Why will no other turntable beat the EMT 927?

Regards. Found while researching Pioneer P3. Some may find this interesting:

http://www.head-fi.org/t/338477/high-end-turntable-showdown

Peace.

Yes. Promoting your own products effectively, often includes playing second fiddle. I would arrange the order differently.

Raul,
you may use many different ways to show that you cannot like a turntable you have never listened to, either if you pull the measurement card or comparison with digital or whatever. I strongly recommend to you listening to such a table and come back sharing your impressions, not repeating your speculations all the time.

Regards, Thuchan: "IF you pull the measurement card". This depends on which "deck" one is dealing from.

Would like to find the entire SS review, only able to find pieces here & there.

This one is also interesting:

Stereo Sound #55, summer 1980
Reviews by Fuyuki SEGAWA and Keizo YAMANAKA

TT test by SS is using this special jig for measurement of rumble.
Usually rumble or S/N at turntable is measured as follows (DIN 45539):
1. test record with plain groove (no modulation) and 315Hz modulation groove.
2. play back these grooves with cartridge and compare difference between above outputs after passing prefixed filters
3. and indicate rumble or SN in dB as noise margin.

Above DIN method is internationally accepted and IEC/JIS rumble test are very similar to DIN.
DIN FILTER A (unweighted): more than 35dB is required for minimum quality for equipment
DIN FILTER B (weighted): more than 55db is required for minimum performance of equipment.
Rumble rate measured with DIN B filter is indicated usually in catalogues to show impressive big number of S/N !

But Ladegaard of B&K in 1977 mentioned "At FILTER B the numerical value appears better than FILTER A, but in the territory of SN 65dB it is not something which tells the quality of the turntable. At FILTER A, the numerical SN value looks worse about 20dB, but it is just influenced by the resonance frequency of the cartridge and the arm. Unless the rumble spectrum is analyzed, rumble from the vibration of the motor proper cannot be acertained".
Thus in 1978 Thorens developed new jig for rumble test and applied once on the test of their turntables (1978-1985?).

Depends on when measurements are taken, DIN B procedures enabled Pioneer to elevate S/N from 78dB to 95dB, with what seem minor changes the P3a was launched.

Pursuing research on the Pio. Exclusive, this turns up on The Vintage Knob:

"(So) where does the 78dB > 95dB difference come from ?
I asked him that too because I was exasperated at not being able to explain it based on changes. His answer, translated and redacted, comes out as the following :
"It is 'numbers magic'.
Sometime in the very early 80s, the EIAJ (Electronics Industry Association of Japan) changed their DIN B measurement methodology to, according to the marketers, 'better measure what the ear hears'. They changed something to account for the shape of the human ear.

Left largely unannounced, they 'flattened' the weighted curve, and added another filter, which had the effect of raising S/N ratios by 'about 20dB' depending on the piece of equipment being measured."

I asked him whether they measured anything when tables came in to get repaired. He said that in fact they measure all tables according to that newer "DIN B (EIAJ, A-network) standard because that is the machine they have now.
When I asked how much better the P3a measures vs the P3, he said, "They come out the same : non-statistically-significant sample difference".

The only difference which comes out in testing is a lower speed drift amount : the P3a has a potential speed drift of half the P3 (though when they service the P3, they tune it to P3a control specs).
I then asked whether --- any of the other mega tables which showed such great specs ---, "No, but the whole curve shifted upward for everyone - there was no way to avoid it."

--- the thing to measure to check real rumble differences would be the JIS rumble spec which used continuously from the late 1960s or early 1970s.
In that way you could compare like-for-like across time and manufacturers."

Gotta confess, have never heard an EMT deck, possibly never will, I am giving consideration to the P3. I've an Exclusive PL-70L 11 I occasionally run but (sacrilege) prefer a garage modded JVC 71 for it's ebullient character.

I've no dog in this hunt but do find the conversation fascinating. Thanks for initiating this thread.

Peace,

Dear Timeltel, If you've read that "shoot-out", you should also see that the comparisons were hardly controlled or scientific in any way. Different tonearms and cartridges were used on each tt. Results were largely based on subjective opinion, etc, etc. Notably also, the SP10 Mk3 was not included. For me, the article only showed what was considered TOTL in 1980 (excepting the omission of the Mk3, of course). That said, there is good reason to believe the P3 is indeed a fantastic turntable. Go for it.

Raul, I don't think you can "prove" something sounds good or not good by quoting data of the type you've quoted. For all we know, EMT were unusually honest among manufacturers, such that their specs look worse only because they represent reality more than those of other brands. And I don't think it's fair or accurate to say that "+/-0.15%" means that the error is 0.3%. In fact it equally well means that in come cases the error is 0%, if your glass were half full instead of half empty.