| Model ID | Earspeaker SR-40 |
| Form Factor | Headphone - Supra-aural |
| Signal Path | Passive Hardware |
| Weight | 250g |
| Frequency Response | 25Hz-25kHz |
| Type | Push-Pull Electret |
| Electrostatic Capacity | 110pF (Including Cord) |
| Impedance (10kHz) | 150kΩ |
| Sensitivity | 95dB/100Vrms |
| Maximum Output Sound Level | 110dB |
| Channel Indication | Cord Coloring and Indicator Plate |
| Ear Pads | Soft Vinyl, Pressure Type, Replacable |
| Headband | 18-8 Stainless Steel, Adjustable |
| Cord | 2.5m (4-parallel-strand, Low capacitance) |
| Channels | 2 Channel |
| Connections | - Input · DIN · Stereo, Plug (Male), Cable Mount
|
| Notes | Requires electret earspeaker adapter. Sold with SRD-4 as the SR-44 electret earspeaker system. |
