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PostPosted: October 5th, 2018, 12:03 pm 
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Joined: January 15th, 2015, 7:19 am
Posts: 651
Location: Baltimore MD
I'm at RMAF and notice something of interest. I have thought I have heard this before with images wandering around.
In helping setting up the new Larsen 9's I played a track that had a solo male voice. I played it first at 33rpm and quickly notice it should be playing at 45rpm. What is curious the image moved more to the center when I upped the speed
Just wondering what causes this. Is it a crossover problem


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PostPosted: October 5th, 2018, 12:08 pm 
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Joined: February 28th, 2013, 10:38 am
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When you changed the speed, you also changed the frequency content. If you moved the voice from below the crossover to above the crossover, and if the drivers have different radiation patterns, this could result in the image changing. If it moved left<->right, then the frequency response of the two speakers is probably different (which might not necessarily be a speaker problem, but could be due to room interactions).

Roscoe


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PostPosted: October 5th, 2018, 12:56 pm 
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Location: Parkville, Maryland
Roscoe Primrose wrote:
When you changed the speed, you also changed the frequency content. If you moved the voice from below the crossover to above the crossover, and if the drivers have different radiation patterns, this could result in the image changing. If it moved left<->right, then the frequency response of the two speakers is probably different (which might not necessarily be a speaker problem, but could be due to room interactions).

Roscoe



Roscoe nailed it.

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Walt


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PostPosted: October 5th, 2018, 1:16 pm 
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Location: Baltimore MD
Thanks I figured it must be something like that. This was just such noticable thing. We have set up the new Topping Blue Dragon cartridge, which is so detailed that this effect was so obvious. $12k must be good for something. Listening to this cartridge break in was also interesting. It was unsealed yesterday afternoon. Out of the box it was unlistenable. Burned in over night with the Casas buen in record and it actually sounds pretty good.


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PostPosted: October 5th, 2018, 2:21 pm 
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I think it's 12K Euros, more thant $12K. "and it actually sounds pretty good." is pretty faint praise for a cartridge, or darn near anything else audio related, that expensive.


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PostPosted: October 6th, 2018, 9:15 am 
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Joined: January 15th, 2015, 7:19 am
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Location: Baltimore MD
there are a few vendors show the TopWing. Its getting some buzz. Jose has sold two.
Another day of playing and it just gets better.
A MoFi rep dropped by last night and he had a prepress sample of a SRV reissue that will be coming out next year. It was really something. He was impress on how good it sounded on the Larsen 9's with Gamut electronics and cables. I'm still not enthralled with it, and I could never even consider such a purchase even at cost.


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PostPosted: October 6th, 2018, 9:16 am 
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Joined: January 15th, 2015, 7:19 am
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Location: Baltimore MD
Jose (DrVinyl sells it for $12.5k with installation anywhere in lower 48


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PostPosted: October 6th, 2018, 10:53 am 
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Joined: July 17th, 2016, 6:24 am
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Paul,

ESD Acoustics of China has a 5-way all horn system on display. All drivers are field coils. Can you audition it and share your opinion.

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PostPosted: October 6th, 2018, 9:05 pm 
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Joined: January 15th, 2015, 7:19 am
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Location: Baltimore MD
I saw and listened for awhile today. It's an amazing display. I will post photos maybe tomorrow. The outrageousness overwhelmed the possibility of making a definitive evaluation.


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 Post subject: Horney in Denver
PostPosted: October 6th, 2018, 10:26 pm 
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Joined: January 15th, 2015, 7:19 am
Posts: 651
Location: Baltimore MD
here you go:
every driver has its own amp and own PS for the field coil.
cannot even guess what this cost tp produce, ship, and set up


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