A few extra items that don't belong to any category
It is a Damping Factor Adjuster. Which adjusts damping factor of an amplifier to suit various speaker demand. It is like having a tube amp and solid-state amp at the same time and instant adjustable between the two.
The dials allow the user fine tune the damping factor to the exact point. The bypass switch allow instant A/B compare with and without the damping factor in line.
Damping Factor Controllers
Models: DF1, DF8 and DF16
These are damping factor device similar to the DFA 1-4. However, these models have a fix value of Damping Factor. DF1 will adjust the damping factor equal to 1. DF8 to damping factor to 8 and DF16 to 16. Designed to be install in line with the speaker cable. It can either install at the amp end or the speaker ends.
In Line Balanced Fix Attenuators
Available in XLR and RCA terminations
-6db, -10db, -15db, -20db
To decrease the overall gain of the power amp or integrated amp which allow the use of the upper part of the volume control for more accuracy and better dynamic.