Looking to run a true 5HZ signal to my Sub woofers but think my anthem receiver will Bottle neck this.

[lovinthehd]

So pray show me the math, that shows a speaker with and Fs of 23 Hz, in an optimal sealed box, rolling off as predicted around 40 Hz can produce a 5 Hz tone above a whisper and be largely distortion products. If you can show how that can happen then you are a revolutionary genius in loudspeaker design.

Curious, you're not including eq and other aspects? Why don't you do the other way around and show proof or your assertion with math?

 

[TLS Guy]

Curious, you're not including eq and other aspects? Why don't you do the other way around and show proof or your assertion with math?

You can read the Eq required from the FR graph, that is not rocket science. You can see output going flat, as FR drops below driver F3, and the power the driver is able to handle going down. The data is all there. Bullock and White's programs to make complex math a computer program is an industry standard. Prior to that, doing it manually was a massive task. I was an early adopter, of using computer software in speaker design. I am still using the first speakers I designed using Bullock and White's original software. Those are my side surrounds, which were originally my locations monitors for live recording. Measurements showed the software to be valid. They were really good speakers then and still are.

 

[Allen Vos]

Curious, you're not including eq and other aspects? Why don't you do the other way around and show proof or your assertion with math?

Notice his response says "It's all there," but he just explains the complexity instead of answering. He still hasn't explained why he uses a 34mm Xmax for my sub when the designer specifies 29mm.

While I know it was mentioned that the difference doesn't matter because I am nowhere near Xmax, my point stands: if he got this fundamental input wrong, what else is wrong? That inaccuracy likely explains why his graphs look different than my own

He also completely ignored the two very specific questions I asked in post #147, choosing instead to reiterate his personal opinion in post #164.

]It is hard to trust this skewed data. I am sticking with the manufacturer's specs, which align with what other FTW-21 users report

]It is crazy how a simple thread about whether my receiver passes a 5 Hz signal turned into this mess. While I have learned a few things, the opinionated, chest-thumping comments are exhausting

 

[TLS Guy]

Notice his response says "It's all there," but he just explains the complexity instead of answering. He still hasn't explained why he uses a 34mm Xmax for my sub when the designer specifies 29mm.

While I know it was mentioned that the difference doesn't matter because I am nowhere near Xmax, my point stands: if he got this fundamental input wrong, what else is wrong? That inaccuracy likely explains why his graphs look different than my own

He also completely ignored the two very specific questions I asked in post #147, choosing instead to reiterate his personal opinion in post #164.

]It is hard to trust this skewed data. I am sticking with the manufacturer's specs, which align with what other FTW-21 users report

]It is crazy how a simple thread about whether my receiver passes a 5 Hz signal turned into this mess. While I have learned a few things, the opinionated, chest-thumping comments are exhausting

It will make no difference as the model shows the driver does not get close to either xmax, so it would make no difference. Actually the lower number would show it to be even more power limited. That number does not affect the FR curves in any way at all. As I said, it only would if the driver reached xmax which it does not, as it is limited by the pressure in the enclosure.

 

[Allen Vos]

It will make no difference as the model shows the driver does not get close to either xmax, so it would make no difference. Actually the lower number would show it to be even more power limited. That number does not affect the FR curves in any way at all. As I said, it only would if the driver reached xmax which it does not, as it is limited by the pressure in the enclosure.

Oh look, you managed to completely miss the point. Again. Truly an impressive streak you have going there.
We are all deeply moved by your thrilling lecture on how there is "no difference" between 29mm and 34mm Xmax. Truly, groundbreaking stuff. We also already know—since we can actually read a data sheet—that the Xmax at 5Hz with 1200 watts is only 23mm. But thank you so much for repeating it. Again.


The actual issue—which you are dodging with the skill of a seasoned politician—is your magical 34mm Xmax spec. You know, the one you pulled out of thin air that flat-out contradicts the manufacturer's official 29mm rating? I asked how you calculated that. Your response? Absolute silence. I asked about the enclosure volume. Your response? Complete amnesia.



Instead of providing a single shred of actual data, you decided to copy-paste your personal opinions, dress them up as facts, and thump your chest about how much "experience" you have. Because who needs math and physics when we can just basket-weave your massive ego into the simulation?

Dealing with you is an absolute joy. If by "joy," I mean an exhausting exercise in frustration with someone who would rather act like a defensive gatekeeper than answer a basic technical question.

Honestly, I am completely done wasting my breath on you. I have already explicitly asked you to stop responding, but apparently, reading comprehension and basic respect are also specs you are completely missing. Do us all a favour and finally take the hint.

 

[m. zillch]

Mini DSP Flex HTx hooked to the CVR amp via TRS to XLR cords for a true balanced signal

You may have a stumbling block here.
Their specs:
"

Frequency Response

20 Hz – 20 kHz ± 0.1 dB"

If it was meant to do lower than 20Hz I'd think they'd state their spec differently, but who knows.

The good news is yesterday I saw an extended frequency response measurement of an Anthem's pre-outs measured the correct way, electrically, and it was down only 1dB at 5Hz; so not very much.

[Normally I'd include an expected JND {just noticeable difference in level detection value in dB] for 5Hz for reference, to judge against this 1dB loss, but it doesn't exist because we fundamentally don't hear 5Hz in the first place.]

Normally Gene doesn't usually set his AP analyzer to measure these useless frequencies but he did for at least some of the response curves, for some reason, here.

 

[Allen Vos]

You may have a stumbling block here.
Their specs:
"

Frequency Response

20 Hz – 20 kHz ± 0.1 dB"

If it was meant to do lower than 20Hz I'd think they'd state their spec differently, but who knows.

The good news is yesterday I saw an extended frequency response measurement of an Anthem's pre-outs [although it was not a sub out but rather a full range out] measured the correct way, electrically, and it was down only 1dB at 5Hz; so not very much.

[Normally I'd include an expected JND {just noticeable difference in level detection value in dB] for 5Hz for reference, but it doesn't exist because we fundamentally don't hear 5Hz in the first place.]

Im assuming you are reffering to the Mini DSP spec?

If thats what you meant, I have already confirmed with mini DSP that the mini dsp flex htx will process down to 10hz. I sent a question back asking if it would still pass through anything below 10hz but im still waiting for a responce. Here is the graph they sent me

Honestly, 10hz is likely as low as I will ever need to go anyways.

Heres a question for you, does this diagram they sent me, tell you much of anything else about the mini dsp?

I have been looking into how to setup the Mini DSP and it looks like it will be an entirely new learning experience.

 

[m. zillch]

Yes I'm discussing the mini DSP thingy.

My vision isn't very good but after blowing up the image it seems to be not a measurement but rather an expected performance in some modeling program? At least that's my call. . . .other than a curious yellow line that looks a bit odd (almost looks hand drawn ?!) it looks to show a very significant loss of 16dB at 10Hz if I'm reading it write, so problematic to your quest I'm afraid.

More: The purple button at the bottom left seems to show (by my read) their program was depicting expected performance in Basic mode set specifically to "look for data between 10Hz-20,000". It is possible that had they select a different range possibly obtainable in "advanced mode" we could know more?