I have absolutely no experience designing speakers though I have successfully built a few kits. Just looking at software for designing crossovers has left me completely intimidated. Kinda wishing I hadn't bought the drivers now, however I really do enjoy building the cabinets. Anyway, I am looking for help reworking the crossover for the Microbes, originally designed by Roman Bednarek ( https://www.rjbaudio.com/Microbe/microbe.html) and modified by Dave Zachary ( https://www.rjbaudio.com/Microbe/Reference_Series_Microbes_v3.pdf ). I have the original Dayton RS125AS-4 woofers but the RS28AS-8 tweeters are no longer available and I have purchased the Dayton RST28A-4 tweeters. These tweeters are slightly more efficient than the RS28AS-8 and have a bit higher of an impedance peak. I can post links for the specs if required. I would like to build two pair, one pair will hang directly on the wall so the baffle step compensation from the original design will not (?) be needed for that pair. Thanks in advance for any help.
Dan
Dan
Two steps: Determine the difference in sensitivities of the tweeters, & re-calculate the values of the L-pad resistors to give the extra padding;
this calculator is good: http://www.sengpielaudio.com/calculator-Lpad.htm
Determine the Impedance of the new tweeter at the crossover frequency, and recalc the caps and inductors for that impedance
this calculator is good: http://www.sengpielaudio.com/calculator-Lpad.htm
Determine the Impedance of the new tweeter at the crossover frequency, and recalc the caps and inductors for that impedance
Thanks for the reply PeteMcK. Sorry for my late response. life gets in the way sometimes. The impedance at the crossover frequency is almost identical for both tweeters so I am going to assume the crossover components can remain the same. Thank-you for the link to the l-pad calculator. I will adjust the resistances as needed.