It’s my first time doing soldering in over 3 years ever since the pandemic I’ve been doing mods for classic consoles. I’m still getting the hang of it. Thank you!

TLDR; The amp works nicely but is cheaply manufactured. Put any pressure on the resistors and they will fall off the board.

Installation was a breeze, and it sounded pretty good-even with the OEM Game Boy Advance speaker. That is, it was good untill it mysteriously stopped working on day 3. After inspecting it, turns out one of the resistors fell off, and I was unable to find it. Additionally, as I was taking it out, I grabbed one of the resistors with my tweezers and the resistor practically slipped right off the board. Gentle pressure with my thumb slid away another one after that. Sad, as I had really enjoyed the sound quality it had before it died.

Like another, sound completely cuts out when the GBA wheel goes under 50% however very loud above 50% with no noticeable hissing/hum. Was an easy 5 min install with a new 2W speaker. There is a lack of info on adjusting the mini potentiometer one way or the other outside of using a 2mm flat screwdriver. It does what it's advertised to do - however some mini potentiometer adjustment info would save a lot of time and having to remove the GBA board repeatedly so I deducted a star. Otherwise this thing is now quite audible.

I was hesitant to upgrade the speakers for my GBA, but boy was I glad I got the Flex Amp. Don't really need a de-humm kit. Sounds great and loud. Easy to install. Highly recommend it.

The volume has increased drastically with this attachment. Easy to install and makes the games easy to hear.

Good quality flex board. Absolutely makes the console louder but the volume is off at what should be 50% (on the volume wheel) and suddenly begins working when increasing past 50%. Yes it does improve sound loudness and quality but at the price of introducing this quite frustrating issue. If I would have known this prior to purchasing I would've just saved the 13 dollars.