snoopy said:
It is clear you do not know what you are talking about, and do not wish to learn. You wish only to troll about a product you have never tested or touched. You respond to only the posts you think you can counter and move from bogus talking point to bogus talking point.
I am--provided you do not misrepresent my comments--done with this conversation after this post
How can you tell that the servo is not reducing distortion--nothing in this graph compares servo to non servo operation. You DO NOT understand this graph. You do not understand any of the distortion graphs posted by IKKA.
It is clear the servo results in extended bass response (use of the t/s parameters demonstrates this clearly - refer to earlier post by me)
It is clear the servo sub results in lower distortion than many expensive 12 inch drivers in sealed cabinets (in fact at 20hz it out performs all sealed 12's on the HTShack site -- when you actually compare REAL output levels)
I have yet to hear an owner complain about the sub.
Done-
Sean
otto88 said:the winter in Melbourne is not as bad as at latitudes of say 45 degrees, but I find it somewhat a downer
(disclaimer: an ex Sydney person)
On topic . .
> the only subwoofer I have tried that can integrate reasonably seamlessly with my mains (Dunlavy IV-A's, no slouches) and do double duty for a good HT rumble
which Rythmiks are you using?
Cheers
I am using the DS12CV (compact 12" kit) x 2. I wanted a smaller subwoofer which had reasonable SPL levels for a dedicated media room with an emphasis on SQ. I am happy with its performance as it meets my needs, and know that other subwoofers I had auditioned (albeit not a wide range) were not up to the task. I also have a friend who built the 15" servo kit, and he gets better SPL from it, and he has a bigger room.
If I was to pick a fault I would say that the amplifier is a little weaker than it should be, as it does go into shutdown occassionally on very LF heavy movies, and I don't hear any driver distress when that happens.
The point made above about the rythmik's doing a reasonable job with distortion above 50Hz (and it not mattering as much below that) is probably why it makes a good companion for a good audio system. Although my mains do an excellent job with music reproduction, the Rythmik adds weight / presence to the sound that IMO makes the music more enjoyable and strangely seems to tighten the imaging. When listening I can't tell that the sub is on, and if I switch it off the music goes flat. (mostly because it helps to fix a bass null in the room that I can't fix with just the mains alone).
All the above is subjective of course.
I'm a happy Rythmik customer and would recommend this product to others.
Regards,
Dean
I have a DS1500 sub.
I have zero complaints about it.
Rythmik offered prompt shipping, great customer service, quality components, and a package which delivers all that I was lead to expect, in spades.
I have zero complaints about it.
Rythmik offered prompt shipping, great customer service, quality components, and a package which delivers all that I was lead to expect, in spades.
Instead of throwing red herrings into the debate all of the time here is the point I'm trying to make for the 100th time 🙁
The manufacturer of the Rythmik subwoofer makes the following claim:-
DOES THE RYTHMIK SUBWOOFER MEET THE CLAIMS OF A "WELL DESIGNED SUBWOOFER" ??
YES or NO ??
If you don't know the answer to this question then why are you arguing ??
The manufacturer of the Rythmik subwoofer makes the following claim:-
DOES THE RYTHMIK SUBWOOFER MEET THE CLAIMS OF A "WELL DESIGNED SUBWOOFER" ??
YES or NO ??
If you don't know the answer to this question then why are you arguing ??
snoopy said:
YES (load it 1/8th space and measure from 1m)
I lied about being done...but i was right about you not responding to any argument cant handle
If porsche advertised that a proper race-car with their awd system should go 200mph...I wouldn't suddenly think the carrera4 was crap because it couldn't.
Sean
seanzozo said:
Your arguments are fallacious and are not worthy of comment. Just stick to the issue and please provide the evidence. Your opinion about the capability of something is not construed as evidence.
snoopy said:
Every time you have made some bogus claim -
-like suggesting the velodyne 12" measured better, OR
-like suggesting there were worlds of difference between an 18 inch servosub and the Rythmik and thus the Rythmik servo couldn't be effective OR
-that a graph which displayed only harmonic content from H@ down could tell you whether a servo was reducing distortion
I have "provide[d] the evidence."
If my argument includes numbers, claculations, comparisons or evidence - you don't comment -> they must be "not worthy of comment"
Rather, when it is demonstrated that you don't get it, you retreat to your straw man argument best summarized as follows: "look a this single claim on a large website that doesn't reference any particular product which isn't met by the smallest, lowest output, cheapest product on the site (but could clearly be met by the 15 inch vented Rythmik) - that must mean all rythmik products are junk and the designer a hack...."
It is a dumb line of argument.
If you don't like the advertising -> don't buy the product
But what you have done, numerous times on this thread is misrepresent the actual measured performance of these drivers with uneducated comparisons
Sean
seanzozo said:
Once again I'll be more specific this time.
DOES THE RYTHMIK SUBWOOFER MEET THE MANUFACTURERS CLAIMS OF A "WELL DESIGNED SUBWOOFER" ACCORDING TO THE MANUFACTURERS CRITERIA OF REPRODUCING 20 Hz @100 dB @ LESS THAN 3% THD ??
If the answer to this question is YES then please provide the objective evidence needed to back up this claim !!
LOOK I CAN BE A NINNY USING UNDERLiNE BOLD CAPS WITH EXCLAMATION POINTS!!!!!!!!!!
What is THE RYTHMIK SUBWOOFER? a sealed 12 (at what cubic feet); the vented 12 they used to make; a sealed 15; a vented 15; vented 15 in a sonotube transmission line?
Besides not making clear which sub you refer to, the text of your question is not a verifiable premise, it is marketing hyperbole. At what distance and into what loading (full-space, half space, eighth space etc.). At some distance and into some loading any of the rythmik subs will hit 100db at 3%.
