I have been curious lately about using a passive pre-amp. i currently use the Adcom GFA-565 in my main 2 ch rig. This is used in conjunction with an Adcom GFA555II and SRS 1.2TL's. I understand the GFA750 to be either passive or active depending on user selection of this function. Adcom also made an SLC unit which is strictly passive. I know the 750 is very highly regarded. But is this for the passive operation or its active operation or due to it being selectable for use either way? Is the SLC unit good as a passive unit? And lastly am I wasting my time considering this?
I have no experience with any passive pre's and am historically used to the Adcom gear I have mentioned above along with carver C-1 and 4.0T, C-2 and 1.0 some Macintosh gear and mostly Vintage Marantz pre's like the 7T, 3250 and some other Marantz integrated in other systems i have through the house. For general listening I usually prefer the sound of the vintage marantz gear but find the bass end a little loose for the Polks. I am trying to determine if i may like the passive pre's or not. I know my ears will naturally be the best judge in the end. I do prefer the Adcom gear best for critical listening, of all my other gear.