Benz Micro M2 loading

I'm using the Benz MO.9 which has impedance of 21ohms and an output of .9mV I've been giving it a load right around 250 and it loves it.

In my meridian 101 MM amp, I replaced the 47k ohm by a 1.82k ohm resistor. The bass gained in detail but lost weight and the trebble is a little less proeminent. I also noticed that the output level is lower. I like the bass but now sound lacks a bit of space and transient power.
There is a 100pF cap in parllel with the loading resistor... should I modify this value (or remove it) in order to regain transient power in high freq ?

Regards

Ricardo

Rcruz,

based on your experience it sounds like you might prefer a higher value like 4-10k