These are my trusted (and highly recommended) tools, useful in any studio as well as in any pedalboard.
Funny combo, since they both "orange" =^.^=
The LEHLE P-SPLIT III ( https://support.lehle.com/en/lehle-p-split-iii ) is a well know swiss knife.
It can be a quality, super transparent and silent reamp box.
It can be a quality, super transparent and silent signal splitter/merger.
It can be a quality, super transparent and silent passive DI.
It can be a quality, super transparent and silent Line Isolator.
It can be a quality, super transparent and silent Balanced/unbalanced converter.
Etc.etc.
No matter what kind of rig do you have, no matter if live or studio, The LEHLE P-SPLIT III can help you !
The Orange Amp Detonator ( https://orangeamps.com/products/amp-detonator-buffered-aby-pedal )
is a quality, super transparent and silent ABY switcher pedal With a fully buffered circuit, isolated outputs
and phase correction.
Perfect for Amp switching (or running Parallel Amps).
Special mention
The Behringer FBQ3102HD ( https://www.behringer.com/en/products/0821-ABC )
This 2U Rack High-Definition 31-Band Stereo Graphic Equalizer, while being mainly used as a live/gigs tool, has a special use in my studio.
While not "directly involved as EQ" in the capture/profiling process, it runs in "parallel" ( thanks to the stereo/dual mono React:IR outputs ) and get the same signal the Tonex/Hotone is capturing/profiling.
This allows me to check (and fix before running the capture/profiling process) any "problematic frequencies and/or noises" by using the Behringer FBQ3102HD integrated FBQ Feedback Detection System.