DX5 has an XLR out, it's just not balanced.

If you have stuff wired for 2.5, you can use a XLR-2.5 adapter, this what I use on my main amp for stuff I have wired for 2.5, it has XLR, 4.4 and 6.35. I leave that plugged in as I have stuff wired for 2.5, 4.4 and 6.35 but not XLR.

I also have 6.35->2.5 and 6.35->4.4 adapters, so I can use the balanced stuff on my single ended amps as well. This works in that direction, it's the other direction you can't go (balanced output to single ended).

You need 2.5 for the BTR5 and no desktop amp is going to have a 2.5 output so you need an adapter anyway. Like you usually need a 6.35->3.5 adapter for single ended, they are a bit bigger than those but same idea.

You can also get 3.5->2.5, if you got something like a Topping DX3 Pro+ that only has 3.5.