GRS 12SW-4HE measurement review (high displacement per $ subwoofer chassis comparison)
Автор: stoneeh
Загружено: 2025-12-15
Просмотров: 791
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Measurement equipment, methodics, environment:
Software: ARTA, STEPS & LIMP
Soundcard: Creative X-Fi USB HD
Pre-Amp: IMG MPA-102
Microphone: Isemcon EMX-7150 (Class 1 FR; calibrated; Max. SPL 135 dB @ 1% THD)
SPL Calibrator: Isemcon SC-1 (Class 2, temperature & supply-voltage compensated; Accuracy +/- 0,5 dB)
Amplifier: Sinbosen FP10000Q V2
ARTA Measurement Box V3.2
Voltmeter w/ 1,5% accuracy
All acoustic measurements were performed in ground plane (ref.: Groundplane Acoustic Measurement of Loudspeaker Systems - Gander, AES, 1980), in a true outdoor enviroment, with no relevant obstacles to the wavelengths in question.
Calibration is tested / verified before and after each measurement series.
All measurements are repeated at least once, and the result only accepted as valid / reproducable if results from two or more measurements match perfectly (within tenths of a dB).
For the sensitivity measurement, amplifier voltage (Vrms) was determined with a sine signal.
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