Partly passive preamp?


I’ve been using an Audio Research LS22 preamp with my Krell duo 175xd power amp. I also use an Audio Research PH3 phono stage.   Since the ARC preamp is about 25 years old, I’ve thought of replacing it. First, I decided to connect my PS Audio Directstream DAC directly to the Krell amp to see if it made a difference (the DirectStream has a good volume control).  It sounds great.  If I never wanted to use my turntable and tuner again, I’d consider sticking with this setup.  My question: is there such a thing as a preamp which would allow me to use my other equipment but does nothing to the signal coming from the dac...which is essentially passive when using the dac input?  
fast
fast My question: is there such a thing as a preamp which would allow me to use my other equipment but does nothing to the signal coming from the dac
My product does just that, but it’s one input only, you need one of these in front of it.https://goldpt.com/sw4.html
Cheers George
There’s a Placette passive pre on US Audio Mart for $1400 that has three inputs and is about as transparent as it gets.

I’d also highly recommend a Bryston BP-6, which I owned for years, that is active but is the epitome of the term “straight wire with gain” as it is the most open and transparent component I’ve ever heard.  This and the Placette are both single ended, but if you need/want balanced connections the Bryston BP-26 would give you that option.  There are some BP-6 and 26 pres available on eBay right now if you’re interested.  Given what you’re looking for I think you’ll be thrilled with any of these.  Hope this helps, and best of luck in your search. 
I’m not aware of any commercial product that does that (multiple inputs, pure passthrough on one input, active + volume control on others).

Otherwise you’d be talking about finding a new preamp (or high quality integrated) that equals or exceeds the performance that you get running your DAC direct, and ditto for your phono. 25 years is a good amount of time to justify an upgrade, I’d say!