Connecting a Pleiades R,L filter to Pleiades V6

It can be connected in turn to any primary winding by a switch.


So that with one Pleiades R,L filter 2 slopes are created.


Proximity compensation when needed can be done by choosing the primary winding.


For example the 140mH primary winding suitable for the Grampian DP4/L 25Ω may be suitable for the Sennheuser MD441 U3 when the Pleiades 130Ω,40mH is added in parallel to them.


When the MD441 is to be used at a greater distance it can be connected to the (600mH)? Primary winding. This can be the 200Ω winding suit and also for the Sennheiser MD211.