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Digital Drive Upsamplers, DACs, jitter, shakes and analogue withdrawals, this is it. |
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Digital Drive Upsamplers, DACs, jitter, shakes and analogue withdrawals, this is it. |
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In Reply to: RE: so you don't know how to isolate the quiet side from noisy side? posted by Dawnrazor on April 24, 2025 at 11:36:58:
1. Let's examine equipment grounding for components like amplifiers, preamplifiers, and DACs. When a power cord's ground is directly connected to the equipment signal ground and RCA interconnects are used, a portion of the audio signal can inadvertently travel through the power cord's ground conductor. Due to the power cord's typically lower impedance compared to the interconnect cables, a significant portion of the signal current may take this path. For instance, with a $1000 silver interconnect, potentially 50% of the signal could be shunted through the power cord, effectively meaning you're hearing a significant contribution from the power cord. A similar issue arises with SPDIF signals, where noise on the power cord's ground can contaminate the digital data. To mitigate this, inserting diodes or a 10-ohm resistor between the equipment ground and the power cord's ground can help. This approach aims to maintain safety while impeding signal and noise propagation through the power cord.
2. For SPDIF data signal isolation, fiber optic connections inherently provide it. However, with coaxial connections, a pulse isolation transformer is necessary, as previously discussed in my thread regarding the Tascam CD-200 and Cambridge CXC modifications. The transformer's secondary coil must be AC/DC isolated from the output equipment (streamer or CD transport).
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Follow Ups
- grounding and isolation - Leo loves music 17:55:22 04/24/25 (16)
- RE: grounding and isolation - Dawnrazor 11:55:33 04/25/25 (14)
- RE: grounding and isolation - AbeCollins 13:57:17 04/25/25 (13)
- Updated - Dawnrazor 14:45:31 04/25/25 (0)
- There is more to transmitted noise - E-Stat 14:24:56 04/25/25 (11)
- RE: There is more to transmitted noise - AbeCollins 22:45:05 04/25/25 (3)
- Indeed - E-Stat 06:46:51 04/26/25 (0)
- RE: There is more to transmitted noise - Dawnrazor 01:50:55 04/26/25 (1)
- RE: There is more to transmitted noise - AbeCollins 08:01:49 04/26/25 (0)
- RE: There is more to transmitted noise - Dawnrazor 14:55:22 04/25/25 (6)
- In that respect - E-Stat 15:21:48 04/25/25 (5)
- RE: In that respect - AbeCollins 22:51:37 04/25/25 (2)
- RE: In that respect - Dawnrazor 02:01:54 04/26/25 (1)
- RE: In that respect - AbeCollins 08:21:07 04/26/25 (0)
- RE: In that respect - Dawnrazor 16:16:40 04/25/25 (1)
- RE: In that respect - E-Stat 16:20:40 04/25/25 (0)
- RE: grounding and isolation - AbeCollins 07:56:59 04/25/25 (0)
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