Hi there, I would like to confirm that the set-up I have in mind would work.
I have an ADI-2 DAC FS connected to a Singxer SA-1 headphone amp and a pair of Focal Shape 65 active speakers.

I would like to connect a Y splitter to each of the adi-2's XLR outputs, one of them going to the amp and the other one to a
Hosa ATT-448 attenuator followed by a 1,5 m cable to the speaker.

The amp's input impedance is 2 kOhm.
The attenuator's unofficial input impedance is 1k and output of 150 ohm.
The Focal Shapes' input impedance is 10k.

The load the dac should see is 1/(1/20000+1/1000) = 952 Ohm. I have no idea if the amp's and speakers' input impedance applies when it's ON or all the time. There will always be only one device working at the time (although the attenuator's load is permanent, obviously).

So, I have two doubts. One is whether the splitting would cause any problem due to the resulting impedance. And the other one is whether it's too many connections that could interfere with the sound quality.
I could use the XLR outputs to the amp and the RCA ones to the speakers, but I haven't found an RCA attenuator with a >20db reduction. Also with the price of these things, I thought I should go all balanced rather than spending €100+ on unbalanced cables and attenuators.

Any advice is much appreciated, thanks in advance..