Endler stepped attenuator w/Cary active preamp

I have an idea for fixing a little problem, but don't know if it makes any sense (I have no background in electronics).

I had been running a Modwright Transporter directly w/balanced outputs to a big SS power amp w/no active pre. W/o attenuation, the volume was too loud at even the lowest levels and I could hear some hiss during quiet sections in music. I solved both problems w/Endler stepped attenuators. They almost completely eliminated the hiss and yet seemed to be transparent.

I just upgraded my system by adding a Cary SLP-05 active preamp. Huge improvment in dynamics, detail, soundstage, image weight, etc. Dramatic improvement, actually.

One downside, I can hear a hiss during quiet passages. Not super bad, but loud enough to notice. I tried using the built in attenuators (input control) on the CAry. It helped but did not completely fix the problem.

Anyway, because the Endlers fixed the hiss problem before, I thought I would try using them in conjunction w/the active pre. I will just give it a try, but wanted to know if that made sense? What problems should I look out for? Is this a common set-up? Etc. Any input will be much apprefciated. Thanks.