Originally Posted by John Schuermann
Speaking of the SCL2, here is some cool info about it
John, can I ask a couple of question about the SCL-2?
1. I assume the the drivers above and below the D2 are playing the same frequencies (i.e. in an MTM style configuration), and the lowest driver is just getting lower frequencies with a lower cross-over than the other two (hence the 2 1/2 way design mentioned in the specs). Does this mean that the speaker can be mounted upside down - i.e. with two of the 8" drivers at the top - without any change in performance?
I've only skim read the manual, and I see it does suggest inverted mounting if the centre is length-ways below the screen - but just wondered if you could ask your engineering contact if there is any audible or measurable difference from an inverted mounting?
I'm hoping not, as this would would suit my own behind screen placement much better, putting the D2 much closer to seated ear level, whilst also having none of the driver obscured by the lower bar of the screen frame.
2. I've lost track a little, do you still have the M2's? If so, is there any audible difference in performance between them and the SCL-2? i.e. do you think you could identify any difference blind?
3. You mention your engineer contact said that the SCL2:
. . . seems to be happy just mounted in its backbox and stand-mounted as well as it is in the wall. . .
. Do JBL feel then that this would be a valid alternative installation method then, without any significant detriment to performance? (to be honest I thought my SCL-4's sounded better in free space on a stand than they did once properly mounted on the wall - though that could have just been down to room position also).
I had mistakenly thought thay shared the identical D2 driver, but I've just noticed that the M2 and SCL-2 appear to use different D2 drivers:
M2 - D2430K 3inch Dual Diaphragm Dual Voice Coil Compression Driver - crossover @ 800Hz
SCL-2 - D2415K, 1.5inch Dual Diaphragm Dual Voice Coil Compression Driver - crossover @ 1.3Khz
I guess that might lead to them not sounding identical.