Live Events Monitoring Solution

Live Events: Comply with Sound Limits

The XL2 Analyzer helps you comply with sound limit regulations. Simply power up the sound level meter, select the pre-configured measurement profile and press start. The XL2 measures and logs all levels without further user action, and gives you a red light when you are above the limit. A compressed audio wav-file may be recorded simultaneously.

XL2 with M4260 Measurement Microphone

XL2 Limit Light

Including Correction Factors

The XL2 measures the correction values between the loudest point of the live event and the actual measurement position, e.g. the front-of-house. These correction values are included with the actual measurement data, thus you have the level at the loudest point in the public area under control.

Predict into the Future

Run the Sound Level Predictor PC Software Application to monitor how much time you have BEFORE the light goes red.

Automated Report

Load the logged data into a report template and play the XL2 audio file to review any periods when the sound was over the limit, such as when the audience applause was too loud.

Gives You the Green Light

The tricolor Limit LED or the optional external Limit Light gives you the green light when you are within the prescribed limit. It turns yellow or red when reaching or exceeding the pre-set limits.

Large View of Sound Levels

The Projector PRO software displays the XL2 screen in real-time via USB on the connected Windows or Mac computer. The software toolbar enables control of the XL2 with the mouse and keyboard. The background color turns from green to red  according to the user-defined limits.

The “XL View” and the “Sound Level Predictor” display extend the XL2 Projector PRO for live sound monitoring applications.
  • The “XL View” window presents sound levels in large size on the connected computer screen. Users may select to view one, two or three sound pressure levels. Exceeding levels are presented with a pre-warning amber or alarming red color.
  • The “Sound Level Predictor” visualizes the level history of the current measurement interval and indicates the headroom for the actual measurement period or the next few minutes. Green bars confirm that the present level is well below limits. Red bars are a call to action to reduce the sound level at the mixing desk. This allows the FOH engineer to optimize dynamic passages of the band for maximum audience satisfaction while still remaining within the legal limits.

Additionally the Projector PRO software offers the ability to retrieve measurement data from the XL2 without interruption to the measurement process. The entire file system of the XL2 is available while the XL2 is measuring.

The “XL View” and the “Sound Level Predictor” require that the Remote Measurement Option be installed on the XL2. The XL2 Projector PRO software is a free download for all registered XL2 customers at the XL2 Support website.

System Requirements:
  • Windows 7, 8, 10 or higher
  • Mac OS 10.8 or higher

Local Noise Monitoring Network

Multiple XL2 Analyzers connect with USB Device Servers via LAN or WLAN within a local network for online noise monitoring. 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.

Type Approval Option

The Type Approval Option, when installed on your XL2, upgrades the instrument to the XL2-TA, the sound level meter for certified measurements. The XL2-TA, together with the M2230 microphone and Shroud jacket, forms a type-approved sound level meter offering class 1 performance in accordance with IEC 61672:2014, IEC 61260:2014, ANSI S1.4:2014 and ANSI S1.11:2014 standard.

Type approved sound level meter configuration:
  • XL2-TA Sound Level Meter (XL2 with Type Approval Option installed)
    • Firmware V3.11
    • Optional: Extended Acoustic Pack Option
    • Optional: XL2 Input Keypad
  • M2230 Measurement Microphone
  • Shroud MXA01

XL2-TA Type Approval Certificate

Order Information

Exel Set for Live Sound Monitoring

Exel Kit for Live Sound Monitoring

  • XL2 Sound Level Meter
  • M4260 Measurement Microphone
  • ASD Cable
  • Mains Power Adapter
  • Exel System Case

Optional as required:

Limit Light

visual level indication with a green, orange or red light

Precision Calibrator

for user calibration

Remote Measurement Option for XL2

for querying measurement data

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 Audio Contact Americas  
Brian MacMillan
+1 503 684 7050

Related Products

Links to Functions

Customer Comments

"I have now been using the XL2 a couple of weeks. I'm really enjoying the marvellous instrument! I have for example recorded audio and all sorts of dB readings in a live performance of my friend's jazz band. I got readings from 35.9dB (LAFmin) up to 127.6dB (LCPKmax). The dynamics of the XL2+M2210 really is huge! In addition the noise floor is very smooth - no cracks,chirps or whining - just quiet hiss. Very impressive indeed."
Marko Malinen, Finland

“I am happy that you keep on developing new applications and uses for the XL2, it is quite a convenient and powerful tool. In my opinion it is a serious competition for the traditional sound level meters at a better price and with more versatility. The Type Approval is an important step forward in the acceptation of the system; even in situations where type approval is not really needed, it helps avoiding discussions on the validity of the measurements."
Ben Kok,, Netherlands