NTI MiniSPL Analyzer Measurement Microphone for Acoustilyzer AL1 and Minilyzer ML1


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Dale #:NTI-600000022

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  • The MiniSPL is the ideal accessory for the Acoustilyzer AL1 and Minilyzer ML1. Its self-powered design, the individual factory adjustment and the auto power-off control combine to make MiniSPL an accurate, easy to handle yet affordable measurement microphone.

    The servo-loop output stage design supports long cable connections between the analyzer and the microphone - up to several hundred meters. MiniSPL is also recommended and easy to use in conjunction with PC based measurement systems with high quality audio cards.The MiniSPL measurement microphone includes following additional items: 1x Windscreen; 1x Microphone-holder + Adapter 5/8“ - 3/8“


    • 1/2“ Measurement Mic
    • Battery Powered
    • Balanced Output
    • Omni-directional
    • Individually Adjusted
    • Auto Power-Off Control
  • MR Pro
    OutputsBalanced XLR, unbalanced RCA
    phantom power resistant
    InputsDC power supply, USB
    XLR for cable test
    Wave FormsSine, Pink Noise, White Noise
    Polarity test signal, Delay test signal
    Wave File Format
    Sampling freq48 kHz
    Resolution16 Bit, Mono & Stereo
    Output level0 dBFS = 18 dBu (sine)according to EBU R68
    Frequency setting
    Range 10 Hz - 20 kHz
    Incrementin 1 digit steps
    Accuracy 0.01%
    Stepped Sweep Function
    Freq. rangefreely selectable
    Increment1/1, 1/3, 1/6, 1/12 octave
    Sweep speedselectable 0.5 - 5 seconds
    Continuous Sweep (Chirp) Function
    Freq. rangefreely selectable
    IncrementLinear / Logarithmic
    Chirp speed 1.0 - 99 seconds per cycle
    Level UnitsdBu, dBV, V
    dBFS, %
    Output Level Ranges
    Sine, Sweep, Chirp- 80 dBu to +18 dBu
    White Noise- 80 dBu to +10 dBu
    Pink Noise- 80 dBu to + 8 dBu
    Polarity, Delay Test- 80 dBu to +16 dBu
    Flatness ± 0.2 dB
    Accuracy @ 1kHz± 0.2 dB
    22 Hz - 22 kHz, average, @ 1 kHz, typical-96 dB (0.0016 %) @ 18 dBu
    Noise Floor typ. 15 μV
    Output Impedance12.5 Ohm balanced
    Imax = 10 mA
    Impedance Measurement
    Method Absolute value Z
    Meas. range4 Ohm - 50 kOhm balanced
    2 Ohm - 25 kOhm unbalanced
    @ f = 30 Hz to 10 kHz (Sine)
    @ Level from -20 to +18 dBu
    Accuracy ± 10 % or ± 2 Ohm
    Phantom Power Reading
    Meas. range0 - 54 V
    Accuracy± 3 % or ± 0.5 V
    USB FunctionalityFirmware update
    Mass Storage Device
    Flash Memory32 MByte
    for storing wave files and configurations
    Display Graphical, with back light
    Auto-Power-Off10, 30, 60 minutes or OFF
    Batteries3 x AA Alkaline dry cells or rechargeable equivalents
    Battery Life typical - 10 h
    Temperature range0° to 45° C (32° to 113° F)
    Humidity < 90% rel. humidity, non-condensing
    Dimensions (LxWxH)152 x 81 x 43 mm
    (incl. protective shock jacket)
    Weight310 g (11 oz.) (including batteries)
    Sound Pressure Level•Leq, short-time Leq , Lmin, Lmax acc. IEC 61672, DIN15905-5, SLV 2007•Timer for single and repeated measurements

    •Dynamic range (using MiniSPL): 30 - 130 dBSPLA•Filters: Flat, A- and C-weighted, X-Curve-1, RLB

    •Logging of SPL/LEQ results into AL1 memory•Wideband- and RTA values simultaneously available
    Real Time Analyzer•1/3 or full octave band resolution, class 0 filters•SPL, LEQ and Max-Min display per band

    •Fast logging of results to the PC
    Zoom FFT•Real-time Zoom FFT with 50% overlapping, 93 Bins•Frequency Range: 10 Hz - 20 kHz

    •Resolution: 187.5 Hz to 0.73 Hz
    Reverberatinon Time•1/1 Octave band resolution, based on T20 results, according to ISO3382•1/3 Octave band resolution with post processing

    •Automatic averaging with individual result readout and storage•Source signal: Gated pink noise (from Test-CD or Minirator)
    Polarity Test•Positive / 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.•Testsignal: NTi Audio Polarity Signal (AL1 Test CD oder Minirator)
    Delay Time•Propagation delay between electrical and acoustical signal input using built-in mic. Resolution < 0.1 ms, max time: 1 s•Dedicated test signal: NTi Audio chirp (from Test-CD or Minirator)
    STIPA (Option)•Single value STI and CIS test result. Modulation indices and individual band level results accessible. Error indicator.•According to IEC 60268-16, 2003 release

    •TNO verified algorithm•Post processing with recorded spectra supported
    Electrical•Level: RMS, THD+N, Frequency, Polarity• Filters: Flat, A- and C-weighted, HP400, HP19k
    LevelUnits: dBu, dBV, VRMSAccuracy: ± 0.5 % @ 1 kHz

    Flatness: ± 0.1 dBBandwidth: 20 Hz to 20 kHz

    Resolution: 3 digits (dB-scale) or 4 digits (V-scale)
    FrequencyRange: 10 Hz to 20 kHzResolution: 4 digits

    Accuracy: < ± 0.1 %
    THD+NMeas. Bandwidth: 10 Hz to 20 kHz

    Resolution: 4 digitsResidual THD+N: balanced < -85 dB @ -10 dBu to +20 dBu

    Residual THD+N: unbalanced < -74 dB @ 0 dBu to +14 dBu

    Data logging

    •Interneral device memory for up to 580 records•USB interface to MiniLINK PC software

    •Online data logging from Acoustilyzer directly to PC
    Input ConnectorsXLR balanced, RCA unbalanced
    Impedance40 kOhm balanced, 20 kOhm unbalanced
    Max. AC Input

    •balanced +20 dBu (7.75 VRMS),

    •unbalanced +14 dBu (3.8 VRMS)• for input levels > 20 dBu (balanced) the accessory Adapter -20 dB is available

    Max. DC Input± 50 VDC
    Residual Noise< 12 µV, XLR-input shorted
    Internal MicrophoneOmni directional (for polarity and delay measurement only)
    Monitor OutputJack 3.5 mm (1/8“), suitable for all common headsets
    DisplayGraphic LCD 64 x 100 pixel, with backlight
    Batteries3x AA batteries (alkaline)
    Typical battery lifetime > 16 hours
    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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