Products > Test Equipment
Audio Analyzers (but not a toy)
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metebalci:

--- Quote from: pope on September 13, 2023, 01:00:35 pm ---
--- Quote from: metebalci on September 13, 2023, 10:24:55 am ---
--- Quote from: pope on September 13, 2023, 08:17:17 am ---
--- Quote from: metebalci on September 12, 2023, 01:27:54 pm ---I also searched for AA options recently. I think the options are roughly:

- cheapish sound card + a free or not expensive software
- qa403 which is quite unique in this space
- expensive sound card/dac + a free or not expensive software
- quite an expensive dac (rme) + virtins mi
- virtins hardware rtx + software
- proper AAs, dscope, ap etc.

Which one to choose depends on various factors and what you want from the software and the hardware. Qa403 looks great for the price, but I never find it in stock. So I went for rme dac and virtins mi (and not only for this purpose, I use the dac for other things as well, I dont need an AA 24/7).

--- End quote ---

AFAIK, virtins hardware rtx has been discontinued long time ago.

--- End quote ---

According to website, rtx6001 is still being sold.

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I really don't think so. There is some possibility it might get produced again but very little as far as I'm concerned. It is on the the website but have you tried to purchase it. I don't think there's an option.

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You have right, I asked to virtins, they said (company) RTX (I didnt know there is another company actually producing it) discontinued it. So an option between DAC+software and proper AA is gone. So there is no option (other than a 2nd hand proper AA) from ~1.5K$ to ~5K$ or so.
arvidb:
Maybe this thread from Audio Science Review could be of interest.

Topping D10s + USB isolator as signal source, E1DA Cosmos ADC for measurement, and REW for processing. Total cost ~€400, and a THD+N better than -110 dB (16 Hz to 22 kHz, 1 kHz fundamental, highest harmonic 3rd at -128 dBc in this particular measurement) seems pretty good to me! A downside is the low input impedance of the Cosmos ADC I guess.

If I'm not mistaken, both the DAC and the ADC have maximum sample rate 384 kHz so a pretty wide bandwidth for audio equipment.
arvidb:
Here's a measurement of my (very recently arrived) Topping D10s + Cosmos ADC (grade B), with a Hifime High-Speed USB isolator "v2" on the ADC.

With better matched levels I could apparently gain another 5-7 dB of THD+N, but the current level of performance will be plenty for my uses anyway so I might not bother to optimize things further.
nenea dani:
Finally, what is the upper frequency limit in this configuration?
harha:
Hi
I use the same setup-but with E1da 9038D6K as generator---just amazing performance..
Hardy
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