GR Research Speaker Upgrade Review (Sierra-2EX V2) [Video]

[tineared]

Naturally, Danny has deleted dozens of comments on his videos from the past 24 hours.

Likely his new full-time job

 

[phoenixdogfan]

Great job, Amir.

I think Danny and his ilk market to the segment of buyers who have no real understanding but believe there is some secret core of 'forbidden knowledge' that "they don't want you to know". These are the core market for quack medicine, conspiracy theories, and all the hare-brained stuff we see in the tabloids they sell in the check out lane at the supermarket. Unfortunately, believe it or not, educating these folks in the facts doesn't change their minds about anything: Cognitive research indicates it actually strengthens their beliefs. It causes them to double down on their faith because those beliefs have actually become part of their very identity, and truth actually produces a "cognitive dissonance" which is simply to painful for them to accept.

So, if anything, this review will actually help Danny with his "true believers" who will see this as a personal attack on who they are. They will feel persecuted you can count on that.

 

[Endibol]

I just visited the GR Research site for the first time.. I was shocked to see that Danny even offers upgrade kits for Revel speakers, not exactly known for mediocre frequency response and bad quality I think we all agree on.
Someone said it before: Danny is a charlatan!

 

[Power Pop 23]

I don't follow the market for modifying loudspeakers and have no idea whether GR Research can afford a $150K Klippel NFS.

IF I was in the business of selling modifications for loudspeakers, I would consider piggybacking on the measurements at ASR and Erin's Audio Corner to identify loudspeakers worthy of modification.

 

[Andysu]

@amirm open the speaker up connect the test gear to the each terminals crossover do frequency sweep see what the graphs look like overlays

 

[daniboun]

Naturally, Danny has deleted dozens of comments on his videos from the past 24 hours.

It must be said that the truth is not always easy to hear...

 

[Power Pop 23]

For those ASR members who prefer to modify their loudspeakers first, before applying any EQ.....

Perhaps Tested Audio dot com could collaborate with ASR members to determine a 'bag of parts' offering a meaningful upgrade in performance for select loudspeakers measured at ASR.

 

[Power Pop 23]

Likely his new full-time job

I have no idea, but I wonder if a profitable Internet influencer now deploys A.I. for this task

 

[daniboun]

Great job, Amir.

I think Danny and his ilk market to the segment of buyers who have no real understanding but believe there is some secret core of 'forbidden knowledge' that "they don't want you to know". These are the core market for quack medicine, conspiracy theories, and all the hare-brained stuff we see in the tabloids they sell in the check out lane at the supermarket. Unfortunately, believe it or not, educating these folks in the facts doesn't change their minds about anything: Cognitive research indicates it actually strengthens their beliefs. It causes them to double down on their faith because those beliefs have actually become part of their very identity, and truth actually produces a "cognitive dissonance" which is simply to painful for them to accept.

So, if anything, this review will actually help Danny with his "true believers" who will see this as a personal attack on who they are. They will feel persecuted you can count on that.

That's exactly what blasphemy provokes in an indoctrinated believer... In any case, it should help Danny reduce his cognitive dissonance.
It's still crazy to have to admit that some audiophiles are so naive that they swallow everything they're told without wanting to look for contrast or contradiction....

 

[Ageve]

Danny just posted a new video. It's not a reply to this one*, but he once again tries to mislead his viewers about what the Klippel NFS does (or he just doesn't understand).

First, he shows the on-axis response from Erin's review, and then he says:

Another thing that I want to point out too, when you're measuring something with a Klippel, that microphone is moving all around, and it's taking a whole bunch of measurements, and then it creates an average, so it's taking a lot of measurements into account, and kind of creates a mean average across there, whereas when I'm taking a measurement, I'm getting an exact measurement, at the point that I'm taking the measurement. So sometimes that can cause things to look a little different.

As if that wasn't dumb enough, he then says:

If you look at the measurements there, that Erin took, you'll see up top, you'll see some peaks up there, that I don't show. I don't show those peaks there at all. So keep in mind, I'm showing an actual response at this point. It's taking an average of a bunch of measurements, so which... that tells me, there's probably some things going on in the off-axis that it's picking up, and it's averaging in.

