ETANI ELECTRONICS CO., LTD.

S-255 LOUDSPEAKER TEST SYSTEM

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A production line system capable of measuring rub & buzz noise.
Widely applicable from compact to large Hi-Fi speakers.

ETANI’s 4th generation system is designed to be cost-effective by employing advanced digital signal processing merged with hardware and software, as well as PC ability. Highly accurate and stable analyses are performed approximately in real-time

S-255 FEATURES

  • Easy to operate.
  • Enables you to perform a wide range of measurements repeatedly at high speed with high accuracy, and distinguish good and defective samples on time.
  • Visualizes test data, which can be used as analysis data for quality control by statistical processing.

S-255 MEASUREMENT CAPABILITY

The S-255 Loudspeaker Test System is an instrument for the production lines that can also measure rub & buzz noise. The system automatically tests all characteristics that are required of speakers. It can handle a variety of purposes, from compact speakers of mobile phones to large Hi-Fi types.

  1. Sensitivity (S0)
  2. Impedance (Z0)
  3. Lowest resonance frequency (f0)
  4. Polarity (P0)
  5. Sound pressure frequency response
  6. Total harmonic distortion (THD), 2nd and 3rd harmonic distortions
  7. Rub and buzz characteristics
  8. Impedance characteristics
  9. Phase characteristics
  10. Isolation test (option)
    Isolation test between voice coil and frame while driving speaker

If voltages are the same, tests all items in 1 sweep, and if voltages are different, sweep and measure at each voltage.

S-255 SYSTEM

BASIC SYSTEM DIAGRAM

The measurement unit has one enclosure for the 20W model, and two enclosures for the 50W and 100W models; the measurement unit and the power amplifier. The entire system is composed of the PC, microphone, anechoic chamber and jig, etc. Software is installed on your PC.

OTHER FUNCTIONS

Test Data Application

Statistical processing of all test data in real-time online. Outputs average, standard deviation, CP, CPK, histogram, Pareto chart, etc. Create a database for quality control.

FFT analyzer / RTA

High-precision FFT analyzer (frequency, level, time and 3D analysis).
Realtime Spectrum Analyzer.

Support for 3 Types

Option for testing speakers, sounders and vibrators by one system.

BASIC HARDWARE COMPOSITION

S-255 Measurement Unit

  • Standard Model: S2551A
  • 50W Power Amplifier Built-in One Body Model: S2552B

Power Amplifier

  • High Power (100W) Separate Type Amplifier Model: S2533

Accessories

  • Remote Control (with display)
  • Isolation Test Unit (with software): S2507A
  • HDD Backup Kit (with software)
  • Microphones Various Types
  • Artificial Ear with Built-in 1/2″ Microphone: A-1508
  • Anechoic Box (for testing speakers)
  • Small size (aprox. 43 L): A-1602
  • Medium size (aprox. 140 L): A-1601
  • Uninterruptible Power Supply 100 ~ 120 V 600 VA / 1kVA

S-255 JUDGMENT WINDOW EXAMPLE

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