check out this old article

awsmone

Well-Known Member
Apr 6, 2014
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Canberra Australia
Have a read of this article quite interesting:
http://www.thevintageknob.org/MISCELLANEOUS/SS1980TT/SS1980TT.html

Lohan

the Sony PSX9 was recently reviewed and remeasured as have the AF1 etc
in HFN review March 2019 issue ; pg 118

-0.0925% Speed accuracy

0.02% wow
0.04% flutter
through spindle rumble -74db !
empty groove rumble - 68db using original mat from 1977 lol

Noise -62.8 dB!

AF1 measured same way

+0.02% Speed accuracy

0.01 % W
0.02 % F
-74.5 dB rumble
-74 dB groove rumble (-70dB w/o vacuum)

Noise - 55.1dB
 

ddk

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May 18, 2013
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Utah
Last edited:

Loheswaran

Well-Known Member
Dec 19, 2014
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I get the impression that it was done by a test records and specs as opposed to an 'ear' test - sadly my Japanese ain't that good
 

ddk

Well-Known Member
May 18, 2013
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995
Utah
I get the impression that it was done by a test records and specs as opposed to an 'ear' test - sadly my Japanese ain't that good

Seems to be a rumble test. My Japanese is nonexistent I only look at the picts :)!

david
 

Loheswaran

Well-Known Member
Dec 19, 2014
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Love it

That said if it were a rumble test alone the 930 won't do that well.

If it were a sound quality test then it would be interesting indeed.
 

ddk

Well-Known Member
May 18, 2013
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995
Utah
Love it

That said if it were a rumble test alone the 930 won't do that well.

If it were a sound quality test then it would be interesting indeed.

Maybe but one of those numbers is for rumble and it scored highest along with the P3.

david
 

microstrip

VIP/Donor
May 30, 2010
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the Sony PSX9 was recently reviewed and remeasured as have the AF1 etc
in HFN review March 2019 issue ; pg 118

-0.0925% Speed accuracy

0.02% wow
0.04% flutter
through spindle rumble -74db !
empty groove rumble - 68db using original mat from 1977 lol

Noise -62.8 dB!

AF1 measured same way

+0.02% Speed accuracy

0.01 % W
0.02 % F
-74.5 dB rumble
-74 dB groove rumble (-70dB w/o vacuum)

Noise - 55.1dB

How is "noise" measured? Sorry, I do not want to wait two years before knowing. :)
 

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