I alternate between passive and active preamps and find that the difference is that usually described, active better dynamics, passive more transparency less coloration. But with good equipment the differences are not earthshaking. I am not absolutely positive that I could pass a blind test as to which was playing if I didn't have the other to compare. But one thing is clear, passive gives you more bang for the buck. In Martin Colloms testing the Creek 21 and 22 placed ahead or a lot of Krell, Audio Research, Conrad Johnson, etc active preamps. All this is contingent on your CD player having an output stage that will drive a power amp and a power amp with reasonable input sensitivity. My Meridian 605s only need .5 volts.
Do all Passive preamps exhibit this trait
I have a Adcom GFP-750 passive/active preamp which sounds somewhat recessed in the treble region when used in passive mode. It's active mode sounds harsh and fatiguing in the treble but there's certainly more detail and extension. I'm wondering if these traits are symtomatic to varying degrees with all passive preamps compared to active preamps. I love the GFP-750 in passive mode but sometimes I do wish for more extension in the treble region. Does anyone know of a passive preamp that will provide me with this treble extension and at the same time sounds relaxed with no listener fatigue. Thanks.