The 12" XL is also not for deepest bass - it's about midrange, sensitivity and low THD. When they did the same here it's a very useful driver!
Looking forward to the 10" version ;-)
Looking forward to the 10" version ;-)
6 inch midrange? It does not look to go up to 4kHz, at least shape of the cone is classic woofer and the surround is not inverted, so like the all 6inchers 2.5-3kHz is the most you can squeeze, right? So if it is midrange, 400-500 to 3kHz is less than 3 octaves, and probably some 4 or 5inch is better for it and for 2ways older version seems to be better because of more xmax.
I am having trouble seeing the positioning of it.
I think the optimum use of this driver is between 100 Hz - 2.5 kHz, which is 4.6 octaves.
For example as a 2-way with stereo subs. Or in a 3-way with a woofer-mid crossover at 250 Hz. If the application called for a 500 Hz woofer-mid crossover, this would not be the driver I would use.
j.
Dennis Murphy could drop this into his BMR Monitor and increase the woofer sensitivity by 2dB. Of course some minor changes may be needed to fine-tine the crossover, but the low end wouldn't suffer much, particularly if this is going to be used with a subwoofer.
@bikinpunk 's measurements:
From:
https://www.erinsaudiocorner.com/loudspeakers/philharmonic_bmr_v2/
current model-
https://philharmonicaudio.com/products/bmr-monitor
@bikinpunk 's measurements:
From:
https://www.erinsaudiocorner.com/loudspeakers/philharmonic_bmr_v2/
current model-
https://philharmonicaudio.com/products/bmr-monitor
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It has about +-5mm linear travel, 38Hz resonance frequency and Qts of 0,28. Why should this be a midrange driver?
Not everyone wants to squeeze out 35Hz from a tiny 6" ... make a nice 50Hz tuning frequency and get some SPL out of it. And when you want to hear real bass use a subwoofer - it's a 6" ... And probably less THD from 60-3k - what's not to like?
I understand that this is not everyones design goal but it shouldn't be that hard to get what the reason is behind it?
p.s.: Quick simulation for the 8R version.
9L - 55Hz tuning
12L - 50Hz tuning
15L - 45-47Hz tuning
Not everyone wants to squeeze out 35Hz from a tiny 6" ... make a nice 50Hz tuning frequency and get some SPL out of it. And when you want to hear real bass use a subwoofer - it's a 6" ... And probably less THD from 60-3k - what's not to like?
I understand that this is not everyones design goal but it shouldn't be that hard to get what the reason is behind it?
p.s.: Quick simulation for the 8R version.
9L - 55Hz tuning
12L - 50Hz tuning
15L - 45-47Hz tuning
I wouldn't read too much into SB's Xmax numbers. They tend to be evaluated solely based on BL(x) and even that seems asymmetric in Klippels FWIW. Higher sensitivity kinda implies worse nonlinearities too
Since when does a mid-range needs to go that high from such high frequencies?
Something from say 100-200Hz up till 2kHz or so.
Low-end is better with multi-sub anyway in a system with no compromises.
Only easy way to get rid of room-modes as well as getting rid of inter-modulation problems, incl Sd(x), since there is NO intermodulation anymore at midrange frequencies.
I am thinking about 3 ways with this driver as mid. With or without extra subwoofers. Even if there is some interesting usage the older version of this driver probably can do everything this one does.
Just as a woofer, they have the SB23NBAC as wel as CAC series?
Their 8 inch fullrange also works quite well as a woofer.
The differences between the 3 materials is very very small.
Rest of the motor is basically identical.
But hard to give any advice without any further context.
Rest of the motor is basically identical.
But hard to give any advice without any further context.
The SB23 variants are good - but not great. I had them here for a project of a friend, no comparison to ScanSpeak Revelator 8". But SB34NRXL is on par with the top speakers out there, so it would be great when they optimise their motor to keep up.
An L version of SB29NRX would be nice too, as it's a more popular size
I would definitely use a 10" NRXL driver! Have plenty of the normal 6R Version (6 in my living room cinema and a bunch at different projects) but lower THD >100Hz would give new opportunities. WO24P is a great woofer but needs some volume, sometimes I need smaller cabinets (on/in wall Atmos system for e.g.)
