Passive volume regulator suggestions

I have read about several options, Lightspeed, Axiom Audio Luminous.
Lightspeed has dual resistor divider approach, loading less source output. On the other hand it does not have XLR in/outs. That is the main limitation.
Axiom has XLRs but is a single shunt resistor divider based, introducing lower impedance to source or making less regulation range.

I would appreciate for your thoughts and recommendations.