In-Reply-To: <005101c7f4c7$3117a190$6501a8c0 at HypoLuxa> > I built an EFM VCF6 with unmatched 1N914 and it sounds pretty good > to me.... I built one with unmatched diodes and one with MADs and both sounded great. cheers Keith http://home.freeuk.net/lowpass