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This Item  NOYITO 12V High-fidelity Microphone Pickup Module Noise Reduction Microphone Amplifier Board High Sensitivity Kit - Adjustable sensitivity |  |  |  | |
| Price | $8.99 | $7.59 | $5.99 | -31% $242.19 List: $349.99 |
| Delivery | Get it as soon as Monday, Jul 22 | Get it as soon as Tuesday, Jul 23 | Get it as soon as Monday, Jul 22 | Get it as soon as Monday, Jul 22 |
| Customer Ratings | ||||
| Sold By | NOYITO TECHNOLOGIES | uxcell | Aloway | Amazon.com |
| power source | DC Power Supply | Corded Electric | Corded Electric | Requires +24V or + 48V Phantom Power |
| connectivity tech | Auxiliary | — | XLR | XLR |
| connector type | Pins | 3.5 mm Jack | — | XLR |
| model number | NOHF12MICP5896 | a15031100ux0125 | 7545901056 | 988-000489 |
| material | Metal | Silver | — | — |
| audio sensitivity | — | — | -48 decibels | 25 decibels |
| frequency response | 20 KHz | — | 20 KHz | — |
| noise level | — | — | 58 decibels | 25 decibels |
| signal-to-noise ratio | — | 75 decibels | 58 decibels | — |
| hardware platform | — | — | Arduino | Camera, PC |
| polar pattern | Unidirectional | Unidirectional | Unidirectional | Super Cardioid |
Reviews with images
Poor Design and build
After examining this preamp I did not even bother powering it up. I expected this to be a basic design found in any elementary design text, or even Google! But no, instead it's some nearly random collection of parts. So here's a fairly technical overview. Sigh, so where do I start listing the design problems?Several other reviewers had already noted the reversed red and black wiring on the power connector. I could live with that.Excessive decoupling on the microphone biasing, I could live with that too.But, incorrect biasing on the first op amp stage, and a pot that can take the gain negative. Op amps don't like that.The designer wasted the second op amp stage as a unity gain buffer. Should have spread out the gain structure between the two. But maybe that's just as well; two poorly-biased stages would be worse than one!A strange resistor R8 to AC ground. Is the first op amp unhappy and this is a fix?The photos show the "NE5532" IC in a socket. Nope, mine was soldered in.Huh, "NE5532" is in quotes? Yep, last but not least, the IC is a counterfeit, fake part! This is because there are no input protection diodes which the real parts have. Quite strange as genuine NE5532 are not that expensive, and the seller wants nearly US$9 for this preamp board.Here's the not-surprising ending: I am returning this preamp board for a refund!
Top reviews from the United States
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Reviewed in the United States on March 17, 2024
Reviewed in the United States on July 18, 2020
Reviewed in the United States on June 9, 2022
After examining this preamp I did not even bother powering it up. I expected this to be a basic design found in any elementary design text, or even Google! But no, instead it's some nearly random collection of parts. So here's a fairly technical overview. Sigh, so where do I start listing the design problems?
Several other reviewers had already noted the reversed red and black wiring on the power connector. I could live with that.
Excessive decoupling on the microphone biasing, I could live with that too.
But, incorrect biasing on the first op amp stage, and a pot that can take the gain negative. Op amps don't like that.
The designer wasted the second op amp stage as a unity gain buffer. Should have spread out the gain structure between the two. But maybe that's just as well; two poorly-biased stages would be worse than one!
A strange resistor R8 to AC ground. Is the first op amp unhappy and this is a fix?
The photos show the "NE5532" IC in a socket. Nope, mine was soldered in.
Huh, "NE5532" is in quotes? Yep, last but not least, the IC is a counterfeit, fake part! This is because there are no input protection diodes which the real parts have. Quite strange as genuine NE5532 are not that expensive, and the seller wants nearly US$9 for this preamp board.
Here's the not-surprising ending: I am returning this preamp board for a refund!
Several other reviewers had already noted the reversed red and black wiring on the power connector. I could live with that.
Excessive decoupling on the microphone biasing, I could live with that too.
But, incorrect biasing on the first op amp stage, and a pot that can take the gain negative. Op amps don't like that.
The designer wasted the second op amp stage as a unity gain buffer. Should have spread out the gain structure between the two. But maybe that's just as well; two poorly-biased stages would be worse than one!
A strange resistor R8 to AC ground. Is the first op amp unhappy and this is a fix?
The photos show the "NE5532" IC in a socket. Nope, mine was soldered in.
Huh, "NE5532" is in quotes? Yep, last but not least, the IC is a counterfeit, fake part! This is because there are no input protection diodes which the real parts have. Quite strange as genuine NE5532 are not that expensive, and the seller wants nearly US$9 for this preamp board.
Here's the not-surprising ending: I am returning this preamp board for a refund!
Images in this review
Reviewed in the United States on October 29, 2019