NTi Audio
Basic Speaker Testing

Test Solutions for PA Rental

The XL2 with Spectral Limits Option offers an efficient, low-cost solution for the quality control of speakers at PA Hire. Measurements can be compared against a reference curve with customized tolerance bands.

The pass/fail results are provided by the internal tri-color LED or an optional external Stack Light. Integration tools for automation and remote operation are provided.


  • Inspection of returned speakers and microphones for reliable operation
  • Acoustic passed/failed measurements in quality control and service


  • Handheld and compact design
  • Turnkey solution for passed/failed measurements in one unit
  • Measurement starts by level trigger, external foot switch or instrument start button
  • Improved efficiency with dedicated measurement profiles
  • Automated documentation

Measurement Functions

XL2 with M4260 Measurement Microphone

FFT Analysis

Compares the high-resolution acoustic pattern of any device against a pre-defined reference sample with a pass/fail analysis in linear X-scaling.

1/12 Octave Analysis

Passed/Failed measurements with selectable 1/1, 1/3, 1/6 or 1/12 octave band resolution in logarithmic X-scaling.

Pass/Fail Measurements

The XL2 Analyzer captures the frequency spectrum of reference speakers/microphones and supports generation of tolerance bands based on the captured reference data. Measurements can either be displayed as absolute traces or shown relative to previously stored traces. Frequencies with failed results are individually visualized in every frequency band.

                  XL2 12th Octave Spectra             NTi Audio Stack Light

Stack Light

Provides visual pass/fail indication.

Auto-start Function

Measurement starts by automatic level trigger, external foot switch or instrument start button.

Tolerance Management

Tolerance curves can either be imported from txt-files or directly derived from captured measurements. The XL2 calculates tolerance bands based on
  • Single captured results
  • txt-files manually generated on the PC
  • Mean average of multiple captures
  • Min/Max curves of multiple captures

Digital I/O Adapter PCB

For automated operation with external peripheral devices the XL2 Analyzer can be linked into a programmable logic controller. The Digital I/O Adapter is tailored for rail mounting in electric switch boxes.

Remote Monitoring

Multiple XL2 Analyzers connect with USB Device Servers to a network for online noise monitoring. Wireless solutions are also supported. An individual Projector Software may be started for each XL2 Analyzer, thus simultaneously displaying all XL2 screens on the PC monitor. Each XL2 Analyzer can be controlled from the host PC.

XL2 Noise Monitoring Network

Individual Solution programmed by Customer

The Remote Measurement Option allows querying of the XL2 measurement data online via the USB interface. Multiple XL2 Analyzers can be implemented into a customer specific noise monitoring solution. The XL2 acts as a front end device for sound level measurements.

Order Information

Exel Live Sound Set

Exel Kit for PA-Rental

  • XL2 Audio and Acoustic Analyzer
  • SpectralLimits Option for XL2
  • M2211 Measurement Microphone
  • Minirator MR-PRO
  • ASD Cable for XL2
  • 2x Mains Power Adapter
  • Exel System Case
  • Remote Measurement Option for XL2
  • Precision Calibrator 94/114 dB
  • Stack Light

Get more Information

Buy at the web shop or contact NTI Americas .

Reference Customers

Bayerische Staatsoper • Big Sky Acoustics Ltd • Business International Group LLC Oman • Cinema City Poland • City of Liverpool College • Cobra Sound Light • Cone Audio Ltda. ME • Elbklaenge Hamburg • Finnish National Opera Foundation • Friendship Sound • GMP Power Sp. z o.o., Sp. K. • Hamasaki Onkyo • Helsinki Pro Audio Ltd. • Intel GmbH • JFK Eventtechnik - Elektronik • Luzerner Theater • Meyer Sound Laboratories Inc. • Middlesex Sound and Lighting • Parkstad Limburg Theaters • Rhino Sound Systems • Staatsschauspiel Dresden • Stage-Conzept Showtechnik • Stockholms Dramatiska Högskola • Stratford Festivals • The Amsterdam Music Theatre • Viva Afrika Sound and Light • WTS Asia Pacific • Wuerth GmbH & Co KG

more ...

Live Sound

Test Solutions

Contact NTi Audio

NTI Americas Inc.
Tigard, Oregon
Thomas E. Mintner
+1 503 684 7050

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Customer Comments

“NTi Audio has some of the best customer support I've experienced in the pro audio field. That's part of why I recommend these tools so often."

Kevin Hooper, Canada