Monarchy DIP/Unsampler boxes effective tweak?

If the DAC does not reclock the data then the DIP can be very effective. Inserting the DIP between my Marantz CD67SE and Monarchy 22A DAC made more improvement to the sound than adding the DAC to the CD player had made.

If the DAC reclocks the data or if the transport has very low jitter then the improvement will probably be less marked.

I can't say whether a DIP would be better than an upsampler, but I'd probably choose a simple DIP as it will be less expensive and will give you an idea of how much your system benefits from reduced jitter.

Very effective, dejitters and softens the digital edge. There are some reviews posted on the Monarchy Audio site, check them out.
In may experience the Upsampler sounds better, but it does not work with all dacs. The DIPs do, however.

I bought a DIP Classic primarily for its s/pdif to AES/EBU conversion, but found to my surprise that it significantly improved the sound in my setup (Theta Miles > DIP > z-Sytems RDQ-1 or Behringer DEQ2496 > Benchmark DAC1). Not a night-and-day difference, but worthwhile to me. No experience with the upsampler.

If you can get your hands on a used Camelot Dragon it is even more wonderful