How good are our DIY units compared to off the shelf stuff?

Apparently, none of the forty major speaker manufacturers for which he has "improvements" knows how to properly design a speaker.

I guess their engineers just aren't that good.

And their extensive testing facilities and procedures are somehow lacking as well.

Even the very expensive products still need improvement
Apparently, none of the forty major speaker manufacturers for which he has "improvements" knows how to properly design a speaker.

I guess their engineers just aren't that good.

And their extensive testing facilities and procedures are somehow lacking as well.

Even the very expensive products still need improvement.
You do realise you live in a parallel universe. Every l mean every manufacturer and retailer despises these public forums for what they see as endless dribble, mis information, tyre kickers who get off on over hypothesising and mis representation of the facts.
 
Do you mean the same GR Research that sells cryo-treated AC power cords for $369 and then recommends 200 hours of burn-in for them before they sound their best?

https://gr-research.com/product/b24-power-cable/

That alone pretty much destroys any credibility they might have on any other subject.
Hi Rob,

Hidden in the details is the fact that his Clio scale is 5 db division with one db increments.

Whereas many manufacturers publish curves that are 10 db divisions with 5 db increments.

That is the limits of the log x axis makes quite of difference to what might seem a smooth or flat curve and what isn’t.

Then there is smoothing in which we are often not told.

Slide from that ate network upgrades worth it. Well it depends on your whole set up. Those charge coupled networks are better than a non Solen cc network (un categorically).

More recently jbl have started putting lots of small best value for money value caps in parallel claiming this improves the non ideal characteristics of caps. This was a feature news story on Harman’s Luxury Group newsletter

As you say it’s about picking out the take aways that are the useful relevant bits of information.

In the HiFi business none of them are completely honest. It’s entertainment and they are there to make money.

Food for thought.
 
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I think you entirely missed the irony I used in that post.

I was really supporting the manufacturers and dissing the list by GR Reseach of the forty companies that they have so called "improvements" for.
Well l am in context supporting GR research.

Sorry l don’t understand your grammar. It’s seemingly a reversal of slap stick humour and clear thinking English. Sarcasm possibly?

That Klipsch system mod that was supported by Amir which he gave it the thumbs up.

So GR research requires some intelligence to understand it.

It imho comes back to attaining a fundamental knowledge so you aren’t just dissing as you say.

I will say your craft beers rate highly in my estimation. Particularly the Serra Nevada Pale Ale.
 
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Anyway l am growing to enjoy Danny’s You-Tubes and l won’t have a bad thing said about him.

If you can appreciate context he’s actually filling a niche market and has established himself as a business to be reckoned with over the past ten years.

If Amir is prepared to endorse a Klipsch upgrade by Danny l am impressed. Amir is an industry disrupter.
 
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So, I guess you believe now that cryo-treating AC power cords and then burning them in for 200 hours will make a significant difference in the sound from your stereo system.

That's fine, you are entitled to believe whatever you want. But there are some of us here won't buy into that kind of nonsense and don't trust anything else that the person who spouts it has to say. It essentially destroys any credibility for that person.
 
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While seeing the power cords in his shop cured me for any ideas about honesty. I'm still able to watch the videos and see the lack of bracing and in many cases thin walls of the production speakers. I don't trust speaker manufacturers any more than I trust GR.

Edit: spelling.
 
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So GR research requires some intelligence to understand it.

Yes one does need to have a reasonable grounding in the basics of speaker design to recognise what he gets wrong and what he gets right. People new to the hobby are not going to have this though and so it is important that more experienced hobbyists point out that his advice on speaker design is unreliable. People new to the hobby are more likely to spot the snake-oil and the poor value though and require less help on this aspect.

Anyway l am growing to enjoy Danny’s You-Tubes and l won’t have a bad thing said about him.

I was tempted to ask how but then wondered if the mods might help you. Prior to youtube he and posters promoting his products were a significant problem for audio forums (e.g. see point 2 here). I've had a quick search and he and his products don't appear to be banned here (?) but the mods are likely to have a pretty low tolerance for discussions that follow the usual trajectory. If you are careful about how you promote him and his products it shouldn't take long before the thread is locked. And then there won't be a bad thing said about him.:)
 
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So, I guess you believe now that cryo-treating AC power cords and then burning them in for 200 hours will make a significant difference in the sound from your stereo system.

