Thanks for the clarification.
You can't just randomly insert componenets in your system, no matter how fine they may be in other systems, and expect them to work in yours. Any change you make has to be with the entire system in mind.
Those other 2 preamps are simply not compatible with your current system unless they have provisions for lowering their gain. I don't see the sense of introducing a preamp that has more gain than your system needs and then trying to compensate with attenuators. If you are set on the rest of your components then you just need to audition preamps that have the proper amount of gain for your "system."
This is not the case with my current preamp but I have now auditioned two different (tube) preamps which both had this same extreme volume issue.
You can't just randomly insert componenets in your system, no matter how fine they may be in other systems, and expect them to work in yours. Any change you make has to be with the entire system in mind.
Those other 2 preamps are simply not compatible with your current system unless they have provisions for lowering their gain. I don't see the sense of introducing a preamp that has more gain than your system needs and then trying to compensate with attenuators. If you are set on the rest of your components then you just need to audition preamps that have the proper amount of gain for your "system."