If you considering 10* drivers a pair of JBL 2123's can do it with 101 @ 1 watt. I use a pair in an active set up effortless.
Rob 🙂
Rob 🙂
In my view the surround is mostly a gimmick and b..tt ugly to boot.
That's the point with the Purifi midwoofers: nice specs, but ultimately neither fish nor fowl.
But perhaps I expect too much from a 6.5" driver that costs only €430,-.
To be fair to the guys at Purifi, the surround certainly reduces Sd modulation.
Of course, there are other ways of reducing Sd modulation, getting a bigger cone, or having no surround.
I'm not going to criticize the cost. If anyone could build a better 6.5" midwoofer, in the Netherlands, or Australia, or England, or USA, for less than €430, please let me know, I'll buy it.
Minimum wage in East Java, where SB Acoustics is located is 2,305,984 IDR per month, as of 2025, this translates to approximately USD 144 /month.
The min wage in Australia is AUD 3663.60 per month, which, as of 2025 is USD 2,371 /month
So when Ford, GM (Holden) and then Toyota closed down their factories in Australia, and opened them in Thailand, it was a sad moment.
But do Australians really want to buy an Australian SUV, at a fair, Australian price? (Spoiler: we didn’t; sales were on the decline for a decade, and we, the market purchased better/cheaper imports)
A complete speaker Made in the Netherlands costs what Dutch and Dutch are selling for... let's hope they are profitable and still exist in a decade.
Danish startup GamuT went bye bye...
Of course, there are other ways of reducing Sd modulation, getting a bigger cone, or having no surround.
I'm not going to criticize the cost. If anyone could build a better 6.5" midwoofer, in the Netherlands, or Australia, or England, or USA, for less than €430, please let me know, I'll buy it.
Minimum wage in East Java, where SB Acoustics is located is 2,305,984 IDR per month, as of 2025, this translates to approximately USD 144 /month.
The min wage in Australia is AUD 3663.60 per month, which, as of 2025 is USD 2,371 /month
So when Ford, GM (Holden) and then Toyota closed down their factories in Australia, and opened them in Thailand, it was a sad moment.
But do Australians really want to buy an Australian SUV, at a fair, Australian price? (Spoiler: we didn’t; sales were on the decline for a decade, and we, the market purchased better/cheaper imports)
A complete speaker Made in the Netherlands costs what Dutch and Dutch are selling for... let's hope they are profitable and still exist in a decade.
Danish startup GamuT went bye bye...
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Don't worry.
At least you still have beautiful areas like Arnhem land, which is named after a ship, which is named after the city where I grew up 🙂
At least you still have beautiful areas like Arnhem land, which is named after a ship, which is named after the city where I grew up 🙂
my choice on sealed midbas also in the middle of the road, between 2x 24W100 back to back or MW180. it will require different box volume, making 2 boxes seems not cost/effort effective. either 80 or 160Hz will be top limit. it will be followed by MW160
Congratulations when you can hear H3 above 10kHz ... you should contact some researchers cause perceiving sound above 30kHz is extremely rare 😎
So no, that's just H3 amplified by the resonance peak but outside of the hearing range and should not cause any issues ... in theory.
I'm with you about harsh sounding of most metal domes but not with the Berylliums - T25B has it's resonance around 50kHz and really doesn't sound harsh, as long as you LIKE precise HF at all! Many prefer nice hf for easy listenig, then these tweeters are not for you.
Can we go deeper into this topic, maybe open a new one?
So of course you can't actively EQ a membrane resonance - it will still be there just less excited.
HOW do the dome resonance reflect back? Let's assume it is sitting at 30kHz - there will not be any excitement with a digital 44.1k source. How does it influence the 5-10kHz range with never exciting the resonance?
My hearing experience is the higher the membrane resonance, the more natural sounds the tweeter. But I never had a REAL explanation for it which I can support with measurements.
It was marketed as MB-Quart, but it may have been designed and produced by LPG.
The tweeter was also used by Totem Acoustics.
The tweeter was also used by Totem Acoustics.
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It’s an awesome mid driver for a center channel in a home theater application though…..dialogue is always clear and present. For music though, too pokey for me.
@Ro808 Many of the MB Quart tweeters were OEM by LPG. The larger mid domes were pretty much all made by LPG.
