| Attribute | Ningbo Alctron Electronics Co., Ltd. HST-11A × | Bock Audio 251 × |
|---|---|---|
| Capsule Diameter (mm) | 32 | - |
| SPL/Self-Noise Ratio | 6 | - |
| Self-Noise (dB) | 20 | - |
| Name | Ningbo Alctron Electronics Co., Ltd. HST-11A | Bock Audio 251 |
| Weight (g) | 824 | 716 |
| Pickup Pattern |
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|
| Brand | Ningbo Alctron Electronics Co., Ltd. | Bock Audio |
| Range (Hz) | 20 - 20,000 | 10 - 18,000 |
| Sensitivity (mV/Pa) | 25 | 19 |
| Impedance (Ohm) | 200 | 200 |
| Diaphragm Diameter (mm) | 26 | 25 |
| Sound Pressure Level (SPL) (dB) | 120 | 94 |
| Max Diameter (mm) | 46 | 52 |
| Interfaces |
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| Includes Tube Power Supply | + | + |
| Length (mm) | 240 | 216 |