All I know is that an L-pad works by putting some resistance in series along with some resistance in parallel. That way the overall load stays the same. If you only put some resistance in series then it changes the crossover point.
I used this calculator to figure out how to pad down a tweeter by about 3 dB...
http://www.mh-audio.nl/Calculators/att.html
I used this calculator to figure out how to pad down a tweeter by about 3 dB...
http://www.mh-audio.nl/Calculators/att.html