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Beginner’s knockblock buying help!

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Good day to all of you in the community! I whould like to ask from your experience which knockblock whould be the best choice for someone who is starting in tuning industry! Plex equipment is a renowned here in Greece but is a bit expensive for someone that is starting right now! I now of the phormula product and the G4+ knockblock and the knockbox product! Also through my search online i’ve seen some DIY knock detection amplifiers. Does it worth it to go the DIY way? Are they reliable? Should I spend money on a fairly priced knockblock or it whould better to go directly to the top shelf products? For starters the use i’m Going to do is tune my own cars + some friends and maybe later going pro!

I know a lot of tuners who use the old tech det cans, as described here:


There's also the computer based Tuner Tools Knock Monitor:


Personally I'm using Phormula KS4 pro kit with a Link G4 Knock Block for the audio

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