That's fine, you are entitled to believe whatever you want. But there are some of us here won't buy into that kind of nonsense and don't trust anything else that the person who spouts it has to say. It essentially destroys any credibility for that person.
Please don’t miss quote me. Okay.

It was a tongue in check remark on liking his YouTube.

My point was clear and your attempts divert to OT are trivial. It was about looking at what’s actually inside some loudspeakers? Not much! They skimp on refinements in the less expensive ranges. This was pointed out by another famous designer Andrew Jones on another YouTuber’s channel.

Jones made it clear that the higher cost of more expensive ranges goes into refining a design.

So GR Research is educating the consumer. He doesn’t can every loudspeaker.

That is what l like about it because it closes the loop on the point of this thread. A diy enclosure can be superior with solid baffles, bracing and quality sound absorption panels. That makes a measurable difference. You can see that in Amirs measurements of the Klipsch M600 where the additional acoustic damping cleaned up the woofer measurements.

If you can’t comment on anything productive then keep scrolling on rather stir up angst and division in what has been an otherwise interesting discussion.
 
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I'm afraid that sometimes the truth hurts.

Hurt who? Re branding what you think people say or do isn’t up to you. It’s up to them.

As l said it’s up to the individual to select the take aways of these various channels.

Shrewd industry insiders know Topping and Amir are collaborating with the AP525 analyser dash board settings. But we let the entertainment roll out because it has no impact the real business. Those who follow and enjoy it like any other spectator sport get a kick out of it.

Robert Murdock did the same thing with Fox News. Its no big deal. We all make our own choices.
 
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So, who exactly are these shrewd industry insiders that supposedly know about Topping and Amir misleading us? Are we here being kept in the dark and lied to like fools for someone else's kicks?

If that's really true, and you know so much about it, then please tell us more so we can stop being played upon as dummies.

Not sure why you brought up Fox News, but since you did, I find it be the only reliable news source there is.
 
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The frustration in this thread could be distilled to the unobtainable concept of objective speaker evaluation. The East German judge awards a 9.7 for a floor routine while the Corsican expert reports a 9.4 while perceiving the same exercise.

Yes, approximated, simulated anechoic near field on axis and off axis measurements of a single speaker can then be extrapolated to measurements and a correlation to experience in an average room with a pair of speakers…..but the East German may still prefer soft violin concertos on her open baffles while the Corsican only listens to Kid Cudi and Daft Punk on planar magnetics….etc etc etc.

Then there’s variances in human ear/brain anatomy and function/defecits/age related changes.

A debate without obtainable objectivity, thus, is similar to judging an Olympic ice skating or gymnastics floor exercise….people will disagree….but we get closer to some truth.
 
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The LS50 Meta 1793 is available in China for $150/pr (OEM). I just got them as a challenge -- very different behavior from everything I've tried before. Some XO partial info (or mis-info) can be found including a circuit. It would be great if someone or team seriously tackled it. (Don't know how different from regular LS50 or Q150.)
OK I performed a very baseline experiment and the coax beat my (low) expectations considering the rough-shod effort. First I tested straight-through acoustic center alignment using both drivers, one cone-only and the other tweeter-only-reversed-polarity, playing 2.7khz my intended XO -- and found min/null basically at no offset (a bit tricky to aim both drivers at one ear equidistant). Then I just alligator-clipped a symmetric 2nd-order 0.47mH/6.8uF (XO frequency ~5khz/sqrt(L*C)) independent of respective impedances). Tone-sweep-by-ear shows low hump around 3-4khz (beyond hearing sensitivity curve), not bad. Plays music effortlessly (pleasant to listen to).

Deficiencies: tweeter falls off a bit starting 10khz which is earlier than my "fullrange" drivers even vintage whizzer-less ones. (So) inner detail is only passable. The cone would have contributed massive, widely dispersed very high frequency --breakup resonances -- were it not low-pass filtered. Hmm. Directivity-wise, small but noticeable dip in brightness 10-15deg off-axis vs 0 or 30deg -- maybe I was too close or expecting too much? The waveguide sound-bouncer is hard to fathom. Imaging good but not holographic like a small-diameter whizzer-less fullrange or acoustic-center-aligned 1st-order XO.

