Thank you for your continued patronage of our products.
We have revised the specifications for the MI-1531. Previously, the specifications for the MI-1531 were listed as the performance of the microphone alone, but this product is used in combination with the MI-3140 preamplifier. The actual performance of the 1/4-inch microphone is determined by the combination of the MI-1531 and MI-3140.
Because the individual product specifications may be misleading, we will revise the specifications to officially reflect the product when combined with the MI-3140.
Additionally, there was an error in the description of the insertion loss in the specifications for the MI-3140 preamplifier, which we have corrected.
We sincerely apologize for any inconvenience caused to our customers. We appreciate your understanding.
Specification revision
For detailed specifications, please refer to the product homepage.
MI-1531 1/4-inch Free-Field Electret Condenser Microphone
| |
Before change |
After the change |
| Frequency range (based on 250 Hz) |
Without protective grid:
10 Hz to 40 kHz (±1 dB)
10 Hz to 100 kHz (+2 dB, -4 dB) |
Without protective grid:
10 Hz to 40 kHz (±2 dB)
10 Hz to 100 kHz (+2 dB, -4 dB) |
| Maximum sound pressure level |
166 dB |
157 dB (when using MI-3140) |
| Self-noise level (A-weighted) |
30 dB |
37 dB (typical value) (when using MI-3140) |
| Operating temperature range |
-40 ℃～+150 ℃ |
-30 °C to +60 °C (when using MI-3140) |
Correction of errors
MI-3140 1/4-inch Measuring Microphone Preamplifier
| |
Before change |
After the change |
| Insertion loss |
0.25 dB (typical value) |
0.35 dB (typical value) |
Regarding inquiries
If you have any questions, please contact our customer service department or your nearest sales office.
