Well that looks all nice! 🙂
T25A
M74A
26W/4867T
FA253
Should give pretty ultraclear SOTA System all components reasonable sized and budgeted. 👍
Honestly, I would take the RSS315HFA-8 for the woofer section. Somehow it fits the overall "alu cone/dome pistonic operation" style of the speaker better for convenience, and for pure subwoofer duty the Dayton can just stroke more air in the lows. You have to push it more, but as you have decided to go 4-way and give it a separate fat amp...
P.S.: Have you recognized that you probably build you endgame system there 😉
T25A
M74A
26W/4867T
FA253
Should give pretty ultraclear SOTA System all components reasonable sized and budgeted. 👍
Honestly, I would take the RSS315HFA-8 for the woofer section. Somehow it fits the overall "alu cone/dome pistonic operation" style of the speaker better for convenience, and for pure subwoofer duty the Dayton can just stroke more air in the lows. You have to push it more, but as you have decided to go 4-way and give it a separate fat amp...
P.S.: Have you recognized that you probably build you endgame system there 😉
Add subwoofers.
Not to worry. End game is an illusion.
Not to worry. End game is an illusion.
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For sure, but in this case, the more powerful XXLS models appear to have flatter response out to 1kHz.
Well, I am hopeful that I will get a high level of performance out of it, but "end game" implies last, final, culmination... I don't ever expect to quit. For me, "end game" is a depressing concept...
How about...Have you recognized you have probably built your halftime celebration system there?
Yes, a system befitting of Kendrick’s half time show
As for (sub)woofers, It’s different shades of grey.
As Jim said previously driver designer optimises for different things, depending on the intended market/application.
A THX/Atmos theatre “subwoofer@ does 32Hz to 120Hz for 115dB at the listening positions.
A stadium “subwoofer” does 40Hz to 200Hz with >140dB for listening at up to or beyond 100ft.
A home “subwoofer” aims for 20Hz to 80-160Hz i order around 105dB at the MLP.
The designer needs to pick his listening distance and SPL and decide on the cabinet size/weight before choosing the alignment Eg. Tapped horn/vented/sealed and then appropriate driver.
In re: XLS
When this was release around 1998-2000; to me it appeared that it was designed to be used with the matching passive radiator in a small 3/4 cu ft box.
in 2001; when with 25Hz and 105dB in 20L was considered very small (at the time)
Original Peerless (DK) XLS 12” 830500 specs and Application note:
Siegfried Linkwitz selected it as a the driver for a sealed box subwoofer ~2001
“Thor”
https://www.linkwitzlab.com/thor-design.htm
This inspired me to take a closer look at the original 10” XLS “830452”
https://techtalk.parts-express.com/...-new-again-peerless-xls-in-sealed-box-f3-23hz
As for (sub)woofers, It’s different shades of grey.
As Jim said previously driver designer optimises for different things, depending on the intended market/application.
A THX/Atmos theatre “subwoofer@ does 32Hz to 120Hz for 115dB at the listening positions.
A stadium “subwoofer” does 40Hz to 200Hz with >140dB for listening at up to or beyond 100ft.
A home “subwoofer” aims for 20Hz to 80-160Hz i order around 105dB at the MLP.
The designer needs to pick his listening distance and SPL and decide on the cabinet size/weight before choosing the alignment Eg. Tapped horn/vented/sealed and then appropriate driver.
In re: XLS
When this was release around 1998-2000; to me it appeared that it was designed to be used with the matching passive radiator in a small 3/4 cu ft box.
in 2001; when with 25Hz and 105dB in 20L was considered very small (at the time)
Original Peerless (DK) XLS 12” 830500 specs and Application note:
Siegfried Linkwitz selected it as a the driver for a sealed box subwoofer ~2001
“Thor”
https://www.linkwitzlab.com/thor-design.htm
This inspired me to take a closer look at the original 10” XLS “830452”
https://techtalk.parts-express.com/...-new-again-peerless-xls-in-sealed-box-f3-23hz
@tktran303 -- thanks for all that, esp your dual XLS10 sub from 2 decades ago!
Makes me think about pulling them from my Orions to try something else.
The Dayton rs256hf is kinda similar. It too doesn't need a big box. I used ~1.2 cf sealed & DSP to get 25Hz at around 100 dB.
Makes me think about pulling them from my Orions to try something else.
The Dayton rs256hf is kinda similar. It too doesn't need a big box. I used ~1.2 cf sealed & DSP to get 25Hz at around 100 dB.
LOL yes I'm pretty sure you will have many ideas in future! 🙂 But the system you currently build will be really hard to beat....
A good guide to find woofers suitable for HiFi is the ratio of the mechanical resistance to cone mass: Rms/Mms, or the Fs/Qms.
The lower, the better for Hifi, low Fs/Qms = detailed sound at low volume
If the woofer has a Fs/Qms of about 4 or less then it's a good candidate for HiFi
The lower, the better for Hifi, low Fs/Qms = detailed sound at low volume
If the woofer has a Fs/Qms of about 4 or less then it's a good candidate for HiFi
What is the "suitability for hifi", besides the often known thing that drivers with higher Qms have better bass response and are faster and more detailed?
And while that can be true for very low Qms drivers (Usher and Volt - which are always described as relaxed or even slow in case of Usher), but Wavecor and SB24 have similar or even higher qms than ScanSpeak, but everyone knows that SB and Wavecor is giving round and relaxed sound, while Scan Speak is very precise, fast driver with a lot of definition and slam, which is not the case with Wavecor and SB.
Usher 8948 has 1.98, Volt Radial 10 inch around 3, W, SB, SS 5-6
I am trying to say that W and S are worse/better than SS, just different, however, that one magic parameter is not telling the whole story.
That's why I said that it's the relation between Fs/Qms or Rms/Mms that's more useful than Qms on its own.
On woofers there are other (more important?) variables to consider than low level TSP parameters or other properties of the resonance of the system.
And where does this pearl of wisdom originate (other than a Bernd Timmermann opinion)?
I have a hunch you know 😉 but linearity of suspension and motor force under Δx, resonances in moving parts, thermal behavior come to mind.
I would say that Le(x), Bl(x), Cms(x), and Sd(x) are fairly important. The closer they are to being constant with x, the better.
And the easiest way to do it is to have x as close to 0 as possible. So that pretty much equals Sd as big as possible. But that way of thinking due to cone breakups is almost always getting us min 3 and most likely to 4 way speaker.
Still waiting for first person that will risk T34/M142 combination 🙂
Still waiting for first person that will risk T34/M142 combination 🙂