I tried my friend's W4S STP-SE Preamp and SX-500 mono blocks combo in my system and was amazed (they replaced a Cullen Stage IV PS Audio Trio C-100). The STP-SE is a very transparent preamp with a hint of tube like color. Their W4S amps are amazing all around. I ended up buying a W4S DAC-2 and a pair of the new W4S mAMP monoblocks. I run the DAC direct to the monoblocks and I am now in musical heaven.
Wyred 4 Sound STP SE and ST-1000
Their slogan of "Rediscovering your music" is no spin. This Preamp and Amp combo are giant killers for the price. They provide exactly what your source component provides, which is all any music lover could ask. The company's component break-in time is totally accurate. Only after 300 hours will you experience what these components are capable of. I matched these with Ty Lashbrook's Linbrook Signature Monitors and two of his Subwoofers and it was a match made in musical heaven. It is not a solid state sound or tube sound, but rather a master tape sound. What more could you ask for. I'm done shoppin'!