The New Standard – performance and versatility in audio analysis

Product Description

APx555 High-Performance, Modular Two-Channel Audio Analyzer

APx555 is a two-channel audio analyzer without compromise. Developed for R&D engineers and production technicians who need the highest possible performance, a broad range of digital I/O options and fast, intuitive software, the APx555 is the new standard for audio analyzers.

Unprecedented Performance
With a typical residual THD+N of -120 dB and over 1 MHz bandwidth, the APx555 surpasses the analog performance of all other audio analyzers, including a 5 dB improvement compared to our 2700 Series analyzer. Add to this FFTs of 1.2 million points and full 24-bit resolution, and you have performance unmatched by any other instrument.
Maximum Versatility in I/O
APx555 has two balanced and two unbalanced analog inputs and outputs plus 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. A new Advanced Master Clock (AMC) module handles input and output clock signals to synchronize the APx555 with external equipment (or vice versa), and the AMC also enables jitter generation and analysis. AMC is standard with the APx555 and is an option for the APx52x Series and APx58x Series Audio Analyzers.


Sine Frequency Range
0.001 Hz to 80 kHz, DAC
5 Hz to 204 kHz, Analog
Frequency Accuracy
3 ppm, DAC
0.35%, Analog (10 Hz to 100 kHz)
IMD Test Signals
Maximum Amplitude (balanced)
26.66 Vrms
Amplitude Accuracy
±0.03 dB
Flatness (5 Hz–20 kHz)
±0.008 dB
Residual THD+N (22 kHz BW)
–117 dB + 1.0 µV
Typically <–120 dB (1 kHz, 2.0 V)
Analog Output Configurations
unbalanced, balanced, CMTST



User Guide