Whatever you want. Just a comparison of an alternate to the Bliesma. A bit higher extension, but can’t go as low.
These graphs also show something much more important.
It's about the relative attenuation of higher frequencies, compared to the lower frequencies.
Not about the idea that people above a certain age can't hear any higher frequencies anymore.
What it shows us is it’s more important to focus on the best results in the range that we hear best. What it doesn’t show us is most instruments as well as the human voice is in the most sensitive area of human hearing as well. So ideally if we can get away with not crossing over in the sensitive range, it’s ideal. And this Bliesma mid allows us to do so without real world compromises.
The M74S have the lowest cone distortion/breakup of of the bunch (BlieSMa)
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Yes it’s an amazing driver. And it’s going to be my go to driver in high end immersive sound theatre installs. Hoping it can handle 117db/1m with a 4th order at 600hz. This will allow for the Atmos standard of 105dB at the listening position up to 4m from the front mains.
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While the M74 series is interesting, the SBA SB12CACS25 is a fair driver as well at $65 ish dollars. I think we should keep this driver in mind when looking at small midrange drivers. Good pistonic range of 300Hz-3kHzm well controlled distortion and not a lot of stored energy
SB Acoustics SB12CACS25-4 | HiFiCompass
SB Acoustics SB12CACS25-4 | HiFiCompass
I am waiting on the Purifi 4" M. I like smaller midranges, they are easier to incorporate with with the tweeter, with and without acoustic lens. Due to the smaller size, they usually have better distortion figures and lower stored energy.
This is immensely beneficial to retain clean performance form say 500 Hz and up. Downside is as you say, max SPL. But very few need more than 100dB in their living room, so I think we are good 😉
There are tricks to get a higher output, its called more drivers or D'Appolito configuration 😉
Yes!
Also something a lot of people seem to completely forget.
It's like amplifiers basically.
Like a 15W amplifier that has an amazing performance.
All great, but that also means there is only a limited dynamic range you can get out of it. Or maximum SPL practically speaking.
(in fact, physical xmax can basically be seen as the voltage rails of an amplifier)
With speakers there is even a double penalty, since a bigger speaker will perform often better because it needs a whole lot less excursion.
And less excursion automatically means less distortion.
So in other words a 4 inch Purifi is nice and all, but only in a few very specific niches. Were anything slightly bigger won't fit anymore.
I loved the idea of the 4” Purifi woofer. But it maxes out at 102dB from 1m away. Great for use in a camper or motor home. I’d use it there.
ScanSpeak 15M/4624G00 with its 93.9 dB(2.83V/1m) should be able to do 108dB.
ScanSpeak 15M/4624G00 | HiFiCompass
ScanSpeak 15M/4624G00 | HiFiCompass
Personally I need at least 116dB/1m continuous from a mid for my applications. The Radian Beryllium compression has no issue with it. But hoping I can get that out of the Bliesma.
The 745NEOBe Compression Driver from Radian Audio | audioXpress
The 745NEOBe Compression Driver from Radian Audio | audioXpress
The ATC dome mid can do 118db continuous all day crossed over at 380hz, without breaking a sweat.
SCM200ASL Pro | ATC Loudspeakers
SCM200ASL Pro | ATC Loudspeakers
116dB continues?
How fast do you want to loose your hearing exactly?
Or I guess that's for a pro application?
I would never ever use a normal dome for more practical reasons.
How fast do you want to loose your hearing exactly?
Or I guess that's for a pro application?
I would never ever use a normal dome for more practical reasons.