[CurtisIIX]

DSPeaker Anti-mode 8033 Cinema

This is a fantastic little device to help with bass room correction. It is very easy to use.
I used this in a small 2.1 setup until I went 2.2 using Audiolense/Roon filters.

Microphone, power supply and manual are included
$160 135 plus shipping (UPS or USPS, your choice). No additional fees for Paypal.