hmscott
Addicted to Fun and Learning
- Joined
- May 17, 2020
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What is the isolation transformer product info? Link?I go farther in my setup, using an audio isolation transformer on the balanced outs of my DAC to the inputs of the preamp.
What improvement does it provide beyond the XLR connection between the DAC and AMP? Do you not have balanced inputs on the preamp?
Speaking of isolation transformers, I also added inexpensive AC power filtering on the D90 MQA / A90 which reduced the noise on the RCA audio, I'd also like to add one of my Tripp Lite AC power isolation transformers from storage - someday.
Before re-cabling and power filtering the RCA line noise was audible on L Gain, it took a several stage approach to solve the noise problem for RCA - power filtering, shielded RCA cables, shielded USB cable with RFI / EMI reducing ferrite cores built-in, and now I'm trying to remove the last of the USB induced noise by using an improved USB output from the PC or a USB isolator / converter.
Unfortunately we don't always have XLR balanced connections available on inexpensive or small portable consumer DAC's, or related equipment in the audio chain.That's a great illustration of how valuable balanced connections can be.
The D90 MQA isn't "inexpensive" at $700 so including XLR connections is "standard", and I'd like to see USB signal isolation and galvanic power isolation "standard" in this price class of DAC's.
The D90 MQA only has two outputs, one balanced XLR and one unbalanced RCA, so if you need more than one audio stream from the D90 MQA you still need to use the RCA output.
Removing the RCA connections, stopping the GPU birdies and other noise riding on the RCA connection improved the audio... I'm listening to the same tracks with KZ ZAX's.
https://tidal.com/browse/album/107167238
Rosetta's not feeding jobs (Covid-19 related), Einstein announced a "find":
"Einstein@Home: The latest Einstein@Home discovery
I'm proud to announce the latest Einstein@Home discovery, which was published today in Astrophysical Journal Letters. This identifies a "black-widow" pulsar in data from the Large Area Telescope on board the Fermi satellite. Our discovery resolves the nature of a mysterious source, first seen two decades ago by the EGRET satellite."
https://einsteinathome.org/content/latest-einsteinhome-discovery
"Einstein@Home: The latest Einstein@Home discovery
I'm proud to announce the latest Einstein@Home discovery, which was published today in Astrophysical Journal Letters. This identifies a "black-widow" pulsar in data from the Large Area Telescope on board the Fermi satellite. Our discovery resolves the nature of a mysterious source, first seen two decades ago by the EGRET satellite."
https://einsteinathome.org/content/latest-einsteinhome-discovery
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