check out this old article

awsmone

Active Member
Apr 7, 2014
1,061
2
38
Canberra Australia
#2
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

Industry Expert
May 19, 2013
3,447
6
38
Utah
#3
Last edited:
Dec 20, 2014
201
1
18
#4
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

Industry Expert
May 19, 2013
3,447
6
38
Utah
#5
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
 
Dec 20, 2014
201
1
18
#6
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

Industry Expert
May 19, 2013
3,447
6
38
Utah
#7
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
 
May 30, 2010
13,958
34
48
Portugal
#8
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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