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

@toddalin thanks for the explanation and video. I thought both sets of speakers came off pretty bad in rhat video, but - and feel free to accuse me of being biased - the JBLs were much more tolerable. The Klipsch sounded quite shouty to me, whereas the JBL had depth and warmth (warmth relative to the Klipsch that is).

I’ll also note that the JBLs in the video were the 4367s, the model above mine. According to Erin at Erin’s Audio Corner, the 4367s measure and sound great. Erin is also one of the guys on the ASR 4349 thread who thought the 4349s measured terribly (I like Erin and subscribe to his Patreon).

The depressed upper midrange is no stranger to JBL professional monitors all the way back.  Some are worse than others.

The ASR measurements suggest that the midrange dip is less pronounced in-room. Using a 12in driver in a two way design is always going to be compromised. Dips in frequency response are not always interpreted by the brain as dullness - a drop in the midrange may be heard as brightness because it can make the higher frequencies seem elevated relative to the midrange.

As I said, dips in the upper midrange are characteristic of the breed when using horns.

JBL 4348:

4345:

4355:

4333 (L300 pro equivelent) I have a pair of L200 modified to L300 specs and the dips drive me crazy. I don’t even listen to them anymore since I created the Mermans.

4313: 12" 4-way with no horn:

"I’ll also note that the JBLs in the video were the 4367s, the model above mine. According to Erin at Erin’s Audio Corner, the 4367s measure and sound great. Erin is also one of the guys on the ASR 4349 thread who thought the 4349s measured terribly (I like Erin and subscribe to his Patreon)."

Do they really? I hear slight the depression and Stereophile certainly found it:

In home measurement:

@toddalin That was my memory/expectation as well.