The 4 dip switches modify sonics of the preamplifier's line stage. Once the preamp has been broken in we recommend that they be switched to the OFF position. Regards, Jerry/AI
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Pepericoz, We mfg.the L1 from 1994-2003 and made no updates to the design during this period. However, the 5mF/300v polypropelyne caps could be updated to newer versions. Also, replace two of the four HVB+ 100mf/400v, radial-lead,Panasonic electrolytic caps with Panasonic 220mf/400v caps. (The first two caps closest to the front. Not the 3rd & fourth caps with the bypasses). This will improve the preamps dynamics. However I suggest you have this work done by a competant technician. Regards, Jerry
Thanks for all the suggestions, can these caps be purchased thru AI? if it can, what caps (brands)do you offer for the 5mF/300V polypropelyne? thanks again
PS; by the way i have applied soundcoat damping sheet thru out internal chassis also top and bottom cover ( ofcourse not blocking ventilation hole ) and have experienced better detail and tighter bass, what do you think?