Grimm MU2 Experience

@ja_kub_sz   In addition to the volume control on the MU2 there is a setting for Fixed Volume or Device Volume in Roon.  This is accessed by the volume control icon to the right side of the music selection window on the bottom of the screen.  Select the gear icon on the menu.  Under Audio Device window hit the Device Setup.  Under the Volume Control drop down you can select DSC Volume, Fixed Volume or Device Volume.  Device Volume will communicate volume instructions to and from the MU2.  The Fixed Volume control will send a fixed signal to the MU2.  Volume can still be controlled in the MU2.  I am using an integrated amp, so I am using the fixed volume (line out) setting on the MU2, and I have selected +0.0 db as the level of signal output to the amp, and controlling the volume with my integrated amp.  Alternatively, you could set the volume on your pre-amp or integrated to a set level and use the volume control on the MU2 to control volume.  Although the gain on the MU2 goes to +8.0 dB, Grimm advises that there may be some distortion on the higher gain settings, so +0.0 dB is the recommended maximum setting on the MU2 which when Device Volume is selected equates to 92 in Roon.  On my system, using the Device Volume setting in Roon produces a more forward presentation but very detailed.  The Fixed volume setting in Roon on my system produces a wider and a bit less forward presentation but still preserves the incredible detail that the MU2 produces but with a more natural and engaging sound to my ears.  I have been flipping back and forth between the 2 settings.  I do like the Device Volume but it is more HIFI sounding on my system than the fixed volume.  Give it a try on your system.  I am not sure why there is a difference between the 2 settings but there certainly is on my system.  I am running a Trafomatic Rhapsody integrated amp and Wolf Von Langa Ultima 12739 speaker.

@wlp3 

Awesome, thank you so much for that advice. Like I said I'm very new to Roon, and every little suggestion helps. 

Absolutely love your combination of amplifier and speakers, that is such a well made pairing, I can only imagine how good that setup sounds.

@ja_kub_sz   Thank you.  Give it whirl on your system and see what you think.  You may prefer the Device Volume setting in Roon on your system.  On my system, the WVL speakers are so revealing and transparent that the Device Volume setting seems a bit etched to my ear, and the Fixed Volume setting is more natural sounding.  Again, YMMV.  

I must say that the MU2 has taken my system from excellent before to ethereal now.

I must say that the MU2 has taken my system from excellent before to ethereal now

I must say with the MU2 mid-range is the key element that jumps out to me with ethereal precision, accuracy and fluidity. That’s where the magic is and that’s where the bulk of music is happening.

@ja_kub_sz The MU2 just keeps getting better and it has taken 2.5 months for it to really blossom on my system.  I think you will find that bass and hf will get even better with time as well.