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Measured at: 05.01.2018 13:15:22

APx555 Test Report & Pressure-Chamber Calibration GRADE C ⚪ Sold (Archive Reference)

Behringer ECM8000 SN #170503504

Name: Behringer ECM8000 Custom Calibrated (SN: 170503504, Grade C)
Brand: Behringer
SKU: 170503504
Price: 119.00 EUR
Availability: OutOfStock

Official APx555 pressure-chamber test report for Behringer ECM8000 SN #170503504 (Grade C, IEC 61672-1 Class 2 up to 10 kHz, bass span 1.69 dB).

Acoustic Assessment of this Capsule

The characteristic high-frequency peak is exceptionally flat for a 1/4-inch electret capsule, with a peak of only +2.69 dB (@ 8020 Hz).

Bass Span (31–250 Hz)

Δ 1.69 dB

LFE / Subwoofer accuracy

Midrange Span

Δ 0.57 dB

Reference vocal/mid band

HF-Peak (≤ 12 kHz)

+2.69 dB

@ 8020 Hz (Max: +2.69 dB)

Sensitivity (1 kHz)

11.45 mV/Pa

Offset: -38.8 dBV/Pa

IEC 61672-1 Tolerance Classification by Frequency Band

Minimum (50 Hz – 7.5 kHz)

🛡️ IEC Class 2

RMS: 0.92 dB

Standard (31.5 Hz – 10 kHz)

> Class 2

RMS: 1.12 dB

Chamber Limit (to 12 kHz)

> Class 2

RMS: 1.18 dB

Extended (to 16 kHz)

> Class 2

RMS: 1.22 dB

📄 Open Original APx555 PDF Report 📦 Download Original Calibration Data (ZIP)

🎧 Mathematical Stereo Twin (Matched Pair)

The closest acoustic twin in our database is SN #1706036 (RMS deviation up to 10 kHz: only 0.24 dB).

Direct Order / Quote

#170503504

Grade C

Base price: 119,00 € incl. 19% VAT (100,00 € excl. VAT)

Included in Base Price:

✓ Brand-new Behringer ECM8000 measurement microphone in carrying case
✓ Individual calibration file (.txt / .cal for REW, Akulap, ARTA, Smaart) for 0°
✓ APx555 measurement report (PDF) assigned to serial number

+50,00 € 📜 Signed Factory Calibration Certificate & Declaration of Conformity (ISO / IEC 61672-1)

The physical APx555 measurement is identical—you additionally receive our personally signed test certificate (PDF + printed original) with documented metrological traceability for your ISO 9001 quality management.

What exactly does the factory calibration certificate include?

Identical Precision Measurement – Formal Documentation: Every ECM8000 undergoes the exact same simultaneous 2-channel measurement. With this upgrade, you receive a formal document personally signed by Dr.-Ing. Frank Jordan including:

Declaration of Conformity: Written confirmation that your unit (serial number) complies with the frequency response tolerances of DIN EN / IEC 61672-1 (Class 1 or Class 2) within the specified band.
Proof of Traceability (ISO 9001): Complete documentation of our reference chain traceable to national standards (PTB / DAkkS) using Audio Precision APx555, G.R.A.S. 40AE Class 1, and B&K 4231.
Transparent Note on Accreditation: We are a specialized R&D and acoustic measurement laboratory, not an ISO/IEC 17025 accredited calibration body. However, thanks to our €50,000+ test bench (APx555 with -150 dB THD+N and simultaneous 2-channel IEC 61094-5 pressure chamber) and decades of DSP engineering expertise, our actual measurement precision and SNR surpass many accredited testing labs.

Optional Measurement Accessories:

+ Mini Tabletop Microphone Stand (Art. TPD_MINI)

+ 17,85 € (15,00 € excl. VAT)

Info ↗

+ Sound Level Calibrator 94 dB / 1 kHz (Art. 7007)

+ 145,00 € (121,85 € excl. VAT)

Info ↗

1x ECM8000 #170503504 (Grade C) 119,00 €

Total Amount: incl. 19% VAT

119,00 € Net: 100,00 € excl. 19% VAT