This is his measurement, compared with Erin's:

The same measurements, but with 1/3 smoothing applied to Erin's...

*JBL L100 MKII video

 

[amirm]

He has been saying that a number of times. I mentioned that in my video.

 

[Randolf]

Danny just posted a new video. It's not a reply to this one*, but he once again tries to mislead his viewers about what the Klippel NFS does (or he just doesn't understand).

First, he shows the on-axis response from Erin's review, and then he says:

Another thing that I want to point out too, when you're measuring something with a Klippel, that microphone is moving all around, and it's taking a whole bunch of measurements, and then it creates an average, so it's taking a lot of measurements into account, and kind of creates a mean average across there, whereas when I'm taking a measurement, I'm getting an exact measurement, at the point that I'm taking the measurement. So sometimes that can cause things to look a little different.

As if that wasn't dumb enough, he then says:

If you look at the measurements there, that Erin took, you'll see up top, you'll see some peaks up there, that I don't show. I don't show those peaks there at all. So keep in mind, I'm showing an actual response at this point. It's taking an average of a bunch of measurements, so which... that tells me, there's probably some things going on in the off-axis that it's picking up, and it's averaging in.

I just have also seen Danny's JBL L100 video and also stumbeled about his "Klippel averaging story" while refering to On Axis and Listining Window graph of Erin's Klippel measurment. He simply doesn't seem to understand that the On Axis response measured by the Klippel NFS is not averaged in any way and is in fact a extremly accurate high resolution measurement, which you otherwise can at best get from an ungated outdoor or anechoic chamber measurement and that instead it is his own time gated and 1/3 smoothed measurement which is degraded and low resolution. I am not sure if Danny didn't understand this or is intentionally trying to compromise the Klippel measurements.

 

[Randolf]

BTW, some of Danny's sometimes strange high frequency measurement results could perhaps be caused by the massive 1/3 smoothing and the particular smoothing algorithm used. In 2024 I had an interisting discusion with John Mulcahy (REW) because my FreqRespGraph smoothing looked a little bit different to REW:

REW graph smoothing algorithm

I have created a tiny command line frequency response display and comparison tool "FreqRespGraph" on github. It can also smooth curves using a Savitzky-Golay filter. However the results look rather different to REW results, which uses a IIR filter based approach: I need about twice the...

www.avnirvana.com

In REW massive smoothing (1/1 octave) can look a liitle bit like a elevated response at the frequency high and low boundaries, e.g.:

 

[phoenixdogfan]

I just visited the GR Research site for the first time.. I was shocked to see that Danny even offers upgrade kits for Revel speakers, not exactly known for mediocre frequency response and bad quality I think we all agree on.
Someone said it before: Danny is a charlatan!

Surprised he's not offering kits for the Blade Metas, the D & D 8c's. Kii 3's, 83xx's, Salon 2's, and the C8C's.

 

[testp]

for future this is really easy to avoid, GR should use -> hexa_octa_star_quad head screws, then no one can open it in the first place

 

[SoySalsaPicante]

Surprised he's not offering kits for the Blade Metas, the D & D 8c's. Kii 3's, 83xx's, Salon 2's, and the C8C's.

He makes a kit for MoFi SourcePoint 8; I took one look at (his crappy) before & after graphs and noped the hell outta his site.

 

[Endibol]

I am not sure if Danny didn't understand this or is intentionally trying to compromise the Klippel measurements

Either way, he is misleading his audience.

 

[Adis]

Surprised he's not offering kits for the Blade Metas, the D & D 8c's. Kii 3's, 83xx's, Salon 2's, and the C8C's.

Don't give him ideas...

 

[amirm]

Surprised he's not offering kits for the Blade Metas, the D & D 8c's. Kii 3's, 83xx's, Salon 2's, and the C8C's.

First thing he would do is convert them to passive speakers as he once did (ATC?). After all, you can't sell crossover "parts" for an active speaker!

 

[dfuller]

First thing he would do is convert them to passive speakers as he once did (ATC?). After all, you can't sell crossover "parts" for an active speaker!

Dynaudio BM15A, I think? And yeah, he made a mess of things with it, it's one of the less screwy Dyns.