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Measured at: 07.01.2018 16:55:51

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

Behringer ECM8000 SN #170503502

Name: Behringer ECM8000 Custom Calibrated (SN: 170503502, Grade B)
Brand: Behringer
SKU: 170503502
Price: 129.00 EUR
Availability: OutOfStock

Official APx555 pressure-chamber test report for Behringer ECM8000 SN #170503502 (Grade B, IEC 61672-1 Class 2 up to 10 kHz, bass span 1.42 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 +2.08 dB (@ 13519 Hz).

Bass Span (31–250 Hz)

Δ 1.42 dB

LFE / Subwoofer accuracy

Midrange Span

Δ 0.65 dB

Reference vocal/mid band

HF-Peak (≤ 12 kHz)

+1.97 dB

@ 8020 Hz (Max: +2.08 dB)

Sensitivity (1 kHz)

9.29 mV/Pa

Offset: -40.6 dBV/Pa

IEC 61672-1 Tolerance Classification by Frequency Band

Minimum (50 Hz – 7.5 kHz)

🛡️ IEC Class 2

RMS: 0.76 dB

Standard (31.5 Hz – 10 kHz)

🛡️ IEC Class 2

RMS: 0.91 dB

Chamber Limit (to 12 kHz)

🛡️ IEC Class 2

RMS: 0.95 dB

Extended (to 16 kHz)

🛡️ IEC Class 2

RMS: 0.99 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 0.05 dB).

Direct Order / Quote

#170503502

Grade B

Base price: 129,00 € incl. 19% VAT (108,40 € 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 #170503502 (Grade B) 129,00 €

Total Amount: incl. 19% VAT

129,00 € Net: 108,40 € excl. 19% VAT