Volume problem with Passive Preamp


I have a Promethius passive and I use it in my office system. Unfortunately the volume "steps" are too great and even the first step plays the music louder than I want during the day. Is there any way to adjust the loudness of each of the volume steps easily?

GLR
glrtrgi
Parts Express sells in line attenuators (HARRISON) for about $35.00 a pair. They come in 3db,6db and 12db of attenuatuion.
Get a resitor DECADE box and experiment with the value until you get the level and range you want.
Than, get good resistors of the correct value.
It is a TVC correct?

Many of the aforementioned methods would work, but may interfere with the impedance characteristics of the device. That would in turn negate many of the TVC benefits. There may be a way to rewire or adjust it. I would take note of exactly what steps are too big, and call them.