That video contains a lot of misinformation. The absolute signal strength has no effect on the sound quality. That data is found in the signal to noise ratio that he didn't address. This is not to say Audio Control makes a poor product - I ran a pair of their graphic equalizers for a few years.
If all someone is looking for is a LOC, then the best price/performance ratio I know of is with the David Navone products
David Navone is an old school audio engineer who advanced sound quality signifcantly in his prime. Once he teamed up with Richard Clark to try their hand at SPL contests and were promptly banned. Can't quite figure out why, maybe you can see something in the photo to give you a hint.