High Pass Filter

Simple. After listening to it, I ordered a second one for my main system. Everyone who runs small speakers with a sub should have one of these. Cleans up the midrange when levels get into the 80's.

HSU team extremely helpful, make a great product

I bought the VTF-TN1 and it has been stellar! I paired it with a sub I had built a while ago that I was not quite ready to give up on. I know about and use DSP but for some things I prefer hardware solutions. As well as my HSU sub sounded I figured I would go back to the well. The sales team was patient and worked with me and got me a custom filter for my sub that rolls it off at either 22hz or 18hz. It works flawlessly and sounds great. It keeps my amatuer attempt from self destructing while trying to keep up with HSU sub when things get infrasonic. And it does it very transparently.

Great item for my system!

This item works great and helped make some very small single driver desktop speakers shine by keep bass away from them before amplification.