When using a Bart NTMB, a 25k vol. pot is called for. When installing an active/passive push/pull volume pot, a 250k is used. I understand why, in passive mode, a 250k is necessary. But, how does this affect the active sound? It seems odd that a 250k pot could be substituted for a 25k pot. Is there enough adjustment on the trim control on the preamp to account for this? And, one more question: does the passive/active switch cause a "pop" when switching between modes? Thanks in advance. Matt.