AP - The Recognized Standard In Audio Test

APx58x Series Audio AnalyzersHOME/PRODUCTS/APx SERIES/APx58x Series

8- and 16-Channel Modular
Audio Analyzers

Channel count meets broad range of digital I/O for
simultaneous, multi-channel audio test.


The APx585 is a true multichannel audio analyzer, with 8 simultaneous analog outputs and inputs. It is ideal for designing and testing consumer devices such as home theatre receivers or pro devices such as mixing consoles. The APx586 adds a second input module for 16 simultaneous analog input channels.

The APx582 offers the same 8 channels of analog input as the APx585 in combination with 2 channels of analog output. The APx582 includes the AG52 option for perfect square waves.

All models have up to 216k digital inputs and outputs via AES/EBU, TOSLINK and SPDIF. Additionally, I/O may be expanded with optional Digital Serial, HDMI with ARC, PDM and Bluetooth modules.

No other audio analyzer is faster or easier to use for multichannel audio.

  • Super fast testing of a wide range of multichannel devices
  • Measure one-to-many or many-to-one crosstalk & phase across all channels
  • Measure maximum power across all channels over time
  • Supports switchers for 192 maximum channel capacity

Multichannel audio requires multichannel analysis

A true multichannel analyzer allows not just faster testing, but also a complete picture of the performance of all of a device’s input and output channels simultaneously.

Today, the majority of A/V receivers, disc players, TVs, PCs and automotive audio devices have more than two channels, from six channels (5.1) in surround sound applications to 16 or more channels in many cars. The conventional solution for testing multiple channels with a two channel analyzer has been to use switchers.

Such an approach has two major problems. First, even when automated, switching between channels is slow. Second, because only one or two channels are being observed at a time, designers and manufacturers are often blind to interactions between channels. Problems which may go unobserved include output sag in channels during full power output tests as well as phase and crosstalk interactions, particularly the combinatorial complexity of all the output channels interacting with each other.


What others are saying

“AP has burst onto the scene with the easiest Audio Analyzer to use but they took it up a notch by also making it the most powerful. I’ve got my cake and I am eating it too!”

Gene DellaSala | Audioholics

Ideal for testing

APx582, APx585 and APx586 are designed for multichannel applications.

  • Automotive head units
  • Dolby compliance testing
  • DTS compliance testing
  • Multichannel Converters
  • Multichannel power amps
  • Multichannel receivers


    Download full specifications

  • Sine Frequency Range
    5 Hz to 80.1 kHz
  • Frequency Accuracy
    3 ppm
  • IMD Test Signals
  • Maximum Amplitude (balanced)
    14.4 Vrms
  • Amplitude Accuracy
    ±0.05 dB
  • Flatness (20 Hz–20 kHz)
    ±0.008 dB
  • Residual THD+N (20 kHz BW)
    –103 dB + 1.4 µV
  • Analog Output Configurations
    unbalanced & balanced
  • Digital Output Sampling Rate
    27 kS/s to 200 kS/s
    27 kS/s to 108 kS/s Optical
  • Dolby / DTS Generator
    Yes (encoded file)
  • Maximum Rated Input Voltage
    160 Vpk
  • Maximum Bandwidth
    1 to 16 channels of analog input 90 kHz
  • IMD Measurement Capability
  • Amplitude Accuracy (1 kHz)
    ±0.05 dB
  • Amplitude Flatness (20 Hz–20 kHz)
    ±0.008 dB
  • Residual Input Noise (20 kHz BW)
    1.3 µV
  • Residual THD+N (20 kHz BW)
    –103 dB + 1.4 µV
  • Individual Harmonic Analyzer
  • Max FFT Length
    1248K points
  • DC Voltage Measurement

  • PC with 2 GHz or faster multi-core processor (2 or more cores)
    Note: the Intel Atom dual-core processor does not have sufficient performance to run APx software.
  • 2 GB or more RAM (4 GB or more recommended for Windows 7).
  • Microsoft Windows XP (32-bit, SP 2 or later), Windows Vista (32-bit), Windows 7 (32- or 64-bit), Windows 8 (32- or 64-bit).
  • More detailed information is available on our
    AP Software and Windows Compatibility chart
  • Download System Requirements Document
  • System performance is sensitive to processor speed; faster processors will yield faster results.
  • APx500 is data intensive and it is recommended that other data-intensive applications not be run concurrently. This includes Audio Precision AP2700, APWIN or ATS.
  • Microsoft Windows XP (32-bit, SP 2 or later), Windows Vista (32-bit), Windows 7 (32- or 64-bit), Windows 8 (32- or 64-bit).

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