So baseline half-hearted diy yielded pretty good mid-fi.... Of course I don't have a real pair of 10X-cost KEF speakers to compare haha. I might try boosting above 10khz by shelving everything below, then tweak the XO phase.
 
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Beats me, though I seriously doubt there's a clone market for such a "unique" driver LS50 Meta 1793 -- unless one included KEF itself as cloning its prototype. Anyway the drivers and packaging look really good in an OEM way.

Rather than going to bed I changed LPF to 3rd-order (0.46mH/6.8uF-0.28mH) and raised the HPF frequency to 6khz (SilverZ 1.5uF/0.47mH); tone-sweep-by-ear essentially flat 500hz to ~10khz. Music much more realistic. Imaging seems better too though I haven't done the phase alignment test (2.7-6khz?).
 
This is off-topic, but, then, so is this thread...
Am interested in upgrading from my Tekton Double Impact speakers mostly because I want to bi-amp with Aleph 30s and, as well, have as large a soundstage as possible for orchestral recordings. The obvious choice is the Ulfbehrt 15 Tektons but communications with Tekton have faltered.
Can anyone suggest an appropriate upgrade? Would prefer to stay close to the $10k range. Am always interested in horn speakers but the Klipsch ones I auditioned had poor bass (especially timbral accuracy). Have recently built the CSS Criton 2TD- MTM kit and the speakers turned out well. Am not equipped to design a set of horn speakers but could build a kit if the case was supplied ala CSS. No longer have a woodworking shop and cannot do table saw-type builds.
The room is fairly large and well-treated. Attached is a current photo. Note that all of the phono, pre, and monoblock amps are DIY (and thank you, 6L6 and RThatcher). The current sound is better than good...
And, have replied to this thread with on-topic content, please see post #19 above, page 1.
Thanks for any suggestions from the knowledgeable speaker pundits who frequent here.
 

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Yes one does need to have a reasonable grounding in the basics of speaker design to recognise what he gets wrong and what he gets right. People new to the hobby are not going to have this though and so it is important that more experienced hobbyists point out that his advice on speaker design is unreliable. People new to the hobby are more likely to spot the snake-oil and the poor value though and require less help on this aspect.

I was tempted to ask how but then wondered if the mods might help you. Prior to youtube he and posters promoting his products were a significant problem for audio forums (e.g. see point 2 here). I've had a quick search and he and his products don't appear to be banned here (?) but the mods are likely to have a pretty low tolerance for discussions that follow the usual trajectory. If you are careful about how you promote him and his products it shouldn't take long before the thread is locked. And then there won't be a bad thing said about

The frustration in this thread could be distilled to the unobtainable concept of objective speaker evaluation. The East German judge awards a 9.7 for a floor routine while the Corsican expert reports a 9.4 while perceiving the same exercise.

Yes, approximated, simulated anechoic near field on axis and off axis measurements of a single speaker can then be extrapolated to measurements and a correlation to experience in an average room with a pair of speakers…..but the East German may still prefer soft violin concertos on her open baffles while the Corsican only listens to Kid Cudi and Daft Punk on planar magnetics….etc etc etc.

Then there’s variances in human ear/brain anatomy and function/defecits/age related changes.

A debate without obtainable objectivity, thus, is similar to judging an Olympic ice skating or gymnastics floor exercise….people will disagree….but we get closer to some truth.
I agree and great humour…Lol
 
So, who exactly are these shrewd industry insiders that supposedly know about Topping and Amir misleading us? Are we here being kept in the dark and lied to like fools for someone else's kicks?

If that's really true, and you know so much about it, then please tell us more so we can stop being played upon as dummies.

Not sure why you brought up Fox News, but since you did, I find it be the only reliable news source there is.
Well your answer is in your own response.
 
Hi Craig159,

I am happy to discuss in a new thread.

So you were looking at bi amp of the Ulfbehrt 15 Tektons? My guess is Eric Alexander wasn’t interested.

I think the Aleph 30 would more than likely have enough power to get those to reasonable levels. The Aleph’s weren’t known for being dynamic into low impedances but they have an elusive mid and top end. I loved my Alephs.

Alternatively perhaps consider one of the newer digital amps using those hi speed fets. They switch at much higher frequencies and the feedback from early adopters is encouraging.

If you’re familiar with and like the Tektron presentation l would stay with it and scale up.
 
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