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| purchase new one |
usage 6922 ～6JM6 SE amplifier drive left speaker
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| left 6JM6～right 211 amplifier |
verify DAC switch to Vinyl RIAA profile
change another DAC verify Vinyl RIAA profile playback
2025年12月25日 星期四
2025年12月21日 星期日
Jukeboxs AMI H200 amp. rectify tube 6z4 change
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| before |
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| after |
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| AMI H200 amp. |
YT Shorts media upload the volume gain is bigger than blog upload
Louis Armstrong vocal "'Twas the Night Before Christmas"
https://www.youtube.com/watch?v=9df5v2HiaWc
https://www.youtube.com/watch?v=cmt2TZWGoO8
2025年12月9日 星期二
re-edit 頻率響應是不是唯一的東西........................................ recalled the struggle of The speakers making by hand just for good sound article
everything start from here...since 2013
頻率響應是不是唯一的東西
譯...Ultraudio Frequency Response Isn’t the Only Thing
http://www.ultraaudio.com/opinion/20100501.htm
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| the choice of crossover topology |
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| the fs of woofer choice |
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| the imp. profile of 15'' woofer (exp.) |
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| the impedance of 15'' woofer match example |
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| woofer Impedance matching conjugate example |
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| Impedance xcover profile of 8 ohm mid horn driver |
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| Impedance xcover profile of 16 ohm mid horn driver |
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| mid horn Impedance value deceive by how many driver cascade |
2025年12月7日 星期日
purchase wrong tube socket of big 12 pin
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| socket pin grap force too weak |
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| for 6jm6 size too big |
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| Dim. record |
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| recived ...shipping from China |
DAC rectify tube 6z4 change to 6x4 ~2
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| drill slot because double trace layout |
playback -1 ...before
playback -2 ...before
playback -3 My all ...before
Mariah Carey wesome
playback -4 ...before
playback -5 ...before
2025年12月4日 星期四
rectify tube 6z4 change to 6x4
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| 6x4 raytheon |
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| tube amp. DAC w 6z4....coffee shop |
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| https://kao211.blogspot.com/2023/07/jukeboxss-audio-amplifier-modify-volume.html |
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| before tube Tung-Sol 6x4 replaced rectify tube by 6x4 raytheon sound more nature ~ more detail |
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| low noise amp. w 6x4 raytheon inside |
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