Massimiliano Camboni Electroacoustics
E A M S
Electro-Acoustic Measurement System



Key features:

Three operating modes:
  • Simple impedance curve measurement in the 10 Hz - 10 KHz range - for generic purposes, such as trimming the tuning frequency of vented enclosures.
  • Paralllel RLC-bridge measurement - for measuring capacitors and inductors to be used in cross-over filters.
  • Thiele-Small parameters measurement - for a suitable loudspeaker modeling for low-frequency response simulations.

Easy to use!
  • Automatic system calibration to linearise the frequency response of your soundcard.
  • Assisted levels calibration to tune the input ond output levels of your soundcard.
  • Automatic soundcard sampling delay detection and compensation.
  • User-selectable full-scale limit up to 1000 Ohm allows trading between accuracy and instrument range.
  • System setup and calibration takes less than 5 minutes.
  • Calibrate just once, then use as many times as you want.
  • Impedance measurement takes less than 30 seconds.
  • Automatic loudspeaker parameters measurement using the added-mass method takes less than 1 minute.
  • Automatic loudspeaker parameters measurement using the delta-compliance method takes less than 1 minute.
  • Graphs export in Bitmap (BMP) graphical format.
  • Parameters and graph data export in MS Excel-compatible CSV format.
  • Exclusive *.EAM file format exports impedance curves and loudspeaker parameters to LRSS simulation software.
  • MKS units.
Did you know?
  • The faster way to achieve best loudspeaker performances is to design systems through simulations?
  • You cannot run loudspeakers simulations without knowing parameters?
  • Many cheap loudspeakers have very high quality to price ratio, but the absence of known patrameters prevent simulation-supported design?
  • Loudspeakers which come with manufacturer-rated parameters usually have mismatches up to +/-10% and even more?
  • To design crossover filters with custom crossing frequencies you need accurtely tuned inductors and capacitors?
  • Commercial inductors and capacitors for cross-over filters usually have +/-5% and even +/-10% tolerance?
  • EAMS suite for measurement is the solution!
Benefits:
  • Save money by winding by yourself and fine-tuning to their required values the inductors to be used in crossover networks!
  • Increase the performance of your loudspeaker systems designs through simulations, also when using loudspeakers which come with no parameters from manufacturers!
  • Low overall system price makes EAMS affordable for every loudspeakers do-it-yourself hobbyst!
  • Very high measurement accuracy (typically about +/-1%) makes EAMS also suitable for semi-professional and professional use!
  • Car-audio installers and custom loudspeaker builders can get significant improvements in the quality of their installations!
  • EAMS system can profitably be used by loudspeakers manufacturers for quality testing of drivers to comply the product specifications!
Hardware requirements:
  • IBM-Compatible PC, 500 MHz or faster, 128 MB RAM or more.
  • MicroSoft 32-bit OSs (Win 95, Win 98, ME, NT 4, 2000, XP)
  • Full-duplex soundcard featuring Line-OUT and Line-IN mini-jack plug connectors.
  • External LPMS/EAMS amplifying and signal adapting unit.
  • DEMO mode allows using the system with limited functionalities to verify the PC and soundcard compatibility.
  • Key code is needed to run fully-featured mode.

392 Ohm rated resistor (linearity test after calibration).



Ciare 10" woofer.



Mid-woofer GME PRO 5200 VG-8 Mounted in reflex enclosure (Tuning at 57 Hz).




External EAMS signal conditioning unit


Download EAMS system software version 1.5

EAMS installation disk number 1 (720 KB)

EAMS installation disk number 2 (720 KB)

EAMS installation disk number 3 (720 KB)

EAMS software requires an installation validation code to unlock its full functionalities.
Not validated EAMS installations work in DEMO mode and allow system calibration and simple impedance curve measurements.
Use the software in EMO mode to ensute the compatibility of your PC and soundcard with the EAMS system.


Download EAMS system user manual:

EAMS manual (800 KB)

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