Hi Whyland,
Yes John Bau tested every woofer and built crossover parts to each matched pair... This is still not a problem. Most manufactures,even high end manufactures match parts to plus or minus 10%. I have always done the same as John building my own product, but if you have an LCR meter and wind or unwind your coils to the inductance stated on your schematic, you should be within 2% tolerance and will yield very good results. I would replace the coils in both speakers and good air core coils can be expensive. Check Zalytron, Parts Express and Madisound, one of them will give very tight tolerences on their better coil lines.
I hope this helps,
Tim
Yes John Bau tested every woofer and built crossover parts to each matched pair... This is still not a problem. Most manufactures,even high end manufactures match parts to plus or minus 10%. I have always done the same as John building my own product, but if you have an LCR meter and wind or unwind your coils to the inductance stated on your schematic, you should be within 2% tolerance and will yield very good results. I would replace the coils in both speakers and good air core coils can be expensive. Check Zalytron, Parts Express and Madisound, one of them will give very tight tolerences on their better coil lines.
I hope this helps,
Tim