You had different SOME arms and cartridges on the two tables, not to mention a stock arm on the Yamaha. How is it possible to know you're only hearing the tables?
Focusing on the main rivals, ORIGINAL SL-1200 and Rega Planar 3 we have:
1)exactly the same cartridge
2)An improved arm, of the same manufacturer, on the Rega.
Is this enough to cover the, supposed, inferiority of direct drive player of '70s?
All these myths, produced for decades, against D.D. players, are a mater of better arms on belt drive tables?
And if so, why, on a direct comparison, the direct drive with the same cartridge and with inferior arm sounds so better, (other things being equal)?
And, in any case, where is the "cogging" effect?
Is it covered by a magic, unknown, quality of SME II?
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The reviewer was amazed from the unexpected results, also, and tried to check what is going on, making all the necessary adjustments, equalizations:
" I happened to have my audio measurement gear set up for the receiver comparison test Sauck and I had put together that same week, so I used it to make sure there wasn't anything technically amiss with any of the turntables.
I was particularly curious to see if there was a measurable bass boost in the Technics SL-120.
So I ran some test records from Sauck's extensive collection, then analyzed the results.
I didn't find much. In fact, what little I found didn't correspond well with the listening test results.
The Rega Planar 3 produced, overall, the flattest frequency response; it was dead even down to 30 Hz.
The Technics Sl-120 was down -1.64 dB at 30 Hz, while the Yamaha YP-701was down -1.91 dB.
Obviously, none of this could explain the Technics' superior bass.
The Rega also had a flatter treble response, and in fact it even showed a slight boost at very high frequencies: up +1.4 dB at 10 kHz, while the Technics was down -1.88 dB and the Yamaha was down -2.47 dB.
I suppose the Rega's superior treble response might have had the subjective effect of making the tonal balance sound thin.
That still wouldn't explain the Technics' awesome bass, though."
And
"But it wasn't just the bass-the SL-120 also had a warmer, more natural tonal balance than the other turntables."