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Purchased the Zhaolu D2.5C and, after some easy op amp rolling, I plan to perform this more challenging mod recommended by Ori, but fear DC Offset issues as mentioned:
"The second mod you might consider is the famous "cap bypass mod". You should understand that it increases the DC offset on the RCA outputs. I measured 50-60 mV and in some extreme cases you might see over 100 mV. If your amp has a capacitor at the input, then this is not an issue. Most tubes amps do. You may want to use a multimeter to check the DC offset at the RCA output after the mod, just to verify it's within the reasonable limits. The procedure is quite simple: red probe to inner part ("tip") of the RCA jack and black probe to the outer part ("barrel"). Turn on the unit when measuring but you don't need a source or an amp."
So...I'm ready to perform this mod but I can't get definitive info from NAD on whether my NAD 304 Integrated (Used as Preamp) is DC Coupled or what my B&K ST125.5 amp can handle, although B&K confirmed the amp is not DC Coupled. I'm still learning about specs and I'm not yet up to speed on this. Does anyone have the patience to open (or repaste) below user manual links showing equipment specs and make a reasonable inference or recommendatation regarding the safety of increased DC Offset in my set-up?
See page 2 for NAD specs:
http://207.228.230.231/info/NAD_304.pdf
See page 13 for B&K specs:
http://www.bkcomp.com/fileadmin/content/content_products/manuals/Past/Amp/ST_125_3_2_1_manual.pdf
Thanks, Audiohound
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