QuantAsylum QA403 Audio Analyzer first look
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- Опубликовано: 21 фев 2024
- Finally got my hands on one of these as they have been had to come by due to stock issues. This video is an overview of the of the unit.
QuantAsylum site: quantasylum.com/
Support this channel on Patreon www.patreon.com/user?u=12254451
Email: johnaudiotech@gmail.com
Thank You! 
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A BIG Thank You to my Patreon supporters. You made the purchase of this gear possible! It is priced fair for what it is, but $600 is a stretch for me.
Nice John! I’m glad you could get this! I just got mine but have had too much going on to show it. I have big plans for it:) It will be fun to see you use it!!
Thanks Eddie! I've been playing around with it learning more about it. Pretty capable bit of kit.
The time has come to see real measurements for JAT-501. Mixed feelings because I was used to see and hear about the " 1% pilot signal distortion". I'm glad with your glad John
Didn’t know I needed one of these, but I probably want one for my upcoming 60th birthday. Thanks for the review!
You can find out if all those hifi myths are true regarding expensive cables, resistors, capacitors and all the other stuff people buy.
Haven’t been on your channel in a while and very excited for this piece of tech. I’ve watched you for several years now and you’ve talked a lot about this upgrade. Glad you finally have it. Now you can go back and re-measure everything! Just joking but am looking forward to seeing it at work.
This is something I will probably never have, but it's so good to learn something new. Thanks a lot for your videos!
What an awesome piece of kit. I feel a whole bunch of previous built and tested amp kit retests coming. Again awesome!
I will be excited to see what is coming with this new kit! Awesome Sauce!
So awesome people like you and others who know what they are talking about with this kit are doing videos I am thinking of dusting off my piggy bank and start filling it again. Please do a proper look at the specs of a JAT501 and fiddle about with stuff ! nice one John.....cheers.
Looking forward to seeing it hooked up to your amplifiers !
Hey John! Glad you got it! Let me know if you need that USB power insert board and data pass through board I made. Helps a lot with mine.
input gnd and usb gnd are isolated, so if you want to remove that 60hz ripple you can connect input and usb grounds together and that should ground the circuit
Nice. I've been muddling along with the Lossless Audio Checker and SPEK.
I got mine last week. I'm learning how to capture the THD harmonics as a bar graph, that is most useful for me. The frequency response curve of course too. And power vs. THD would be helpful too in my Amp building. It would be great to see one video dedicated per function of this unit, with wiring, and what buttons to push etc. It can be a bit complicated.
Test the JAT501 & JAT801 THD soon
Just a thought: If you ever needed to use your “Feel Tech” sig gen, take that %THD away from the Amp's output %THD - there might even be an offset facility within QA403, great bit of kit, but way too expensive for me.
very good point i understand that cheap generators have high distortion ? i cant find the value in the specs
This is weird a very important point
You need a small tripod. I'm sure you already know this. 😂
I look forward to seeing some frequency response stuff. I wonder what the highest frequency this thing can handle is? I think 24 bit/192kHz .flacs save everything, I've seen up to 30 kHz in some of them, according to SPEK.
Using BNC connectors for audio is unique
much better than rca The silly thing is that they use rca also for spdif cable Unbelievable Why not using a standard already tested with digital scopes i really cant understand
Great! For $600 it is quite a bargain. I don't know if you are aware how much Audio Precision is asking for their products.
Very good thanks
Nice toy!!!
I've thought of this unit. But I need more than just THD, I need to know the level of each individual harmonic, 2nd, 3rd, 4th and 5th. Amplifiers might have low THD but they sound bad because its all 3rd harmonic distortion. And an amplifier with 1% 2nd harmonic distortion will sound better, even with the high 2nd harmonic distortion. Higher distortion at the even harmonics are musical, but even a small amount of odd harmonic distortion is dissonant. Can this unit graph out the individual harmonics? Or is it still limited to only doing THD?
He showed how you can label arbitrary frequencies. Also the software provides an API through http (a bit wierd tbh) so you can grab all the data you want for processing in your favourite language.
The QA40x Software has a feature built in which is called THD Bargraph Visualiser. It shows you all the harmonic in a bar graph, with the dB volumes of each harmonic
Amp builders both hifi and for guitar would surely be interested in that demo! Thanks.@@dedondigital
An interesting device, but...
"Note: The software uses a proprietary link to the hardware. You don't need to install a driver, but be aware the hardware will not work with other software applications. The benefits of the proprietary link are numerous. But the biggest win is that we can guarantee a bit-exact communication link that is immune from hidden sample rate conversions and bit depth changes common with UAC devices. "
Not quite a deal-breaker, but that's pretty bad, and that "biggest win" bit is an outright lie.
I know about those Union Aerospace Corporation devices.
What's pretty bad about that? Once you have it hooked up to their FREE software, you can program the OPEN SOURCE Tractor to make it do whatever else you need it to do... what am I missing that you wanted to do with it?
@@sonovoxxSome people are desperate to find anything they can to whine about.
@@ferrumignis Audio guys are particularly miserable.
@@jakubczajka4275 If I'd been suckered into buying a solid silver power or speaker cable for thousands of dollars I'd be a bit miserable too 😄