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Old 10th September 2014, 08:40 PM   #1
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Default New APx555 Audio Analyser

Audio Precision have launched a new high performance analyser - that they claim to be the best they have ever made - and certainly the finest on the market.

There are some interesting videos on the web site - which are worth a look, detailing some of the design considerations to get THD performance below -120dB.

The All-New APx555 - By Audio Precision
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Old 10th September 2014, 10:21 PM   #2
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Yes I got the announcement too. I was just recently considering to get an APx525. This new one is at least double the price; and I haven't even checked the options.
I could not justify the purchase but I do admire AP's jump ahead of the pack, again!
These guys are very, very good designers, hats off!

Jan
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Old 10th September 2014, 11:25 PM   #3
kevinkr is offline kevinkr  United States
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A few years ago I was offered a 2722 when the start up I had worked for finally went under for the second time..(I did not work for the final incarnation, but remained a close friend to one of the founders) I did not buy it in the interest of maintaining good marital relations, although it was quite a bargain at $12K.. I did enter the AP sweepstakes today, however I am not too worried about having to pay the considerable taxes as I think the odds of winning are pretty low.. LOL
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Old 11th September 2014, 03:34 PM   #4
HpW is offline HpW  Switzerland
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Quote:
Originally Posted by John Audio View Post
There are some interesting videos on the web site - which are worth a look, detailing some of the design considerations to get THD performance below -120dB.

The All-New APx555 - By Audio Precision
Is there any information available of the used ADC..

Hp
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Old 11th September 2014, 03:47 PM   #5
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Quote:
Originally Posted by jan.didden View Post
I could not justify the purchase but I do admire AP's jump ahead of the pack, again!
These guys are very, very good designers, hats off!

Jan
I just noticed the endorsement by someone across the street.
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Old 11th September 2014, 03:52 PM   #6
kevinkr is offline kevinkr  United States
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Regarding the ADC I would suspect it is proprietary and a closely guarded secret at this point in time.. I worked with the original System One and later a 2722, performance was always at least as good as claimed if not better.
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Old 11th September 2014, 03:53 PM   #7
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Originally Posted by scott wurcer View Post
I just noticed the endorsement by someone across the street.
Sorry Scott, that's too cryptic even for me ....

Edit: Ahhh - Eric....

Jan
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Last edited by jan.didden; 11th September 2014 at 04:06 PM.
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Old 11th September 2014, 06:46 PM   #8
KSTR is offline KSTR  Germany
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With the 'bench mode' of the new analyzer AP claim to have kept the SYS2 style of use without the annoying bugs, at least that's what the rep said... that would really too good to be true. SYS2 hardware (incl. 2722) was a masterpiece but the quality of software hardly was any better than 'student level', if at all. It made many people swear and throw things... especially once you've seen how smooth eg the DScopeIII handles its user interface....
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Old 11th September 2014, 07:31 PM   #9
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The datasheet and one of the videos show a FFT plot where apparently the signal has gone through the analog notch filter, yet the fundamental is still seen in original amplitude. That's an interesting feature (although probably in practice not that useful, actually)--I suspect they digitize the signal both before and after the notch filter, then somehow combine them again such that the information close to the fundamental is from before the notch, and everything else from after.

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Is there any information available of the used ADC...
Likely the AD7760, or perhaps the ADS1675.

Samuel
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Old 11th September 2014, 08:48 PM   #10
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...but the quality of software hardly was any better than 'student level', if at all. It made many people swear and throw things...
I love this comment...

Hp
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