Jamo Concert 8 in-room measurements

[Ageve]

Danny at GR getting bad Talk Back from many of his viewers

Jamo Concert 8 speaker...... Seems the comments have quite a few questioning how Danny Measures stuff and if this speaker/Tweeter is indeed maybe defective or out of the ordinary. He is getting measurements that do not match some magazine reviews measurements from the time, but is insisting...

www.audiosciencereview.com

After reading this thread, I decided to measure the Concert 8 speaker. Please note that the measurements are done in room. The response below 500 Hz should be ignored.

This Concert 8 speaker was purchased new ~25 years ago. It has never been repaired or modified in any way.

Equipment used:
DAC/pre-amp: Denon AVR-X5200W (direct mode)
Amplifier: Rotel RB-1590
MiniDSP UMIK-2 calibrated microphone
Asus ROG Strix X570 Gaming motherboard (Toslink out).
REW V5.30.1

30cm on axis horizontal (measured between tweeter and midrange):

Psychoacoustic smoothing:

15 deg off axis (horizontal):

15 deg off axis (psychoacoustic smoothing):

30 deg off axis (horizontal):

30 deg off axis (psychoacoustic smoothing):

All measurements above were done between the tweeter and midrange. When moving up to the tweeter axis, the level is increased:

Tweeter axis (psychoacoustic smoothing):

To confirm that the measurements were correct, I measured one of my F208 speakers at tweeter axis (psychoacoustic smoothing):

 

[fpitas]

Thanks. I'm sure everyone is stunned that Danny had no idea what he's doing.

 

[Ken1951]

Thanks. I'm sure everyone is stunned that Danny had no idea what he's doing.

Selling that Snake Oil baby, selling that oil!

 

[fpitas]

I hope my W18s are still doing as well as yours in 10 more years

 

[MAB]

Danny at GR getting bad Talk Back from many of his viewers

Jamo Concert 8 speaker...... Seems the comments have quite a few questioning how Danny Measures stuff and if this speaker/Tweeter is indeed maybe defective or out of the ordinary. He is getting measurements that do not match some magazine reviews measurements from the time, but is insisting...

www.audiosciencereview.com

After reading this thread, I decided to measure the Concert 8 speaker. Please note that the measurements are done in room. The response below 500 Hz should be ignored.

This Concert 8 speaker was purchased new ~25 years ago. It has never been repaired or modified in any way.

Equipment used:
DAC/pre-amp: Denon AVR-X5200W (direct mode)
Amplifier: Rotel RB-1590
MiniDSP UMIK-2 calibrated microphone
Asus ROG Strix X570 Gaming motherboard (Toslink out).
REW V5.30.1

View attachment 338270

30cm on axis horizontal (measured between tweeter and midrange):
View attachment 338260


Psychoacoustic smoothing:
View attachment 338261

15 deg off axis (horizontal):
View attachment 338262

15 deg off axis (psychoacoustic smoothing):
View attachment 338263

30 deg off axis (horizontal):
View attachment 338264

30 deg off axis (psychoacoustic smoothing):
View attachment 338265

All measurements above were done between the tweeter and midrange. When moving up to the tweeter axis, the level is increased:
View attachment 338266

Tweeter axis (psychoacoustic smoothing):
View attachment 338267

To confirm that the measurements were correct, I measured one of my F208 speakers at tweeter axis (psychoacoustic smoothing):
View attachment 338268

Thanks for posting the measurements of your very nice speaker that doesn't need any help from the chop-shop at GR Research.

 

[voodooless]

Nice! But please use decent scaling. You’re showing like 120 dB. Normal is about half of that.

Anything will look ruler flat when zoomed out

Would also be nice to have all the axis in a single plot.

 

[thewas]

I'm sure everyone is stunned that Danny had no idea what he's doing.

I would be rather stunned if one day he would do or say something fully correct.

 

[fpitas]

I would be rather stunned if one day he would do or say something fully correct.

Unless he can turn a tidy profit on that, we may wait a long time.

 

[Ageve]

Nice! But please use decent scaling. You’re showing like 120 dB. Normal is about half of that.

Anything will look ruler flat when zoomed out

Would also be nice to have all the axis in a single plot.

Thanks. Updated graphs:

0, 15 and 30 deg horizontal (1/48 smoothing):

0,15 and 30 deg horizontal (psychoacoustic smooothing):

 

[Ageve]

I did a few extra measurements today.

The frequency response is quite even at 15 deg below the tweeter (30cm distance, with microphone between tweeter and midrange, like in the measurements above).

The level is increased quite a bit when moving up, and at +15 deg there's also a dip at ~2.5 kHz (crossover?).

1/48 smoothing:

Psychoacoustic smoothing:

I also did an extra measurement to make sure that the first ones were correct.

30cm, between tweeter and midrange as before:

My measurements look nothing like the ones Danny Richie did in his first video, but they do match his latest measurements, at least below 9-10 kHz.

First video:

Blue line: My measurement, scaled to match his 25dB range, smoothing and 200Hz limit:

His latest video (red and green are two samples, not the one he measured in his first video):

Blue line: My measurement, scaled to match his 25dB range, smoothing and 200Hz limit:

I just watched the latest video, and now he's back to complaining about steel bolts and sand cast resistors degrading the sound quality. :/

 

[fpitas]

he's back to complaining about steel bolts and sand cast resistors degrading the sound quality.

Without imaginary problems, he can't sell more snake oil. Those are standard audiophile nonsense.

 

[beagleman]

I just watched the latest video, and now he's back to complaining about steel bolts and sand cast resistors degrading the sound quality. :/...

Are you trying to imply they do not degrade the sound??




















(Sarcasm)

 

[fpitas]

Are you trying to imply they do not degrade the sound??




















(Sarcasm)

It's very odd. We've never known Danny to be wrong