Trade-In Your 2700 Series Audio Analyzer.
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2700 Series High-Performance, Two-Channel Audio Analyzer


Save up to 25% of a new AP Analyzer when you trade-in your 2700. This is AP's most generous trade-in opportunity and is only available for a limited time. Valid through December 31st, 2024.

The 2700 Series is designed for audio engineers who need high performance, low distortion and flexibility in their audio analyzer. With the Programmable Serial Interface Adapter (PSIA), it is a powerful solution for high-end converter and other chip designers.

The 2722’s true dual domain architecture enables extraordinary performance in measuring both analog and digital signals. The analog generator and analyzer performance surpasses that of any purely digital converter-based designs, while digital analysis techniques offer a wide array of precise, high-speed measurement techniques for either domain. Cross-domain work can be accomplished using the best of both worlds.

The typical THD+N of the 2700 Series is ≤ -115 dB at 2.0 Vrms. However, even with AP’s conservatively specified THD+N of -112 dB, the 2700 Series is second only to the APx555 in analog performance.

  • Dedicated analog circuitry for low residual noise and THD+N
  • 192 kHz digital input and output capabilities
  • Generates and analyzes a broad palette of stimulus signals such as MLS, white and pink noise and other special purpose waveforms
  • Extensive API automation with AP Basic scripting and “learn mode,” LabVIEW driver and an IEEE.488 GPIB interface
  • User-defined sweeps, switcher support up to 192 channels

Model Options
2700 Series “A” (APIB) instruments have an APIB (Audio Precision Interface Bus) connector and require Windows XP, or later versions, to run the AP Control Software. “G” instruments include the IEEE-488.2 GPIB interface and can also be controlled directly through GPIB.

  • SYS-2722: Dual domain. Two-channel analog input/output, analog analyzer and generator, DSP analyzer and generator, plus 192k digital input/output.
  • SYS-2712: Analog domain only. Two-channel analog input/output, analog analyzer and generator, DSP analyzer and generator.
  • SYS-2702: Analog domain only. Two-channel analog input/output, analog analyzer and generator.


Analog Performance

Combining dual-domain functionality with very low distortion and noise performance, the 2700 Series is the classic standard for audio analysis, perfect for audio engineers who need high performance, low distortion and high reliability.

Flexible Control

AP2700.exe is the control software for 2700 Series instruments. Running on the controlling PC, AP2700 is a powerful and sophisticated real-time interface, with hardware and software system modules and functions controlled using settings on virtual panels, and measurement results displayed in virtual meter and graph readings.

Measurement Speed

The 2700 Series offers an array of powerful, time-saving analysis tools to speed your testing procedures including, but not limited to: multitoned testing, harmonic distortion analysis, filter creation and more.

Digital Analysis

The 2700 Series offers both AES3 and IEC60958 serial digital interfaces, with fully configurable serial data and clock ports available via the auxiliary PSIA-2722 Programmable Serial Interface Adapter.


2700 Series audio analyzers are in Depleted Supply Status. These instruments are no longer available.

Please contact your local AP representative to discuss replacement products appropriate for your application. The closest replacement products in the Audio Precision portfolio are the B Series APx555 or the B Series APx525 analyzers.

This product is not updated to comply with RoHS Directive 2011/65/EU and, as of July 22, 2019, will not be shipped to the European Union (EU). Customers may be able to purchase products from inventory that were placed on the EU market prior to July 22, 2019 until supplies are depleted. Audio Precision is committed to assisting with your audio measurement needs. Please contact your local AP sales representative for further assistance or to determine if alternative product(s) are available.



The 2700 Series has five filter slots to accommodate analog filters in nearly any configuration. Standard configurations already include the S-AES17 or OPT-2020 filter. See below for other filters or visit the Option Filter page for more information.

