I paired this with the Dehum and Dehiss kit which is a must. The NGPC is already a quiet system and has a lot of hiss similar to the GBA. The sound is really loud now, but also crisp and I'm using the OEM speaker. A very quick and easy install too.

I got two of each (CleanAmp Pro & Dehum/Dehiss) for my NGPC & NGPC Slim. The difference in sound quality, clarity & especially volume was night and day! I've used these kits before on Nintendo handhelds and the gains were worth it but modest - but for the NGPC it is a HUGE improvement over stock! Not only is the sound better overall but now even headphones are amazing (used to hate using headphones before since the quality was marginal at best and bad buzzing and hissing was constant). Installation was easy. 2 solder points for the speaker, 6 solder points for the amp & 3 solder points for the dehum - one of which is shared with one of the 6 points on the CleanAmp so really only 10 quick dabs of solder in total. Since it's wire free the actual positioning and soldering itself took 2-3 minutes!! 90% of my time was opening up the handheld and putting it back together afterwards. Soldering into the NGPC Slim was more work but that's because it wasn't designed for it, but RetroSix was kind enough to give me a photo showing how to install it in the Slim model with a few bits of wire. I couldn't be happier with the results!

(This review will be cross-posted on both the CleanAmp Pro and Dehum/Dehiss pages. I highly recommend you buy BOTH for the best possible results!)

Using it with the Dehum kit. It gets loud, and it's easy to install. Also using the original speaker, but put longer wires on it to make it easier to open and close the shell. At least for me it was made easier.

Installed with dehumm dehiss module and IPS upgrade. As with all the other CleanAmps I've used before it's a decent volume upgrade without distortion at high volumes. No complaints, works great.

This and the de-hum and hiss kit sold do an awesome job really cranking the volume up on the neo geo and giving you some awesome sound.

Just got in the mail. Installed it. Great sound. Don't know if I'll play it at full volume just because of battery but hopefully rechargable battery would come next. It's good it's worth it.