Last night I compared the 3134 and 3135 (4430,4435) networks in detail.
Why there is a difference in the section for the HF driver? Seems that this one comes in earlier (means at deeper frequency). For what reason?
The other thing is that JBL reduced the HF output for 2 dB. See spec sheet or compare the 2 vs 2,5 uF Cap in the HF line.
Please enlighten me