small as 0.3V AC voltage abrupt swing will directly generate significant DC offset in the LL2.1.

Your sharing experience and advices are higly appreciated.
gr-gin

Showing 5 responses by charles1dad

charles1dad's avatar
charles1dad
10,250 posts
 
Vladimir himself should take this unit back!One of the following should be done.
Repair it properly.
Replace it with a new unit
Refund your money in full.
This is a high cost component purchased new with a warranty. Something isn`t right with the Manfactuer`s response.
charles1dad's avatar
charles1dad
10,250 posts
 
Lamm suggested that it could be a leaking capacitor. I'd accept the offer to have your dealer install them and see if this solves the problem.
Regards,
charles1dad's avatar
charles1dad
10,250 posts
 
Gr-gin,
Well,it appears that the Lamm has this inherent design issue and will require a more compatible power amplifier. Or keep your amplifier and sell the Lamm, as there's no repair for this situation(design choice).
charles1dad's avatar
charles1dad
10,250 posts
 
Whart,
I can appreciate your positive experience with Lamm products. Doesn't it seem in this particular case Gr-gin's concerns are being brushed off to some degree given the time that's elapsed?
Regards,
charles1dad's avatar
charles1dad
10,250 posts
 
Whart,
After 3 months of frustration for Gr-gin I second your recommendation, ship it to Mr. Lamm.
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