Balanced Armature Driver HE-31751-000 2-Way Woofer / Tweeter Product Data Sheet Product Features: Wide bandwidth High Output SPL Customization possible (crossover, damping, porting, etc.) RoHS compliant Outline Drawing mm (inches) Demonstrator Earphone Model Number (standard sample in BOLD) without MIC with MIC Straight Cable TC-7178-B37 Not Available Ordering Information: Phone: (630) 250-5100 Knowles Model Number: HE-31751-000 Fax: (630) 250-0575 1151 Maplewood Drive info knowles.com Itasca, Illinois 60143 knowles.comBalanced Armature Driver HE-31751-000 2-Way Woofer / Tweeter Frequency Response and THD Impedance and Saturation SPL Testing Conditions Typical Performance at 1kHz Impedance 112 Ohms using 100mV rms drive signal Sensitivity to 100mV 112 dB SPL IEC60318-4 (711) coupler with DB2012 adapter Sensitivity to 1mW 123 dB SPL G.R.A.S. 43BA-2 (0.4cc) with baffle adapter a Max SPL 132 dB SPL THD THD at 94dB SPL 0.1 % THD at 100dB SPL 0.2 % Footnotes: a SPL at 10% THD Note: Ask about cust om assembly options (lead wires, customer-specified materials, etc.) To prevent heat damage, follow soldering guidelines in application note AN13 (knowles.com) Measurement data for reference only. Refer to model specification for full dimensions and performance. Ordering Information: Phone: (630) 250-5100 Knowles Model Number: HE-31751-000 Fax: (630) 250-0575 1151 Maplewood Drive info knowles.com Itasca, Illinois 60143 knowles.com