Audio Precision's New APx517B Acoustic Analyzer
Dec 10, 2020 at 12:52 PM Thread Starter Post #1 of 6
If you're interested in doing headphone measurements (either in a lab for work or as an enthusiast), Audio Precision's new APx517B acoustic analyzer is an ideal solution. It's also an excellent measurement setup for those engineers who are now spending a lot more time working from home, as it's far more affordable -- and more compact -- than other high-end audio analyzers.

Here's Dan Knighten* from Audio Precision demonstrating how easy it is to set up the APx517B straight from its box to measuring headphones -- literally just a few minutes of setup.



Known for their state-of-the-art audio analyzers, Audio Precision recently announced the new Audio Precision APx517B Acoustic Analyzer which is specifically designed, configured, and built for the production-line testing of speakers, microphones, headsets, the wide range of consumer electronics incorporating speakers and microphones, and (most significantly to this community) headphones.

While the APx517B is optimized for fast setup and reconfiguration for production line use, it is also a perfect analyzer for those doing headphone research and development, as well as for headphone measurement enthusiasts. The APx517B combines an Audio Precision analyzer for signal generation and acquisition, a headphone amplifier, and a microphone power supply, and optional Bluetooth capabilities, all in a single chassis.

Audio Precision - APx517B Acoustic Analyzer.png

The APx517B also measures impedance using the Kelvin measurement technique which subtracts the resistance effects of the cable itself and inaccuracies caused by the less-than-ideal source impedance in a power amplifier, for more accurate impedance measurements.

Audio Precision says that it should be operationally inaudible in a typical office environment with its thermostatically controlled fans, which you'd also understand as a big deal if you've worked around audio analyzers.


Audio Precision - APx517B Acoustic Analyzer - Headphone Test.jpg

And here's Dan Knighten again, this time showing a Bluetooth headphone test setup (below):



You can find out more at Audio Precision's website at https://www.ap.com/apx517-new-analyzer/

*
Dan Knighten is the Product Line General Manager at Audio Precision. Dan Knighten and Dan Foley of Audio Precision have been measurement mentors for us at Head-Fi, both of them possessing encyclopedic knowledge of audio test and measurement.
 
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Dec 10, 2020 at 2:40 PM Post #2 of 6
How quietly this thing performs should not be underestimated! Makes our jobs a whole lot easier!
 
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Dec 11, 2020 at 1:11 AM Post #3 of 6
Looks like $6K from what I can find online, that's certainly more affordable than many other systems out there, though there's still a huge gap between the MiniDSP EARS and anything else, though this appears to have a great many more features than the EARS does.
 
Dec 12, 2020 at 11:12 AM Post #4 of 6
Looks like $6K from what I can find online, that's certainly more affordable than many other systems out there, though there's still a huge gap between the MiniDSP EARS and anything else, though this appears to have a great many more features than the EARS does.

For $6K you are getting only the APx517B box, nothing else. A KEMAR 45BB head/torso + a GRAS 43AG Ear and cheek silmulator that you see in the video would add another ~$14K...
 
Dec 12, 2020 at 7:39 PM Post #5 of 6
For $6K you are getting only the APx517B box, nothing else. A KEMAR 45BB head/torso + a GRAS 43AG Ear and cheek silmulator that you see in the video would add another ~$14K...

Many engineers I know have the coupler(s) but not a dedicated analyzer. The APx517B contains lab-grade amplifiers (for driving loudspeakers and headphones) and the Audio Precision analyzer in a single chassis for that price (and with accredited ISO/IEC 17025 calibration). I think many in the trade will readily understand the value therein.

For those not familiar with what's required to measure headphones, as @DarKu is suggesting, there is another thing or two one will need in addition to the analyzer to do headphone measurements (thankfully, with the APx517B, an amplifier is not one of them :beyersmile:).
 
Dec 12, 2020 at 9:18 PM Post #6 of 6
Many engineers I know have the coupler(s) but not a dedicated analyzer. The APx517B contains lab-grade amplifiers (for driving loudspeakers and headphones) and the Audio Precision analyzer in a single chassis for that price (and with accredited ISO/IEC 17025 calibration). I think many in the trade will readily understand the value therein.

For those not familiar with what's required to measure headphones, as @DarKu is suggesting, there is another thing or two one will need in addition to the analyzer to do headphone measurements (thankfully, with the APx517B, an amplifier is not one of them :beyersmile:).

That's cool, it sounds like it could be a really nice product for bigger review sites with the ad income to support the purchase or for headphone manufacturers looking to get into a measurement-based development model.

With the additional costs it seems a bit prohibitive for all but the most well-heeled of enthusiasts however.
 

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