The APx52xB Series 2-channel audio analyzers are designed for R&D engineers and production technicians who require fast, straightforward audio testing, yet do not need the ultra-high performance of the APx555B or the multi-channel capacity of the APx585B.

The APx525B features two balanced and two unbalanced analog input/output channels, plus 216 kHz-capable digital I/O via AES/EBU, TOSLINK and SPDIF interfaces. The APx526B is a 4-channel variant of the APx525B, engineered for 4-channel head units widely used in the automotive audio industry.

Furthermore, the I/O capacity can be expanded with optional modules including Digital Serial (available for both APx525B and APx526B), HDMI + ARC (APx525B only), PDM (APx525B and APx526B), and Bluetooth (APx525B and APx526B). Additionally, the optional Advanced Master Clock (AMC) module manages input and output clock signals to synchronize the APx52xB Series with external devices (or synchronize external hardware to the analyzer). The AMC also enables jitter generation and jitter analysis when paired with Advanced Digital, Digital Serial or PDM modules.