SW1x LPU V Phono Pre-Amplifier

LPU V DHT Phono Pre-Amplifier

Let Your Vinyl Come Alive

LPU V is our top of the line 45 Directly Heated Triode power output tube based Phono Pre-Amplifier. LPU V offers the most alive, holographic and transparent presentation of music. It is part of our Performance Level 5 line up that represents a no-compromise & no-expense-spared design philosophy.

The input stage of the LPU V uses the EF37A, an octal variant of the renowned EF86. Both of these tubes were used in RTR tape recorders during the early 1960s and played a key role in producing some of the finest analogue recordings ever made. The interstage/driver is based on the musical and well known 6SN7 double triode. The output stage is now based on the 45 DHT power valves. LPU V is at the penultimate level of any phono stage, making it the most natural and organic sounding pre-amp for any turntable.

SW1X Audio Design™ LPU V  Phono Features:

• Specially Selected and Harmonically Matched Component & Material Quality
• MM Phono Pre-amplifier is suitable for all moving magnet (MM) or moving coil (MC) in combination with a matching SUT
• 3 Gain Stage Pentode Input-RIAA-Double Triode Interstage-Directly Heated Triode Output Stage Design
• Signal Output Transformer De-coupled, Zero NFB, Triode Valve Output Stage in Pure Class A, (inductive loading & de-coupling) Circuit Topology
• Split 2 Chassis Design for minimum Noise Floor
• SW1X Audio DesignCustom Designed Signal Output Transformers
• Based on 2 x EF37A Pentodes Input, 1 x 6SN7 Double Triode and 2 x 45 DH Triodes on Output
• Active Series-Resistor-less RIAA Equalization for maximum dynamics
• 5U4GB Valve Rectified C2LC2LRC (choke filtered) B+ Power Supply
• 47K Input Impedance & < 200 Ohm Output Impedance
• Total Gain is approx. 46-52 dB depending on the Choice of Valves
• Maximum Input Voltage: 300mV
• 3 x Mains Transformers & 6 Filtering Chokes

Seperate Power Supply Unit

LPU V Phono Pre-Amplifier is a unique 2-Chassis Design where the 2nd chassis is separate power supply, designed to eliminate EMI (electro-magnetic interference). The two Chassis are connected via premium quality SW1X Magnum & Twin Opus Cables