What is the quietest preamp you've used?


Can you also please tell me whether you were using balanced or se ins/outs? Thanks.
matti
My Rowland Coherence II. It is battery-powered and dead quiet. It is a fully differential balanced design.

You pose a very important question. It was not until I lived with a super-quiet preamp that I understood the importance of noise to a preamp's performance -- low noise is crucial to high performance in a preamp.
Creek OBH-12
Creek guarantees it to not affect the music one bit.
Totally passive unit.
The most quiet was my old (now almost 23 years) Perrauex SM2 bought in 1983. It was a slim design and was a highly regarded pre amp. Although extremely quiet with almost no noise or hiss... with comparison by todays pre amps its most likely anything but neutral.