I’m not sure why people feel the need to bash this. It not as if he’s spamming the forum like another company. Yes you can DiY but it seems there are those that would rather have the kit. So no reason not to have both ways available. I’m a DiYer and would make my own if I wanted more bass. But I don't. As far as the the low pass filter maybe he just added it and hasn’t updated the pics or whatever everyone is looking at. People need to smoke a Fattie or whatever they do to chill out a bit.
Just my 2 credits.