2700 Series standard configurations also include tone burst, square wave and noise generation (formerly option S2-BUR).

Analog options

  • S-AES17: Special lowpass filter satisfies AES17 for measurements in the presence   of out-of-band noise.  Includes 20 kHz and 40 kHz brick wall filters (FLP-B20K and FLP-B40K). This filter requires two filter slots.
  • OPT-2020: Pre-analyzer lowpass filter
  • S2-IMD: Adds IMD generator and analyzer to SYS-2702, SYS-2712, or SYS-2722
  • S2-W&F: Adds wow and flutter analyzer to SYS-2702, SYS-2712, or SYS-2722
  • S2-BUR: Adds tone burst, square wave and noise generator to SYS-2702, SYS-2712, or SYS-2722 (now included standard with all 2700 Series)
  • S2-EURZ: Changes analog generator source impedance to be 40, 200, or 600 ohms in SYS-2702, SYS-2712, or SYS-2722
  • OPT-2711: Adds the Dolby Digital Generator option to a new SYS-2722, allowing the encoding of stimulus tones in Dolby Digital (AC-3) before digital output. Includes IEC61937 and licensed Dolby Digital encoding software, and proprietary Audio Precision streaming interface (APSI) hardware installed in the instrument. (Not compatible with GPIB systems, not compatible with 64-bit versions of Windows. See AP Software Windows Version Compatibility for details.)

Optional Analog Filters

Up to 5 optional hardware filters may be installed in the analog analyzer in SYS-2702, SYS-2712, or SYS-2722.

  • FIL-AWT: A-weighting filter
  • FIL-CCR: CCIR 468-4 weighting filter
  • FIL-CWT: C-weighting filter
  • FIL-CIT: CCITT P.53 weighting filter
  • FIL-CMS: C-message weighting filter
  • FIL-D50: 50 µs de-emphasis filter
  • FIL-D50E: 50 µs de-emphasis filter plus 15.625 kHz notch filter
  • FIL-D50F: 50 µs de-emphasis filter plus 19 kHz notch filter
  • FIL-D75: Precision 75 µs de-emphasis filter
  • FIL-D75-AWT: 75 µs de-emphasis filter plus A-weighting filter
  • FIL-D75B: 75 µs de-emphasis filter plus 15.734 kHz notch filter
  • FIL-D75F: 75 µs de-emphasis filter plus 19.0 kHz notch filter
  • FIL-IECR: 200 Hz to 15 kHz bandpass filter plus 15.625 kHz notch filter
  • FIL-RCR: 200 Hz to 15 kHz bandpass filter plus 19 kHz notch filter
  • FIL-FMP: 15 kHz low-pass filter plus 19 kHz notch filter
  • FIL-VID: 15 kHz low-pass filter plus 15.625/15.734 kHz notch filter
  • FLP-B20k: 20 kHz “brick wall” filter (replaces FLP-A20k) (This filter is included with S-AES17)
  • FLP-B40k: 40 kHz “brick wall” filter (This filter is included with S-AES17)



Sine Frequency Range
10 Hz to 204 kHz

Frequency Accuracy
±3 ppm

IMD Test Signals

Maximum Amplitude (balanced)
26.43 Vrms

Amplitude Accuracy
±0.06 dB

Flatness (20 Hz–20 kHz)
±0.008 Db (typically <0.003 dB)

Residual THD+N (22 kHz BW)
–112 dB + 1.0 µV @ 1 kHz

Analog Output Configurations
unbalanced, balanced

Digital Output Sampling Rate
28 kHz to 200 kHz

Encoded Audio Formats
Dolby Digital


  • IBM-compatible PC with the minimum processor type and memory required by Microsoft for the installed operating system.
  • Supports Microsoft Windows XP Professional SP2 and SP3 (32-bit), Windows Vista Business and Ultimate Editions (32-bit), Windows 7 Professional and Ultimate Editions SP1 (32- and 64-bit), Windows 8 Pro and Enterprise Editions (32- and 64-bit).
  • The AP2700 64-bit driver only supports AP’s APIB-USB adapter, and is not compatible with APIB add-in cards (ISA, PCI, PCIe, and PCMCIA buses).
  • The AP2700 64-bit driver does not support the OPT-2711 Dolby Digital generator option. Instruments with OPT-2711 installed will function correctly on a 64-bit PC, but the Dolby Digital generator will not be available.


Maximum Rated Input Voltage
160 Vrms

Maximum Bandwidth
>500 kHz

IMD Measurement Capability

Amplitude Accuracy (1 kHz)
±0.05 dB

Amplitude Flatness (20 Hz–20 kHz)
±0.02 dB

Residual Input Noise (22 kHz BW)
<1.0 µV (-117.8 DbU)

Residual THD+N (22 kHz BW)
–112 dB + 1.0 µV @ 1 kHz

Individual Harmonic Analyzer

Max FFT Length
32K points

DC Voltage Measurement