@mayhem13 Yes, the RS52AN was great for spoken dialog. It has that sharp attack that helps spoken word stand out. For music it's a totally different thing, as the multiple odd order long decay trails give it an aggressive harmonic nature. If you try listening to string music on this mid, it immediately starts to stand out in a bad way.
The mid dome in #273 is the LPG 50FA.
Scanspeak does indeed seem to have fallen into modern, marketing-driven madness.
The Classic line is relevant, the rest mainly consists of overpriced mediocrity, including the woofer in the Totem (#268).
Scanspeak does indeed seem to have fallen into modern, marketing-driven madness.
The Classic line is relevant, the rest mainly consists of overpriced mediocrity, including the woofer in the Totem (#268).
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@Ro808 Yeah, I was mentioning the SS 3806 because it was such an unusual but overall excellent driver. I agree, their classic lineup was excellent, yet they had to jump on the space ship design bandwagon.
Same goes for the larger LPG mid domes. They were simply very well designed drivers despite not always being used within their safe operating parameters. I've replaced alot of blown mid domes on ADS/Braun speakers. People would push these poor things so hard, to the point the dome would physically deform before it went up in smoke.
Same goes for the larger LPG mid domes. They were simply very well designed drivers despite not always being used within their safe operating parameters. I've replaced alot of blown mid domes on ADS/Braun speakers. People would push these poor things so hard, to the point the dome would physically deform before it went up in smoke.
Somehow I have a soft spot for the Braun/ADS speakers.
Now we have this 'high-tech' large dome tweeter (€ 700,-):
Instead of this classic (€ 185,-):
Now we have this 'high-tech' large dome tweeter (€ 700,-):
Instead of this classic (€ 185,-):
What do you like about the classic line drivers in preference to the Revelator or Illuminator lines. The prices of the Classic drivers here don't seem significantly less than those of similar Revelators.
Same question, in terms of measurement, Revelator is far better than Classic line in terms of THD (especially 3rd and 5th harmonics), power handling. They are more expensive, but not that much.
Illiminators line is serving a more niche markets with high excursion and low THD drivers.
Illiminators line is serving a more niche markets with high excursion and low THD drivers.
Short answer: listen for yourself.
The Revelator tweeters can be ignored, perhaps with the exception of the odd duck D2905/990000, which is basically a classic line tweeter.
The Illuminator range primarily consists of marketing fluff and nonsensical 'modern' high end solutions.
The same goes for SB Acoustics; the basic products offer by far the best value for money.
You could just buy an SB19 or SB26 and ignore the rest. These entry-level tweeters actually sound better thanks to the traditional dome + narrow surround.
I'm mainly focusing on the tweeters, but the classic woofers are also good and highly rated.
Regarding "Revelator is much better than the Classic line in terms of THD (especially 3rd and 5th harmonics) and power handling",
distortion of the 15M/4531K00:
In the critical 1.7-3.2 kHz range it's 3rd order dominated.
And this is just the first, randomly picked example.
PKAudio has illustrated the qualities of a classic midwoofer in this thread.
Troy Crowe apparently even found the 10" (25W/8565-00) suitable for midrange duties in his Speaker System No.1695
(I don't, but that's a matter of choice/preference).
As I've stated previously, distortion measurements should be considered as an indicator.
The Revelator tweeters can be ignored, perhaps with the exception of the odd duck D2905/990000, which is basically a classic line tweeter.
The Illuminator range primarily consists of marketing fluff and nonsensical 'modern' high end solutions.
The same goes for SB Acoustics; the basic products offer by far the best value for money.
You could just buy an SB19 or SB26 and ignore the rest. These entry-level tweeters actually sound better thanks to the traditional dome + narrow surround.
I'm mainly focusing on the tweeters, but the classic woofers are also good and highly rated.
Regarding "Revelator is much better than the Classic line in terms of THD (especially 3rd and 5th harmonics) and power handling",
distortion of the 15M/4531K00:
In the critical 1.7-3.2 kHz range it's 3rd order dominated.
And this is just the first, randomly picked example.
PKAudio has illustrated the qualities of a classic midwoofer in this thread.
Troy Crowe apparently even found the 10" (25W/8565-00) suitable for midrange duties in his Speaker System No.1695
(I don't, but that's a matter of choice/preference).
As I've stated previously, distortion measurements should be considered as an indicator.
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