Leben RS100U, about 5 years old, in a perfect shape, no issues of any kind. Cosmetically 9.9/10, operation 10/10. NOS tubes included: 2 x 12AU7 RCA Cleartop, 6X5GT RCA, 6X5GT Mullard (spare tube). About 500-600 hours on tubes. Preamp was packed very carefully into two original boxes and ready for shipment.
PayPal fee and UPS Ground included in my price.
Sale due to Burmester 909 amp and Burmester 077 preamp upgrade.
Main advantage of preamp is 12AU7 tube, which cost $12-$60 and you can find about 20 different models to adjust the sound to your specific taste! Unlimited tube rolling! I used it in my solid state bi-amping system, Leben improved the sound significantly - more body, more liquid, smooth, detailed sound with enjoyable bass definition.
Oversized transformer. Direct input bypassing all selectors for pure signal. Great for bi-amping: two pairs of output RCA terminals (one fixed, one variable with potentiometer in the back). Both outputs are controlled by front volume knob, however you can adjust the level of output signal with potentiometer of variable output.
Sorry, no refund, no returns.
My 100% positive feedback on ebay and US Audio Mart : alitalik
“Very useful is the direct input that lets the signal bypassing the input selector and some other path of the circuit. A direct input terminal goes directly to the volume control to transmit a pure signal without passing via the contact points of the selector switch, therefore, a superior result is obtained when a source is used through the Direct Input.”
"The circuit design of the new Leben RS-100U line preamplifiers are similar to that found in the line section of the vinyl record oriented Leben RS-28CX Premium Preamplifier, but it has been optimized for use with digital as the intended primary source by altering the voltage supplied to the vacuum tubes, the choice of capacitors and resistors, and the power supply design."
"Parts quality of the RS-100 and R-100U is very high with German UXB resistors, German EAO MKP capacitors, Nichicon "Fine Gold" capacitors, ALPS volume and balance controls, and "Spiral Wire" for all inner wiring. The RS-100 and RS-100U use carbon film resistors that are custom-made for the RS-100, and were developed to give the most natural and life-like sound from digital sources. Leben describes the transformer in the power supply as being "two times larger than necessary to make the sound full-bodied".