3-4 dB dip at crossover region: what should I listen for to hear it?

I haven’t posted here for about 10 years but thought I’d jump back in to ask about my new JBL 4349s. According to measurements on ASR and even JBLs own graphs, the 4349s have a 3-4 dB dip in the crossover region at about the 1.5 kHz mark. What should I listen for to hear this? I understand that music in this range will be quieter, but I’m not hearing any suckout compared to my Omegas or other speakers Ive had in my system. I’ve played some clarinet and violin concertos, two instruments that spend a lot of time in this frequency range, but I can’t hear an obvious difference. Am I listening for the wrong thing? I’d like to be able to hear this deficiency for leaning purposes if nothing else, so any pointers are appreciated.


Many thanks!


@toddalin, thanks for posting the graphs. Is this generally what's behind the "horn coloration" I've heard mentioned? 


It won't be dramatic, but female voices will be a little darker. Same for violins. Contrary to opinion 3-4 dB is quite a lot. You may not notice anything wrong as is. You would have to compare it with a corrected speaker. Digital preamps with room control and EQ allow you do make comparisons like this. 

I don’t think you will hear it. I have a pair of Klispch RP8000f (own a pair of JBL 4367s too) and they RP8000f has the same kind of thing at the crossover but much worse on axis. Once in room I really don’t “hear” the dip much. In the Klispch it comes across as a slight lack in female vocal presents.

You can probably effect it with toe and distance from the side walls. If you have a computer for a source just boost that frequency with EQ and see how it sounds.


I think JBL should have used a 2” driver and crossed over lower. I know they prototyped a 2” model. Maybe it was too late or cost too much to hit the price point of the 4349. I have never heard them but the 3” driver in the 4367 is pretty amazing. Based on the white paper the duel ring diaphragms have less break up at high frequency compared to the 4” titanium drivers but have more distortion at the lower end and probably why they crossed over the 1.5” driver in the 4349 so high. I know Greg Timbers said the new driver was more about cost control than performance vs the 4” metal domes and he thought the end result was about the same. The pro side that they D2 driver was designed for was all about power handling and most the pro speakers that use the D2 are 3 ways with mids so the driver is not pushed as low.

on a side note, I see a comment about horn coloration. This to me is caused defraction back down the feed throat which the 4349 should have nearly zero due to its advanced design (computer aided).

White paper here if anyone is interested.