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SW1X Pre II Line & Phono Pre-Amplifier Volume Control Valve Amplification

SW1X Audio Design™ PRE II

Performance Level 2
Line & Phono Pre-Amplifier

 

The PRE II is a pure class A, Output Transfomerless (OTL) line pre-amplifier with Power Valve Output Stage. Employing 6V6 power tubes at the output makes the PRE II a smaller brother to the SW1X PRE IV pre-amplifier. It is great enhancement to any tube power amplifier and ideal partner to our DAC I, II and III STD/SPX and LPU I & II Phono products, reducing their output impedance further and enhancing their sound with fullness and authority. With a help of of a PRE II, any source becomes unleashed to drive subsequent power amplifiers to its full potential.

Available with a supercharged LPU Phono stage denoted as PRE II LPX and can be ordered with differnt series of SW1X Stepped Attenutator Volume Contols.

SW1X Pre II Line & Phono Pre-Amplifier Volume Control Valve Amplification

SW1X Audio Design™ PRE II Line Pre-amplifier Features:

  • Harmonically matched Component & Material Quality
  • Output Transfomerless (OTL) 6V6GT Power Valve Output Stage
  • 1 x Double triode 6SN7 driver, 2 x 6V6GT Triode Connected Power Valve Amplification Design
  • Hybrid Point 2 Point Hardwiring Technique for the most consistent production results
  • 5Y3 Directly heated Tube rectified CLC (choke filtered) B+ power supply
  • For maximum transparency & dynamics, the circuit is hard wired with of a specially selected conductors (single strand or Litz)
  • Internally wired exclusively with our SW1X Magnum, Genesis and Opus conductors
  • 1 x SW1X Audio Design™ Stereo, 24 Way, discrete resistor Stepped Attenuator (SPX Version)

 

Tube Compliment:  2 x 6V6GT, 1 x 6SN7, 1 x 5Y3

Reviews

PRE II LPX  Line Pre-Amplifier

PRE II LPX  Line & Phono Pre-Amplifier

 

Note: Due to SW1X Audio Design’s ongoing research and development process, specifications are subject to change without notice.

The Power of Valve Amplification

SW1X Pre II Line & Phono Pre-Amplifier Volume Control Valve Amplification

 

SW1X Audio products were designed for maximum performance and also to ensure compatibility with majority of audio systems. However, pairing different audio systems may result in impedence or sensitivity mismatch. For maximum musical pleasure, we recommend to pair our products only with our harmonically matched system components. To achieve best possible results, the matching system component should be on equal performance level or alternatively within one level below or above.

 

Specifications

Dimensions: Height (mm) 150 x Width (mm) 330 x Depth (mm) 400

Weight (kg): 10 (with LPX Phono, 12kg)

Max Power Consumption (W): 110

Output Noise, Unweighted (mVrms): < 0.5

Output Impedance (Ohms): 10

 

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