SPEKTRA Ready for TESTelligence! SQ-4.2Electro-Acoustic Coupler cogs ApplicationsCog Selected Data ✓ pressure chamber secondary calibration of microphones (IEC 61094-5) and dosimeters (IEC 61252) ✓ pressure chamber secondary calibration of sound level meters and sound level measuring chains (IEC 61672) ✓ wide frequency range: 31.5 Hz ... 20 kHz ✓ low distortion, even at low frequencies ✓ sound pressure level up to 134 dB at selected frequencies ✓ symmetric small pressure chamber lightbulb Features ✓ true pressure chamber calibration of 1/2" microphones ✓ calibration of dosimeters (diameter 1/2") ✓ calibration of measuring microphones (capacitor and electrets microphones 1/2 and 1/2" with adapter) ✓ supply of sound pressure level for the calibration of sound level meters and measuring chains ✓ including microphone and sound level meter fixture ✓ including power amplifier www.spektra-dresden.com | Latest update: 03/2024 | All data are subject to change without notice Page 1 / 2

All specification are at room temperature unless otherwise specified. * Depending on frequency range and short-term peak value. ✓ SQ 4.2 active electro-acoustic coupler ✓ power amplifier, including power plug and plug adapter ✓ microphone and sound level meter fixture ✓ LS adapter (open cartridge adapter for typical 1/2" microphones) Plus-hexagon Accessories (optional) Reference standards (recommended) 1/2" condenser microphone cartridge type LS1P or WS1P with amplifier LS adapter (open grid for WS2P Microphone) Optional calibration adapter calibration adapter for surface microphones www.spektra-dresden.com...