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Post by MartinT on Jan 14, 2020 9:15:33 GMT
Interesting. My two ifi iSilencers are still in place. I find the balance ideal and I don't get any dropouts.
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Post by John on Jan 14, 2020 11:01:05 GMT
Perhaps it just goes to show how system dependent it all can be
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Post by MartinT on Jan 14, 2020 11:28:18 GMT
Yes, agreed John.
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Post by mayebaza on Jan 14, 2020 16:41:25 GMT
Yes very true 👍🏿
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Post by julesd68 on Jan 14, 2020 17:03:48 GMT
Not just system dependent but 'ear dependent' - we all listen to music in different levels of detail and all hear different things!
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Post by John on Jan 14, 2020 17:16:34 GMT
Yes we all have different tastes and also have differences in sensory perception But on the whole, what the grounding box is doing is just allowing you to hear the system closer to its potential, as less noise going into the audio chain.
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Post by John on Jan 18, 2020 15:21:18 GMT
Its been a week of playing with grounding boxes I still think basically they allow your equipment to perform closer to its potential as stray DC is no longer into audio chain My other observations are that dealing with stray DC from as many inputs and outputs on the digital devices (Tinkerboard and Topping) going to the same grounding box seems to work better than using separate boxes. Also keeping in jitter reducing devices when using a grounding box is a backward step In terms of what I am hearing is a more natural and realistic sound It's not drastically changing things but allowing you overall signature sound to come to the fore.
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Post by julesd68 on Jan 18, 2020 16:20:46 GMT
Forgive me if this is a stupid question John but if DC is the issue have you tried a DC blocker?
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Post by MartinT on Jan 18, 2020 16:38:40 GMT
It's not stray DC, it's noise on the grouding planes (not chassis earth) of the equipment.
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Post by John on Jan 18, 2020 18:48:41 GMT
I thought it was noise being created inside the unit
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Post by MartinT on Jan 18, 2020 18:55:08 GMT
It is, but noise is not DC.
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Post by John on Jan 18, 2020 19:30:38 GMT
It has to be electrical either DC or AC? If not what is it
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Post by MartinT on Jan 18, 2020 22:02:04 GMT
Noise is noise, either as an AC signal or superimposed on DC. If it's on a ground plane then it's AC.
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Post by julesd68 on Jan 18, 2020 22:08:09 GMT
It's noise Jim, but not as we know it ...
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Post by John on Jan 18, 2020 22:32:13 GMT
Thanks Martin
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Post by SteveC on Jan 19, 2020 8:08:01 GMT
Noise is noise, either as an AC signal or superimposed on DC. If it's on a ground plane then it's AC. High frequency noise in the form of spurious RFI/EMI. DC noise would presumably be lower in frequency, as in 50Hz hum.
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Post by MartinT on Jan 19, 2020 9:05:49 GMT
I think you guys need to learn your DC from your AC. Direct Current goes in one direction only. Alternating Current goes backwards and forwards around a zero point. Noise can be superimposed over either AC or DC. Noise can have a frequency or frequencies or be entirely random. DC cannot have a frequency.
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Post by Firebottle on Jan 19, 2020 9:27:08 GMT
Also remember folks that we are talking about AC at enormous bandwidth compared to the audio signal. That is the real plus of the grounding boxes in that they work over a huge range of frequencies. A lay person probably finds it difficult to envisage how much RF (radio frequency) crap there is about. If we could see all the RF we would be swimming in it and a lot gets into our equipment apart from the high frequency harmonics generated internally.
It ascending order of frequency there is AM radio, short wave radio, all sorts of military comms, FM radio, DAB, TV broadcasts, airport radar, mobile phone networks, wi-fi, microwave links, more mobile networks, more radar, more microwave links and so on up the scale.
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Post by mayebaza on Jan 19, 2020 16:18:37 GMT
Speaking of RFI, we often fail to consider the growing widespread use of Bluetooth enabled devices in the last few years. Even if the Bluetooth is switched off, there is some residual transmission if the unit is in use. This must have some increasing effect on our equipment which contribute to grounding boxes effectiveness.
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Post by MartinT on Jan 19, 2020 16:34:38 GMT
TV & radio broadcasts, CB radio, 3G/4G/5G mobile, satellite, wi-fi, Bluetooth and other stuff all permeate our airwaves now. Our systems are attacked by all manner of crap and it's little wonder that mains treatment, shielding and grounding boxes are all effective at improving performance.
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