Audio Precision APX555B Audio Analyzer
Audio Precision APX555B delivers premium 2-channel audio analysis with -120 dB THD+N, 1 MHz bandwidth, 1.2M point FFTs, and extensive digital I/O.
Product details
| Model | APX555B |
| Manufacturer | Audio Precision |
| Category | RF & Microwave Test Equipment |
| Availability | Made to order |
Description
Overview
The Audio Precision APX555B is a premium 2-channel audio analyzer designed for R&D engineers and production technicians demanding the highest possible performance. With industry-leading analog performance—residual THD+N of -120 dB typical and 1 MHz bandwidth—the APX555B surpasses comparable instruments. It features balanced and unbalanced analog inputs and outputs, comprehensive digital I/O via AES/EBU, TOSLINK, SPDIF, and optional modules for Digital Serial, HDMI with ARC, PDM, and Bluetooth connectivity. The Advanced Master Clock (AMC) module, standard with the APX555B, handles input and output clock synchronization and enables jitter generation and analysis.
Key Features
- Residual THD+N: -120 dB typical (22 kHz BW)
- Bandwidth: up to 1 MHz @ 24-bit resolution
- Maximum FFT length: 1.248 million points
- Frequency range: 0.001 Hz to 80 kHz (DAC: 5 Hz to 204 kHz)
- Two balanced and two unbalanced analog inputs and outputs
- 192 kHz digital I/O via AES/EBU, TOSLINK, SPDIF
- Signal generation up to 204 kHz at 26 Vrms
- Advanced Master Clock (AMC) standard for clock synchronization and jitter analysis
- Supports IMD measurements: SMPTE, MOD, DFD, DIM
- Individual harmonic analysis up to H10
- Dolby and DTS generator (file-based)
- Sequence Mode for fast production testing or Bench Mode for real-time parameter visibility
Applications
- Audio device R&D with highest performance requirements
- Production testing with CEA-2006 and CEA-490A compliance
- Jitter generation and analysis for digital audio systems
- CMRR measurements per IEC60268 section 14.15.1
- Multi-channel audio testing and analysis
Specifications
| Analog Input Channels | 2 balanced, 2 unbalanced |
| Analog Output Channels | 2 balanced, 2 unbalanced |
| Residual THD+N | -120 dB (typical, 22 kHz BW) |
| Maximum Bandwidth | 1 MHz @ 24-bit |
| Sine Frequency Range | 0.001 Hz to 80 kHz (DAC: 5 Hz to 204 kHz) |
| Frequency Accuracy | 3 ppm |
| Maximum Amplitude | 26.66 Vrms balanced, 13.33 Vrms unbalanced |
| Maximum Rated Input Voltage | 300 Vrms balanced, 160 Vrms unbalanced |
| Amplitude Accuracy (1 kHz) | ±0.03 dB |
| Amplitude Flatness (10 Hz - 20 kHz) | ±0.008 dB |
| Residual Input Noise (22 kHz BW) | ≤1.0 µVrms |
| Maximum FFT Length | 1.248 million points |
| Digital Output Sampling Rate | 22 kS/s to 216 kS/s |
| Digital I/O | AES/EBU, TOSLINK, SPDIF (192 kHz) |
| Advanced Master Clock | Yes (standard) |
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Audio Precision APX555B Audio Analyzer