Leben RS-28CX Tube Preamplifier

The Leben RS-28CX Tube Preamplifier boasts exceptional quality, particularly with its impressive phono stage. In our experience, it is one of the most exceptional pre amplifiers on the market. Complete the ultimate valve setup by pairing it with the Leben CS-1000p power amplifier.

RS-28CX is equipped with the CR type equalizer based on GE(General Electric/USA) 12AT7 authorized by J.A.N.(Joint Army & Navy) standard of US Army, and can reproduce a very high quality and clear sound without adding any NFB.

To avoid compromising on sound quality ,one of the solutions we adapted to totally protect the sensitive CR type equalizer from negative effects was to develop a separate power supply unit.

Likewise, some of the finest available high-end audio components were selected for the RS28C to keep the deflection of the RIAA curve below +/-0.3%.

Of course, the phono equalizer is only one of the strengths of the RS28C. Another notable feature is a very strong output voltage created by the Dual-Triode Tube 6CG7 of General Electric(USA) used for the line stage. Leben further selected the best quality tubes out of these and constructed a powerful SRPP type amplification which can supply power amplifiers with a maximum 80V of clean output signal.
In considering the fact that output voltage of a standard preamplifier is more or less 40V, the RS28C can output about two times as much voltage, which will drive power amplifiers with very low input sensitivity.

Likewise, for using the RS28C with a high sensitivity power amplifier, a 5-step attenuator is present in order to eliminate residual noise from speakers.

Leben also included two outputs (one fixed and one variable) in order to cope with requirements for adding a Sub-Woofer.

Features 

• The Phono equalizer Circuit of CS-30EQ is of CR type RIAA equalization design with zero feedback in order to bring out the superior characteristic of the 12AT7 which is authorized by J.A.N.(Joint Army & Navy) standard.
• The line stage circuit uses the Twin-Triode Tube 6CG7 of General Electric(USA) SRPP system, and can supply a signal of up to 80V to the Power Amplifier. Therefore, RS-28CX can drive all kinds of Power Amplifiers of Low-Sensitivity or Low-Driving capability.
• The highest quality available components(Condensors, Resisters, etc) are used for all essential parts which affect the sound quality. a high grade Detachable AC power cord is included.
• In order to shut-off any influences from the power transformer to the main circuit,the Power Supply Unit is housed in a seperate chassis.
• Muting 30 minutes after Power-On.
• Natural wood Side Panels.
• Made in Japan

Specifications