Anybody use a single ended component with one that is balanced?

Just receive the RCA to XLR cable.  When I hooked on, the voice sound is a little small than my RCA to RCA cable, the instrument music is still loud. Totally speaking ,the sound is very beautiful, only  the mid sound a little weak. I do not know the reason, maybe need cable break in.   My amplifier right now is Audio Research VT100 Mk III.

By the way, I have balanced Pre( Audio research Ls25 Mk1 and Ls 25 Mk2),  but I do love this unbalanced pre(I rather do not tell),the sound is very beautiful.

After one hour listen,I give up.

If the power amplifier do not have the RCA socket,you better do couple with balanced pre.

Right now,I have 2 system

1, Audio Research LS25 MK2 + Audio Research REF 75se

2, RCA pre + audio research VT100 MKiii

If we are talking about the sound, I really prefer No.2 set,I can listen the whole day until I really need sleep.

For No.1, I do not have that feeling,and it is just start,I will see.

I think the point is that just using physical/passive jack adapters  - whether dongles or cables -- has the potential to produce suboptimal sound depending on the topology of the units.  It's not always the case but it can be.  

Better to use same jack type on both output and input, or to use an active conversion process like in the Tascam LA-40.  I know, I know, it's not in the pantheon of classic Rated A components but it really does not impact the sound...it simply allows me to use balanced for a long run between my preamp and active crossover in my bi-amped system.