Just noticed this new driver on Solen:
https://solen.ca/en/products/bliesma-w137t-854-137mm-textreme-dome-midbass-5inch
Bliesma-level pricing of course but looks like a nice driver. Less pronounced breakup compared to their metal and paper dome midranges. The low sensitivity means more bass response. Seems like it could work well with a simple crossover and lower crossover frequency than their other drivers.
https://solen.ca/en/products/bliesma-w137t-854-137mm-textreme-dome-midbass-5inch
Bliesma-level pricing of course but looks like a nice driver. Less pronounced breakup compared to their metal and paper dome midranges. The low sensitivity means more bass response. Seems like it could work well with a simple crossover and lower crossover frequency than their other drivers.
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I wonder why the Textreme dome is so heavy and the motor only 1.1 T VS the tweeters line they used to spec?!
2k8 hz is perhaps a little optimistic, how the baffle step behavior with a mid dome is ?
On the cool side, according the H3, H5 (h7 🙂 ) measurement, it could really permitt a sota 100 hz to 150 hz crossover or higher but with low slope due to the good Xmax.
Too much expensive till they have raised the price of the whole line due to the excuse of inflation though.
2k8 hz is perhaps a little optimistic, how the baffle step behavior with a mid dome is ?
On the cool side, according the H3, H5 (h7 🙂 ) measurement, it could really permitt a sota 100 hz to 150 hz crossover or higher but with low slope due to the good Xmax.
Too much expensive till they have raised the price of the whole line due to the excuse of inflation though.
Indeed! Polar matching XO points:
6.4 cm Vc dia = ~34400/pi/6.4 = 1711 Hz
33.8 Hz Fs = (33.8*1711)^0.5 = ~240.5 Hz
(240.5*1711)^0.5 = ~641.5 Hz
etc............
We want at least -24 dB/4 octaves away for 1st order = 33.8*2^4 = ~541 Hz, so the ~641.5 Hz XO is the 'no-brainer' choice for me. 😉
6.4 cm Vc dia = ~34400/pi/6.4 = 1711 Hz
33.8 Hz Fs = (33.8*1711)^0.5 = ~240.5 Hz
(240.5*1711)^0.5 = ~641.5 Hz
etc............
We want at least -24 dB/4 octaves away for 1st order = 33.8*2^4 = ~541 Hz, so the ~641.5 Hz XO is the 'no-brainer' choice for me. 😉
From what I’m seeing, it isn’t all roses.
The efficiency is low, making the sensitivity also quite low. At least this one is available in 8 Ohms, but with baffle step accounted for the 5 Ohms and 8 Ohms versions reside in the 78-82dB range. Good thing it handles 75W, because it’s going to need 80W to achieve what my midwoofers do with 10W.
With this driver’s beaming there will need to be some extra care to get a good system power response. The crossover ends up in the most sensitive part of the human auditory spectrum. I’d like to see some harmonic and intermodulation distortion plots, but don’t see a special use for this $1000 driver with its big frame.
They may have been marketing this with the idea that designers would adopt it for two-way bookshelf speakers, but there is alot of competition in that bracket.
The efficiency is low, making the sensitivity also quite low. At least this one is available in 8 Ohms, but with baffle step accounted for the 5 Ohms and 8 Ohms versions reside in the 78-82dB range. Good thing it handles 75W, because it’s going to need 80W to achieve what my midwoofers do with 10W.
With this driver’s beaming there will need to be some extra care to get a good system power response. The crossover ends up in the most sensitive part of the human auditory spectrum. I’d like to see some harmonic and intermodulation distortion plots, but don’t see a special use for this $1000 driver with its big frame.
They may have been marketing this with the idea that designers would adopt it for two-way bookshelf speakers, but there is alot of competition in that bracket.
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