Preamplifier sound Quality impact in home theatre bypass

I’m wondering if insertion of a pre-amplifier between the AV processor and the amplifiers negatively impacts sound of home theatre. It has no impact on stereo listening since source of stereo sources are connected directly to the pre-amplifier and don't involve the AV processor.

This is done as part of my Home theatre bypass configuration and it works really well but I’m wondering if I’m diminishing openness of what I’m listening to.

I initially did this because I wanted the tube pre-amplifier to influence sound since I had a solid state amplifier. However now I have a tube amplifier and the benefits of the tube pre-amplifier may not be as much of an impact. However taking pre-amplifier out of the chain is not ideal.