Passive preamps - differences between technologies


Hello!

I have been wondering what are the main differences in the way some passive preamps are designed. 

Some have resistors, some are transformer based.. What are the pros/cons?

More specifically, I'm looking at Music First Classic/Baby Reference V2 vs Hattor the Big or a Tortuga.

I'm looking for an upgrade from Audio Research LS16, considering looking for ARC Ref3 or a nice passive. My amp is ARC Ref150 (which is a lovely thing and I feel like the LS16 is holding it back) and phono pre is RCM sensor2 mk2 - so there's enough gain from the phono, the power amp has 300k ohms input, my DAC can output 1-3V rms, I use interconnects up to 1m so a passive could be an option. 

Thank you. 

Greetings from Prague with the first snow

Filip

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Showing 1 response by carlsbad2

Passive preamps are simple but the quality of components can vary tremendously. Quality transformer based volume control (a passive preamp is basically volume control) are excellent and coveted.

a resistive ladder style can be excellent with good components.

Both are going to require a high quality multiple step selector switch.  

Avoid the sliding contact resistors as cheap and noisy.

I like passive vs active because it has the least impact on the signal (some of us call it coloration and some members here don't like that, we will agree to disagree).

Jerry