| Attribute | Value |
| Length | 260 mm |
| Weight | 740 g |
| Name | Ningbo Alctron Electronics Co., Ltd. STM400 |
| Brand | Ningbo Alctron Electronics Co., Ltd. |
| Pickup Pattern | - Blumlein
- Side Stereo
- X/Y Stereo
|
| Sensitivity | 15.8 mV/Pa |
| Range | 20 - 20,000 Hz |
| Capsule Diameter | 32 mm |
| Diaphragm Diameter | 25 mm |
| Sound Pressure Level (SPL) | 145 dB |
| Self-Noise | 18 dB |
| SPL/Self-Noise Ratio | 8.06 |
| Max Diameter | 46 mm |
| Interfaces | |
| Pads | Add |
| Filters | Add |
| Diaphragm Gauge | Add |
| Impedance | Add |
| Requires Phantom Power | Add |
| Phantom Voltage | Add |
| Includes Tube Power Supply | Add |
| Has Battery Compartment | Add |
| Battery compartment type | Add |