Parasound Zpre3 SQ

I've found on multiple tracks that the vocals disappear entirely.

I purchased the Zpre3 new and never found the mid-to-high frequencies to be a problem. Its clarity and richness in the mids and highs made me a believer in preamps. When I connected the DAC directly to the amp, the bass came back alive. I think this has something to do with the Zpre3's higher output impedance (470 ohms compared to 75 ohms in the Saga), which might be softening the bass.

To compensate, I’ve been boosting the bass by +2 to +3 on the Zpre3 to achieve a tonal balance equivalent to the direct connection, but the texture of the bass still suffers. The Lokius might be a solution, but I personally prefer transparency over a colored tone. Hopefully, the Saga 2 will resolve that deficiency.

This seems to be amplified by the tone controls of this specific Zpre3.  Anytime the bass is modified at all is when the sound really begins to distort.  This isn't uniform with any of the Parasound gear I've owned previously.  So, it sounds like I have a unit that could be damaged.  Looks like it might be something that needs to get sent in for repair then.

I have a Zpre3 in a fairly good system. It's not a bad preamp but it's not that spectacular. Not even close to my old PHP850. Your unit seems to be not up to specifications. Perhaps change your interconnects to isolate the problem.

The feedback I've seen on the pre is that it's decent enough.  I shouldn't be having the issues I'm having.  I should note, that when I put the NC 200 in place of the ZPre3 - the issues do not occur, so it is absolutely associated with the ZPre3 or something inside of it - not interconnects or other components.  The Pre only needs to function for the tone controls in the system I'm building for now - it's just unfortunate that it seems that's what the actual problem is tied to.