How low can we really take this 2426/2370 horn combo? The JBL literature shows loading down to 500 hz. with a 630 hz. minumum crossover(20 watt maximum cont.) At 20 watts we're close to 130 db, so shouldn't be a factor. Want to mate with a pair of 2226 J woofers per channel. I assume that 12 db low pass, 18 db high pass with Wayne's rc network would be the best implementation? Are there programs available to determine proper crossover components by simply plugging the numbers? Also, anyone used the JBL 2426 with the Altec 511 B horn? Any comparisons? Would the rc network still be appropriate? Thanks to all! Jerrod