Okay, notice the "Deputy" under my name, so this may be a stupid question but...

There was a review of the M200 linked in a previous post that said "The frequency response is the only area I see room for improvement. It starts rolling off about 3 kHz, although it is down only 0.3 db at 20 kHz. The low end though suffers a bit, dropping 1 dB at 20 Hz. Perhaps this is an overzealous use of an input capacitor (these are commonly used to prevent DC from getting into the power amplifier from the preamplifier). I would suggest using a higher value to keep it reasonably flat to 20 Hz. It is not so much that you can't boost the low end with a tone control somewhere, but there is phase shift where you have frequency response rolloff."

Is this something that could be safely modified by an end user? Do you know if any of the parts connexion's mods address this issue?