Originally Posted by Molon_Labe
Go to the larger AV and pro audio forums and post a thread - Avoid JBL 7 series - Inaccurate tuning files. They will likely respond to this type of activity as it negative press and potentially revenue impacting.
That would not be fair. I've long been saying the decoded filters* were wrong because I measured the 705i and 708i both incomplete and with the remaining filters (BSS), and also measured the line output from a BSS processor with the filters engaged. So I knew with complete certainty that the decoded filters were wrong. I also knew the speakers perform as intended when used properly.
*"tunings" sounds stupid and pretentious to me, so I will use the standard language.
Originally Posted by Gooddoc
I found the 7's to not be quite as smooth as the M2's and with a bit more "bite"/"brighter".
Both the LSR705i/P and LSR708i/P? The reason I ask is that the 708 is
voiced a little brighter than the 705. Jeff Bagby's definition of reference level for a speaker's FR to be its FR at 200Hz makes sense to me. I've attached the spins for the LSR705i and LSR708i with a dotted "reference level" line. Note that the relative level of the tweeter on the LSR708i is a little elevated, while the LSR705i hews closer to reference level (resonance seemingly inherent to the tweeter - appears in both plots - at ~3.5kHz excepted).
So anyone who hears a little brightness from the LSR708i (or presumably LSR708P), try a low shelf at around 1.5kHz. Maybe start with 0.5dB attenuation and also experiment with 1dB and 1.5dB. I haven't blown up the spin enough to be able to eyeball the "accurate" filter.
The ~3.5kHz resonance is also a notable difference between the 7-Series and M2.