TK Audio TF1 500 Series Filter

The TK Audio TF1 is a 500 series dual filter module with High-pass and low-pass filter.
The TK Audio TF1 offers two variable frequency control knobs with the Low-pass filter ranging from 30hz to 400Hz and the High-pass filter ranging from 100Hz all the way to 2.2kHz. Each band has a X10 button that multiplies the frequency points by a factor of ten, increasing the filtering band all the way up to 4kHz for the high-pass filter and 22.kHz.  Each band also includes a 6/12dB slope option. An In button lets you do A/B comparison.
TK Audio TF1 500 Series Filter Main Features:

Essential EQ control in convenient 500 series rack module
Individual highpass and lowpass filters with 6dB or 12dB slope for flexible tone shaping
A x10 switch on each section broadens your frequency range control