JBL PRX 912 review
Автор: stoneeh
Загружено: 2026-02-01
Просмотров: 93
Описание:
Measurement equipment, methodics, environment:
Software: ARTA
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)
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, on a flat, hard surface on a wind free day.
All acoustic measurements performed at 2 metres distance. GPM 2m equals 4pi 1m.
Calibration is tested / verified before & after the measurement series.
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).
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