How about this...We split the cost of a 15 inch rythmik vented kit...If it hits 100db at 3% distortion or less at 1m into half space in a cabinet I design...I get to keep it...If not you get to keep it. (I'm betting I get to keep it)
Sean
I'd like to also comment that the "Claim" you keep chirping about also suggests in the preceding sentence that many well regarded subs have 15% distortion at 100db - very few of the sealed subs on the HTSHACK tests hit 100db ACTUAL output at sub 20% suggesting that the quote is referencing vented subs or an alternate measuring situation - loading or distance such that none of the data you have presented would disprove the claim. That kind of logic might be beyond you.
As examples the CSS 2x15 hits 98db at 20hz at 28% the tc sounds 2x15 hits 101db at 23% ----> these point strongly to the suggestion that the RythmiK manufacturer was either referring to vented alignments or a different loading/distance
What is THE RYTHMIK SUBWOOFER? a sealed 12 (at what cubic feet); the vented 12 they used to make; a sealed 15; a vented 15; vented 15 in a sonotube transmission line?
Besides not making clear which sub you refer to, the text of your question is not a verifiable premise, it is marketing hyperbole. At what distance and into what loading (full-space, half space, eighth space etc.). At some distance and into some loading any of the rythmik subs will hit 100db at 3%.
How about this...We split the cost of a 15 inch rythmik vented kit...If it hits 100db at 3% distortion or less at 1m into half space in a cabinet I design...I get to keep it...If not you get to keep it. (I'm betting I get to keep it)
Sean
I'd like to also comment that the "Claim" you keep chirping about also suggests in the preceding sentence that many well regarded subs have 15% distortion at 100db - very few of the sealed subs on the HTSHACK tests hit 100db ACTUAL output at sub 20% suggesting that the quote is referencing vented subs or an alternate measuring situation - loading or distance such that none of the data you have presented would disprove the claim. That kind of logic might be beyond you.
As examples the CSS 2x15 hits 98db at 20hz at 28% the tc sounds 2x15 hits 101db at 23% ----> these point strongly to the suggestion that the RythmiK manufacturer was either referring to vented alignments or a different loading/distance
seanzozo said:
I'm not interested in your rationalizations. Answer the question. Yes or No ??
If your answer is Yes then please provide the evidence and the conditions in which the tests were made !!
Surely you are not that simple that you can't understand a simple question
My comments are not rationalizations - they are logical thought.
Simple yes/no questions can often be unanswerable-i.e. Have you stopped smoking crack, yes or no?
Please pay attention: Until the question is such that it can be answered it cannot be answered! The question as posed does not have enough parameters to test - you do not specify a distance nor a loading -> thus either answer will do for almost any subwoofer.
However note this- > the moment you do specify either of these - I will note that the Rythmik site does not. The comment you point to is not testable in its presented format, it is marketing literature.
To whinge and complain about it with multiple exclamation points is just moronic.
I know gifted engineers and gifted rhetoricians, you are neither.
Sean
Simple yes/no questions can often be unanswerable-i.e. Have you stopped smoking crack, yes or no?
Please pay attention: Until the question is such that it can be answered it cannot be answered! The question as posed does not have enough parameters to test - you do not specify a distance nor a loading -> thus either answer will do for almost any subwoofer.
However note this- > the moment you do specify either of these - I will note that the Rythmik site does not. The comment you point to is not testable in its presented format, it is marketing literature.
To whinge and complain about it with multiple exclamation points is just moronic.
I know gifted engineers and gifted rhetoricians, you are neither.
Sean
seanzozo said:
Leave it Sean. First year EE's don't know any better - they always know everything. Your wasting your keystrokes who will realise, in time, what a fool he made of himself.
What does it matter? You can generally go above 10% distortion in the low frequency range without hearing anything out of the ordinary.
The question should be:
Does the sub perform?
Does the sub outperform like priced conventional subs?
The question should be:
Does the sub perform?
Does the sub outperform like priced conventional subs?
Cloth Ears said:
I suppose Thiele and Small were just idiots as well for having engineering qualifications 😉 More fool them for wasting their time at University when they should have just bummed around and become audio gurus and then they would have been able to make more contributions to the science of audio 🙂🙂🙂🙂🙂
billnchristy said:
No the question should be "Is it fair to use highly exaggerated or false claims to disadvantage the competition in order to sell your own products ??"
Guys, give it a rest. If you've got anything factual to add, do so, but personal sniping is out of bounds.seanzozo said:
Like I said earlier if you don't know the answer to this seemingly simple question then why are you arguing and taking sides ?? You should just back off instead of wasting valuable Internet bandwidth
Also your Argumentum ad Hominem fallacies do not help the debate whatsoever.
huh?? Thiele & Small correlated measurable electrical and mechanical driver parameters into a basis for predicting loudspeaker behaviour......
What an oddity this has become.......
What an oddity this has become.......
snoopy said:
Nope.
They listened and learned, made their own experiments and measurements and drew conclusions from what they learned. Whether they had qualifications or not does not actually matter, it's how they went about what they did that counts. The fact that they had engineering qualifications means that they knew that it was best to "listen and learn, make their own experiments and measurements and draw conclusions from what they learn".
Anyone with any experience in audio could take the Rythmik sub, build a vented enclosure tuned to exactly 20Hz and (without a servo at all) produce the less than 3dB @ 20Hz at 100dB that you're looking for. It wouldn't be any good for anything else (like the car dB-drags 😉), but it would cover the bases. But why would anyone want that? As testimonies show, the subwoofers advertised on the site are all cheap, they all produce excellent results, and that is what counts.
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