VIVA Linea Preamplifier

Not much to say here. If you know it, you know it's arguably the best tube line stage preamplifier on earth.  (and the best line stage preamp, period).  Only bettered by the new Nagra HD.    (And note when browsing. This is the new model with revised improved quieter tube power supply)
From their website:

A preamplifier is the center of an audio system. Linea represents our quest for excellence in selecting and delivering signal from the source to the power amplifiers, while providing for volume level control. It offers musical enjoyment through refined dynamics and low distortion. Linea is unique due to its extremely short signal path with only one active stage maintained in the simplest topology. It is complemented with carefully selected parts and a state-of-the-art output transformer.
Linea has a robust external power supply for delivering unconstrained sound dynamics and impact. At both micro- and macro-levels, dynamic shadings and headroom seem limitless. The deep, tight, accurate bass is complemented by the transparent and liquid mid-range with the sense of openness and lack of compression in the upper frequencies.

To address the need for separate subwoofers or auxiliary components, a secondary output with a preset level is provided. Linea also offers buffered output with the level control, ready for bi-amplification. The chassis is made of solid aluminum for best magnetic neutrality and resonance control.
Details:

Unit:
Dimensions w×h×d:
410×185×410 mm

Weight: 14 kg

Tube Complement:
2×6C45P; 2×6N1Pi;
2×2A3

PSU:
Dimensions w×h×d:
410×210×410 mm

Weight: 15 kg

Tube Complement:
2×2A3

Stereo line preamplifier

Triode tubes

One Active Stage for shortest path

Zero feedback single-ended

Class A circuit featuring low noise and incredible transient response

Extremely high quality output transformer, built with special materials

Real point-to-point wiring

Buffered second output with level control, ready for bi-amplification

Four RCA Line Inputs, one RCA direct Input, one XLR Input

Unbalanced and balanced outputs

Output Impedance 130 Ohms allows for long output cables

External 2A3 based power supply

Optional remote volume control

Non-magnetic aluminum chassis