In your case, it sounds like you’ve had success using the DFX Audio Enhancer to boost the volume on your Hi12 for films and TV shows with lower audio levels.
It’s important to note that the free version of the software does have some limitations, such as the maximum slider setting of 5 that you mentioned. However, it’s still a great option for those who are looking for a free and easy-to-use volume booster.
Another option that some users may want to consider is the Volume Booster Chrome extension. This extension can help to boost the volume on your Chrome browser, allowing you to enjoy louder audio while streaming videos or music online. Try volumebooster.io
It’s free to download and use, and can be a handy tool for those who spend a lot of time browsing the web on their computer.