Tzh2ly..faster or slower?..easy to explain..which pertains more to the amp than the Preamp. The rate of speed from the amp's output to the Speaker is called the slew rate and is measured in milliseconds. The higher the number, the faster the signal to the speaker. Its like rpm's in a car engine. Amps with slower slew rates sound sluggish and dull. If you want the best sound qualities of tube and solid state amp performance and can afford it, hook up a Luxman C-1000F Preamp to a pair of Bel Canto Reference 1000M monoblocks, with a Luxman D-08 SACD player, and the new Sony SS-AR1 speakers. This combination due to its design science, will take you to the gates of Audio Heaven regardless of price, providing you all the best dynamics, detail and smoothness and richness one could ever hope for.