Featuring built-in compression and a noise gate, it provides superior performance compared to a standard op-amp. To enable full compression functionality, these resistors can be easily swapped (R1 should be 1k, and R2 should be 15k).
eBay
High Power Karaoke Bluetooth Speaker Portable 360 Stereo Surround Waterproof Wireless Subwoofer with 2 Mic Boombox music player
Aliexpress UK
GOOD USED WORKING CONDITION .REF:CD_25
eBay
Mic PA System Emergency Amplifier Hooter Speakers Loud Car Horn Police Siren Air Horn Megaphone Tone 12V 100W Car Warning Alarm
Aliexpress UK
HIGH GAIN: Mic preamplifier enhances your sound experience with balanced amplification circuitry with 20db gain, providing clean, transparent gain. 48V POWER: Mic preamp is compatible with a range of microphones, including for SM7B, for 55SH and other popular models.
eBay
New Computer Speakers PC Sound Box HIFI Stereo Microphone USB Wired Caixa De Som with LED Light for Desktop Wholesale Subwoofer
Aliexpress UK
For sale is a used MP-2 Stereo Tube Microphone Preamplifier from around the year 2002. It was built in the USA.Everything works as it should and it sounds exceptional. There maybe be a few minor scratches on the top of the unit but I did not take photos of the top as the item is very heavy and I did not want to remove the unit from the rack.
eBay
Owls 20W Powerful Wireless Bluetooth Speaker with Dual Mics Portable HIFI Sound Outdoor Family Party Karaoke Subwoofer Box Gifts
Aliexpress UK
The Fredenstein V.A.S. Mic Preamplifier is a compact and lightweight microphone preamplifier designed for professional audio applications. With an adjustable gain and fast transient response, it ensures clear and dynamic sound reproduction.
eBay
Edifier QS30 Computer Speakers Mini Soundbar USB Speakers Subwoofer Bluetooth 5.4 with Microphone RGB Lighting for PC Laptop
Aliexpress UK
Used but in great condition, tested working.
eBay
100W High Power RGB Pickup Rhythm Light Wireless Portable Microphone Bluetooth Speaker Sound Family Karaoke TF Subwoofer Ys-311
Aliexpress UK
The SM7dB is a built-in microphone preamp version of the classic microphone SM7B, which provides two levels of microphone preamp gain optional: +18dB/+28dB.
eBay
Bluetooth Speaker K12 Karaoke Machine Portable 5.3 PA Speaker System with Wireless Microphones Home Family Singing Children's
Aliexpress UK
Gain: 25dB. Professional microphone preamplifier that operates on 48V phantom power, but does not pass phantom power to the microphone. 1 x Professional Microphone Preamplifier. Noise: <3mv. Its black looking makes it classic and graceful.
eBay
Car Interior Speaker Microphone Metal Dustproof Protective Cover For BMW 1 2 3 4 5 6 7 Series X1 X2 X3 X4 X5 X6 X7 Accessories
Aliexpress UK