1pc Digital Microphone Amplifier Board PT2399 Karaoke Reverberation Module — Key Benefits Adds professionalsounding reverb/delay to vocal microphones using the PT2399 digital audio processor. Integrates microphone amplification and reverberation on a compact DIY PCB, so you can quickly upgrade a karaoke machine, PA system, or home studio. Solves the need for vocal presence and space: improves clarity and warmth, reduces dryness in live or recorded vocals, and makes performances more enjoyable without complex wiring or external rack effects. What this module does Combines a microphone amplifier stage with a PT2399based digital reverberation/delay circuit in a single PCB module. Designed for karaoke and vocal applications to deliver echo and reverb effects that enhance vocal performance and clarity. Ideal for hobbyists and technicians looking to add vocal effects to an existing amplifier or build a custom karaoke/OK system. Key attributes Model/Chip: PT2399 digital reverberation/delay processor. Functionality: Microphone preamplification plus digital reverb/echo processing for karaoke and vocal use. Power: Dual AC 12V input as specified (observe board labeling and wiring requirements). Form factor: PCB module designed for DIY electronic projects and system integration. Use: Karaoke OK amplifier module for vocal enhancement; suitable for modification and integration into existing audio systems. Compatibility and integration Intended for microphonelevel inputs and integration into amplifier or mixer chains for karaoke and small PA systems. PCB format allows straightforward mounting and wiring into DIY enclosures or existing amplifier chassis. Works as a dedicated vocal effects stage; can be placed between microphone input and power amplifier or integrated into preamp sections. Performance and build Uses the PT2399 digital audio chip known for musical delay/reverb characteristics suited to vocals. PCB module format simplifies installation for electronics hobbyists and AV technicians. Designed to be integrated into custom builds; intended for DIY electronic assembly and audio modification. Example use cases 1) Home karaoke upgrade: Install this module into a home karaoke unit or compact amplifier to add reverb/echo to the microphone channel and give vocals a fuller, more professional sound. 2) Small live PA or practice setup: Add the board between a microphone preamp and power amp to create naturalsounding vocal ambience for smallstage performances or rehearsal spaces. 3) DIY audio projects: Use the PCB in custom karaoke mixers, vocal processing pedals, or hobbyist audio builds to experiment with reverberation and delay effects using the PT2399 chip. What to expect in the package One (1) PT2399based digital microphone amplifier / reverberation PCB module for DIY and integration. Notes and precautions Observe the board's power labeling: this module specifies dual AC 12V. Verify the correct power source and wiring before connecting. As a DIY PCB module, basic soldering and electronics integration skills are recommended for safe installation and reliable operation. This description reflects the product title and included module features; consult the board silkscreen or seller documentation for exact pinouts and wiring details.