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 Audio Precision APx555B is the standard for audio analyzers. With a typical residual THD+N of −120 dB and over 1 MHz bandwidth, the APx555B surpasses the analog performance of all other audio analyzers, including a 5 dB improvement compared to the legacy 2700 Series analyzer.

APx555B has two balanced and two unbalanced analog inputs and outputs plus digital inputs and outputs via AES/EBU, TOSLINK and S/PDIF. I/O may be expanded with optional Programmable Serial, HDMI2 + eARC, PDM and Bluetooth modules. The Advanced Master Clock (AMC) module comes standard, synchronizing the analyzer with external equipment and enabling jitter generation and analysis.