NTI ML1 Minilyzer Handheld Analog Audio Analyzer / Meter


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  • The Minilyzer ML1 is a powerful, complete audio analyzer in a palm-sized format. Its comprehensive set of easy to access measurement functions simplify the process of system verification, diagnostics and repairs of even very complex audio installations. The smart user interface aids operators of all skill levels by setting all ranges automatically and providing complete results on a single screen.


    Continuously measures absolute input levels either in volts, dBu or dBV and the signal frequency. Relative measurements are also supported. Connecting MiniSPL further supports basic SPL and LEQ measurements (SPL/LEQ).


    Supports Total Harmonic Distortion plus Noise (THD+N) and 2nd to 5th selective harmonic distortion as dB value or in %. Input level and frequency measurement runs in parallel and balance indicator finds defective cables.

    Frequency Sweep

    ML1 automatically triggers to a sweep sequence with any step width and records the frequency response. The Minirator MR2 or MR-PRO may be used as signal source. After capture all sweep data is available.


    Finding wrongly connected speakers is as simple as moving ML1 into the sound field of the speaker under test and its polarity will be displayed. The same measurement through the XLR input is ideal for cable tests.

    Time Sweep

    Intermittent faults are often hard to find. The time sweep records the RMS level, frequency and the THD+N value simultaneously, helping to monitor the audio signal during a long period of time for later analysis.


    Provides a quick and robust look at the waveform of the balanced audio signal, quickly finding clipping amplifiers etc. The auto-scale and auto-trigger functionality are normally only found in expensive stand alone scopes.

    1/3rd Octave

    Analyze and improve sound systems using the 1/3rd Octave analyzer. With Pink Noise as a stimulus the frequency response of every sound system is directly visible on the Minilyzer screen. The peak frequency display supports you in feedback improvements.


    Do you have to supply your mix to a broadcast van? By using the vu&ppm meter with free adjustable reference levels you can provide a perfect leveled signal. The vu meter enables you to adjust your outboard equipment for a perfect compression of your sound material.

    Induction Loop Measurements AFILS

    The Minilyzer together with the optional MiniLINK USB interface measures induction loops AFILS according standard IEC60118. A complete measurement menu following the standard can be enabled including calibration to customer field sensors.

  • MeasurementsLevel-RMS, Level-SPL, Level-LEQ, Level-Relative, THD+N, vu+PPM, Polarity Test, Signal Balance Error, Frequency Sweep, Time Sweep, 1/3rd Octave Spectrum, ScopeFrequency, AFILS measurements (with MiniLINK)
    Units dBu, dBV, VRMS Accuracy ± 0.5 % @ 1 kHz
    Flatness ± 0.1 dB Bandwidth 20 Hz to 20 kHz
    Resolution 3 digits (dB-scale) or 4 digits (V-scale)
    Range: 10 Hz to 20 kHz
    Resolution: 4 digits
    Accuracy:< ± 0.1 %
    including 2nd to 5th harmonics analysis
    Meas. Bandwidth: 10 Hz to 20 kHz
    Resolution: 4 digits
    Residual THD+N: balanced < -85 dB @ -10 dBu to +20 dBu
     unbalanced < -74 dB @ 0 dBu to +14 dBu
    vu + PPMvu-Indicator and Peak Program Meter
    According to IEC 60268 and DIN 45406, PPM Type I, IIa and Nordic.
    Both meters with adjustable reference and with analog & numerical peak-hold readout.
    Polarity TestPositive / Negative detection through internal microphone or XLR/RCA connector. Checks polarity of tweeters, midrange-speakers, woofers, sub-woofers and cables. Down to 10 dB S/N ratio of input signal. MR2 or MR-PRO provides the test signal.
    Balance ErrorIndication range 0.0 % to 100 %
    Deviation from perfect balance in % or *1
    SweepFrequency Sweep: Level as function of frequency.
    Time Sweep: Measurement of level, THD+N and frequency as function of time.
    1/3rdOctaveSpectrum acc. IEC 1260, class II and ANSI S1.11-1976, class II from 50 Hz to 20 kHz, Bargraph for LevelRMS 20 Hz to 20 kHz
    ScopeAuto triggering, auto ranging, auto scaling
    Filters Linear, A-weighting, C-weigting, C-message, Highpass 22 Hz / 60 Hz / 400 Hz, X-Curve-1, Voice bandpass
    Input ConnectorsXLR balanced, RCA unbalanced
    Impedance40 kOhm balanced, 20 kOhm unbalanced
    Max. AC Inputbalanced +20 dBu (7.75 VRMS), unbalanced +14 dBu (3.8 VRMS)
    for input levels > 20 dBu (balanced) the Adapter -20 dB is available as accessory
    Max. DC Input± 50 VDC
    Residual Noise< 12 µV, XLR-input shorted
    Internal MicOmni directional (for polarity and delay measurement only)
    Monitor OutputJack 3.5 mm (1/8“), suitable for all common headsets
    Display Graphic LCD 64 x 100 pixel, with backlight
    Batteries3x AA batteries (alkaline)
    Typical battery lifetime > 16
    Dimensions163 x 86 x 42 mm (6.4“ x 3.38“ x 1.63“)
    Weight300 g (10.5 oz) incl. batteries
    Temperature0° to +45° C (32° to 113° F)
    Humidity90 % R.H., non condensing
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