All downloads grouped together

ZIPfiles filters.zip : all data about the electronic filters, including the calculation spreadsheet luchen.zip : all the simulation spreadsheets in one ZIP-file pcb.zip  : the PCB-design files for the PCB-drawing program of Waldherr Marantz-Sony.zip : PC-measurements on Sony CDP-390 and Marantz CD-63 MkII KI CD-players done with CoolEdit measfilt.zip : two channel measurement filter including schematic, specifications, filter calculations and PCB Excel97 files 2xhpf-2nd-order.xls  : HPF response calculation 2 x Sallen-Key in series 4x4th-linkwitz-riley.xls : 4-way 4th order electronic crossover calculator 4x4th-lr-auto.xls  : 4-way 4th order electronic crossover calculator automatic version : input frequencies and Q's allpass-butterworth.xls  : subtractive filter simulator linkxfrm.xls  : Linkwitz transform calculator (John Murphy) with response calculation added by me. RIAA-amp.xls : RIAA-preamplifier calculator passive-2nd-order.xls : Passive second order LPF spreadsheet series-filter.xls : Series crossover filter spreadsheet binomial.zip : 24 driver array radiation pattern spreadsheet Comparison CD versus LP or mp3 CD-LP.jpg : Spectral view of the second track of Queen Greatest Hits : pink track is the CD version, blue track is the LP version. In the LP version you see the 50 Hz dip, because I filtered out the mains hum from my LP-player. CD-MP3.jpg : The same but now CD versus mp3 : blue = CD, pink = mp3 Remark : to download the Excel files it may help if you right click the link and select "Save target as ...". Some browsers have a problem downloading Excel files from within the normal browser window with a left-click.