maybe some of you folks can help me on deciding wether to remove or not the R141 resistor to lower my NCores gain.
My system consists of a Nad M51 and 4 NCore modules bi-amping my Quadral Aurum Titan VII speakers (ca. 90db).
The NCores have a sensitivity of 2V and - at least on paper - the Nad M51 has an output rating of 4V on XLR if I am not wrong.
Without removing the resistor my lusual istening levels move between -50 and -25 db for low to pretty much appartment shaking output levels.
As I understand it, removing the resistor would lower the NCores gain from 26 to 13 db. What i am unsure of is, if the NCores gain correlates directly to the Nad M51 attenuation. Meaning, if I remove the resistor the Nads attenuation would be lowered by the exact same 13 db the resistor removal would lower the NCores gain. In my situation resulting in a future attenuation on the Nad M51 to approximately -37 to -12 db instead of the current -50 to -25 db (13 db difference equalling the R141 resistors 13 db gain). Which shoud be enough headroom for loud playing levels.
Also comparing the NCores input sensitivity to the Nads output rating (2V vs 4V), removing the resistor should, at least in theory, put the two into a perfect match, halving the NCores input sensitivity from 2V to 4V. Or am I mixing things up in relation to gain and logarithmics also being relevant in this place???
What I am afraid of is, that removing the resistor would not leave me with enough gain to still play my music on pretty loud levels...
Any first hand experience anyone? Or some help otherwise...
Thanks in advance!