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| usage OP negative feedback |
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| 45 rpm vinyle playback |
right channel playback @20.8Hz～2.1Khz
Complex frequency synthesizers produce distorted and crackling sounds.
left channel playback @139Hz～2.1Khz
Complex frequency synthesizers produce distorted and crackling sounds.
 |
| 33 rpm Vinyle playback |
left channel playback @139Hz～2.1Khz
Complex frequency synthesizers produce distorted and crackling sounds.
right channel playback @513Hz～2.1Khz
Complex frequency synthesis sounds normal
upper DAC preamplifier playback vinyle
Complex frequency synthesis sounds normal
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| switch to lower DAC preamplifier playback vinyle |
lower DAC preamplifier playback vinyle
Complex frequency synthesis sounds normal
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| 45rpm 7'' & 33rpm 12'' switch by diff. source |
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| select playback source between technics-sp10 and Garrard 401 |
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| suddenly ...Technics-sp10 turntable not work check no 32VDC |
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| Btw Technics-sp10 power supply connect to turntable the 140V will boster to 260V |
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| record Garrard 401 AC power setting |
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| https://www.stereophile.com/content/emt-128-phono-preamplifier |
Evething since ... the dazzling JPA66 phono preamp
The last WE129A Shenzhen friend ordered ...legend never ever
https://kao211.blogspot.com/2022/05/the-last-we129a-shenzhen-friend-ordered.html
https://www.stereophile.com/content/emt-128-phono-preamplifier-measurements
 |
| viewpoint of amp. flatness (I think the test feed in vinyl sweep signal w RIAA profile) |
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| 30dB@10Hz~500Hz |
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| STD RIAA 20dB@10Hz~500Hz |
Vinyl Phono stage with x10 transformer Amplifier
https://kao211.blogspot.com/2022/04/vinyl-phono-stage-with-x10-transformer.html
Vinyl Phono stage with x10 transformer Amplifier -1 Jfet
https://kao211.blogspot.com/2022/05/vinyl-phono-stage-with-x10-transformer.html
Vinyl Phono stage with x10 transformer Amplifier -2 ...first time playback
https://kao211.blogspot.com/2022/05/inyl-phono-stage-with-x10-transformer.html
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