Passive pre-amp any good???

I have a Air Tight ATM-4, like to match this with a good /budget pre amp, need some advise,

I have the Air Tight ATL-10A passive pre-amp and Pass Lab L passive amp like to try, but any one use those pre-amp before/comment??

Any other suggestion??, Is the passive pre-amp any good??, Why some people like the passive pre-amp?? or the REGULAR pre-amp wuill be better??

Thanks a lot.