Yes, >> I know if I owned those networks I'd swap out all the yellow caps for 250Volt MKP Solens ( as used by JBL ) .
I regularly listen to 400Volt MKP Solens ( dc-biased ) > BUT I do so at a drastically lower bias voltage ( compared to the STANDARD 9Volt DC Bias >> it's typically less than 1 Volt DC ).
Considering that you've stated that like what you hear ( due to swapping out the Elytones ) you would do yourself a ( educational ) favor by measuring your existing DC voltage ( from the center of any pair of caps to ground > using a multimeter ) to see what your voltage is at today.
- Remember that GT evolved the DC biased networks to being biased through a diodic "tap" taken from the LF drivers input voltage ( for when/if biamping is being used ).
- That form of variable biasing can result in a much lower dc voltage if ones normal listening habits are well controlled.
- It may turn out that you too prefer the sound of a lower bias voltage.
It takes a while for the caps to charge up to a full 9 volts after they've been discharged ( the charging slowness is due to the 2.2 meg resistor ).
- If your networks discharged when you were working on them // they might ( currently ) be only partially charged >> hence a lower bias voltage possibly being a contributing factor to a "different//preferred sound".
It's worth checking just to get a snap-shot ( reality-check ) to create a marker that's connected to your current satisfaction level.