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Type: Posts; User: DavidPiska
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June 1, 2021, 06:53 AM
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Re: Power grid interference: What does it look like measured with different tools?
A filter suppresses high frequency interference that comes from the power grid. The vast majority of audio components rely only on a simple transformer in the source section. However, due to its...
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May 19, 2021, 12:00 PM
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Power grid interference: What does it look like measured with different tools?
If you're interested to see what power grid interference looks like, take a look at the videos below, or a comprehensive article about it here: F4SX Audio Power Filter - RDacoustic.cz (explains in...
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November 27, 2019, 03:05 AM
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Re: Measuring Power Grid Interference in Practice
Of course, you can measure excellent output parameters with laboratory cleaned power in laboratory. But if you have big EMI noise at home, you will have the same noise in the output. This is about...
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November 25, 2019, 09:53 AM
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Measuring Power Grid Interference in Practice
We measured the high frequency noise in the power grid. The voltage going to the measuring kit is conducted by a common EURO cable and the RD Power Filter in order to compare their efficiency. I have...
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February 16, 2018, 05:13 AM
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Have we got used to bad recording or no?
It will be nearly 9 years when Ian Shepherd announce a Day of dynamic range (http://dynamicrangeday.co.uk). Did something change?
Why do I feel that nobody cares about this issue? Do recordings... -
January 26, 2017, 03:37 AM
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Euphoria High End speakers - RDacoustic
link
High End speakers Euphoria in version stereo 2.0, which have the option to be upgraded to a surround 7.1 or surround 5.1. A unique one and a quarter-band structure is using the ideal... -
January 26, 2017, 03:36 AM
Thread: Acoustic Room Treatments vs DSP
by DavidPiska- Replies
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Re: Acoustic Room Treatments vs DSP
In my opinion, digital processing doing phase shift and it is worse than bad acoustic. Sound looses details and spatiality. Best sound is from single A class tube amplifier and good horn speakers...
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January 26, 2017, 03:31 AM
Thread: Jupiter Copper Caps
by DavidPiska- Replies
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Re: Jupiter Copper Caps
They are good, but no as Delund.
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January 26, 2017, 03:30 AM
Thread: New Preamp
by DavidPiska- Replies
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Re: New Preamp
good work
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January 26, 2017, 03:26 AM
Thread: Acoustic Diffuser QRD67
by DavidPiska- Replies
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Re: Acoustic Diffuser QRD67
The best thing is to place diffusor with inverse pattern opposite first one, to the rear wall.
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January 26, 2017, 03:17 AM
Thread: Acoustic Diffuser QRD67
by DavidPiska- Replies
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Acoustic Diffuser QRD67
link to acoustic diffuser
The use of diffusor has got similar diffusion effect, as if a sandblasted milk glass is placed in front of light beam from a torch. The glass evenly diffuse the light... -
January 25, 2017, 07:47 AM
Thread: Diffuse vs Dampen/eliminated
by DavidPiska- Replies
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re: Diffuse vs Dampen/eliminated
Balanced between diffusion and dumping is very important, but we must not forget to room dimension as well. Square is not good, better is rectangle, wall distanc shell not be in multiplications.
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January 25, 2017, 07:42 AM
Thread: My DIY speakers (for my HT system)
by DavidPiska- Replies
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Re: My DIY speakers (for my HT system)
have you listened full range speakers without crossovers?
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January 25, 2017, 07:40 AM
Thread: diy audio rack
by DavidPiska- Replies
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Re: diy audio rack
not bad
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January 25, 2017, 07:36 AM
Thread: DIY Power Cable
by DavidPiska- Replies
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Re: DIY Power Cable
Hi, I think that power cable is insignificat regarding solution of power supply of the audio components. Every audio component should have internal EMC filters. It depends on its quality not on power...
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January 25, 2017, 07:30 AM
Thread: hello
by DavidPiska- Replies
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hello
:rolleyes:
Yes...it makes for a BIG improvement. Every demo I've heard where at Altaira was in the system, folks listened, and then the Altaira(s) were removed, and folks immediately demanded the Altaira be put...
Altaira or Gemini CGS on...