NTi Audio · XL2 · Handheld sound level meter
XL2 Audio & Acoustic Analyzer
CurrentHandheld sound level meter and audio analyser with interchangeable microphones, 1/1 and 1/3-octave real-time analysis, FFT, reverberation time and optional STIPA, building acoustics and 100 ms logging. The XL2-TA with the M2230 microphone is a type-approved Class 1 integrating sound level meter; with the M4261 microphone it is Class 2. Data is stored as text files on a removable SD card.
Specifications verified on .
- Type
- Handheld sound level meter
- Class
- Class 1
- Channels
- 1
- Octave bands
- 1/1 and 1/3
- Connectivity
- USB mini-B, digital I/O, XLR and RCA inputs, 3.5 mm headphone output, TOSLink (prepared)
- Weight
- 480 g
- Battery life
- 4 h
Manufacturer list price
USD 1,920 (XL2 base unit without microphone, NTi Audio Inc. US web shop; XL2-TA USD 2,655; microphones priced separately.) — published by the manufacturer at us.shop.nti-audio.com, seen on . Prices from distributors are not recorded.
Specifications
As published by NTi Audio. Fields the manufacturer does not publish are omitted rather than estimated.
| Specification | Value |
|---|---|
| IEC 61672-1 class | Class 1 |
| Standards | IEC 61672:2013 class 1 (XL2-TA with M2230) or class 2 (with M4261), ANSI S1.4:2014, ANSI S1.43, IEC 61260:2014 class 1, ANSI S1.11:2014 class 1, IEC 60651, IEC 60804, IEC 60268-16:2020 (STIPA option), ISO 3382 and ASTM E2235 (reverberation time), DIN 15905-5, DIN 45645-1, DIN 45657:2014, JIS C1509-1:2005, BS 4142:2014 |
| Pattern approvals | Germany, Switzerland, France, Hungary, Poland |
| Recommended calibration interval | 12 months |
| Specification | Value |
|---|---|
| Channels | 1 |
| Measurement range | 17 to 137 dB(A) with M2230; 21 to 144 dB(A) with M2211; 25 to 153 dB(A) with M2215; 27 to 146 dB(A) with M4261 |
| Linearity range | 24 dB(A) to 137 dB with M2230; 25 dB(A) to 138 dB with M2340; 29 dB(A) to 144 dB with M2211; 33 dB(A) to 153 dB with M2215; 33 dB(A) to 146 dB with M4261 |
| Frequency range | 4.4 Hz to 23 kHz (-3 dB) |
| Frequency weightings | A, C, Z |
| Time weightings | F, S, I |
| Simultaneous weightings | Yes |
| Parameters | SPL, Leq, Lmin, Lmax, Lpeak, gliding LAeq/LCeq, LAE (option), LN percentiles 1 to 99 % (option), LCeq-LAeq, LAIeq-LAeq, TaktMax, LEX, RT60 |
| Specification | Value |
|---|---|
| Octave bands | 1/1 and 1/3 |
| Octave band filter class | class 1 (IEC 61260:2014, ANSI S1.11-2014); 1/1 octave 8 Hz to 16 kHz, 1/3 octave 6.3 Hz to 20 kHz |
| FFT | 143 bins per display range; zoom FFT to 0.4 Hz resolution, 5 Hz to 20 kHz (option) |
| Reverberation time | Yes |
| Building acoustics | Yes |
| Speech intelligibility | STIPA |
| Audio recording | Yes |
| Specification | Value |
|---|---|
| Shortest logging interval | 100 ms (option); 1 s standard |
| Memory | removable SD card, 8 GB supplied |
| Specification | Value |
|---|---|
| Microphone | M2230 1/2" class 1 certified (type approved); M2211 class 1 frequency response; M4261 class 2; M2215 high SPL; XLR 48 V phantom |
| Detachable preamplifier | Yes |
| Outdoor microphone kit | WP30 / WP40 weather protection; Basic and Heavy Duty Outdoor Cases |
| Weather sensors | Yes |
| Display | 160 x 160 pixel greyscale with LED backlight |
| Battery | rechargeable Li-Po 3.7 V 2260 mAh, or 4 x AA |
| Battery life | 4 h |
| External power | 7.5 to 20 V DC (9 V DC adapter); USB for short-term operation |
| Weight | 480 g |
| Dimensions (mm) | 180 x 90 x 45 |
| IP rating | IP51 |
| Operating temperature (°C) | -10 to 50 |
| Specification | Value |
|---|---|
| Connectivity | USB mini-B, digital I/O, XLR and RCA inputs, 3.5 mm headphone output, TOSLink (prepared) |
| Remote control | Remote Measurement option; NetBox for NoiseScout and MeasurEye cloud platforms |
| Software | Data Explorer, Sound Insulation Reporter, Room Acoustics Reporter, XL2 Projector PRO, NoiseScout, MeasurEye |
| Latest firmware | V4.93, May 2026 |
Variants
| Variant | Difference |
|---|---|
| XL2 | Standard configuration; class depends on microphone (M2230 or M2211 class 1 frequency response, M4261 class 2). |
| XL2-TA | Type Approval option preinstalled; with M2230 microphone and MXA01 shroud it is a type-approved class 1 integrating sound level meter (IEC 61672, ANSI S1.4). |
Where this data comes from
| Kind | Document | Accessed |
|---|---|---|
| Product page | XL2 Audio & Acoustic Analyzer | |
| Datasheet | XL2 Specifications | |
| Datasheet | XL2 Vibration Meter Specifications (shared XL2 hardware data) | |
| Manual | XL2 Operating Manual V4.93 | |
| Price list | Buy XL2 Audio & Acoustic Analyzer (NTi Audio US shop) | |
| Datasheet | XL2 Spezifikationen (German-language specification sheet, NTi Audio) |
Verified on . Only the manufacturer’s own published material is used; distributor pages are not sources.
Spec out of date? Tell us (reference nti-xl2).
Verified owner reviews
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Known issues and firmware notes
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Feature requests
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Read next
- How to choose a sound level meter · Class 1 vs class 2, integrating vs non-integrating, parameters by application, options and licences, calibration.
- Class 1 vs class 2 sound level meters · IEC 61672-1 tolerances, what the classes do and do not say, and where each is typically required.
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