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Stereo Pre-Amp



  • Description
  • Features
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Looking for an elite pre-amp designed for the most critical listener? Look no further than our STP-SE. The ‘SE’ stands for special edition and as our customers and reviewers will tell you, this piece of equipment is special, indeed.

The STP-SE’s stellar performance and upgrades begin with its wires: Kimber Kable’s patented TCSS wiring, a highly passive multi-gauge, multi-strand, continuous strand pure copper that allows for greater dielectric movement than most other wires in its class. Add to that four oversized power-supply capacitors replaced with our trademark Low ESR "Super Cap,” an extremely low noise floor (<6µV Passive, <18µV active) and a fully balanced circuit and the results are spectacular 3-D imaging and instrument placement.

A 25A Schottky bridge rectifier connected through 164,560+µF of capacitance via our proprietary TRR (Triple-Ripple-Reduction) power supply circuit ensures exceptionally clean power delivery to optimize audio quality. Standard operation in a passive state and gain to boost the signal only when needed brings you the utmost fidelity. The STP-SE’s resistor ladder volume control, built with our discrete proprietary design, guarantees the STP-SE’s volume control is clean, accurate, and transparent.


  • Input / Output wiring upgraded to Kimber Tcss wire
  • 2nd stage filtering caps (4-22,000uf caps) are upgraded to the Wyred 4 Sound Low ESR "SUPER CAP" designed for power supplies 
  • Vacuum Fluorescent Display (VFD)
  • Optical rotary encoder (volume knob)
  • Fully functional remote control
  • 12V DC Trigger input (to automatically activate HT Bypass mode)
  • Two - 12V DC Trigger outputs
  • Home Theater bypass (customizable for any input, also DC Trigger input selected)
  • Balance control
  • Absolute phase control (0°/180°)
  • Efficient (no heat)
  • Tripple-ripple reduction circuit contains 164,560uF of capacitance
  • Extremely low noise floor
  • Fully balanced input to output
  • Buffered passive/active design 
  • Automatically switched in Line Stage (when more volume is needed)
  • Discrete volume control using dale RN55d resistors
  • Unbalanced to Balanced conversion (when RCA input selected and XLR outputs are being used)
  • Idle power consumption = 15w
  • Rugged construction
  • ½” Machined and Anodized front panels
  • 60kΩ input impedance
  • 3 sets of gold plated unbalanced (RCA) inputs
  • 2 sets of gold plated unbalanced (RCA) outputs
  • 2 sets of Neutrik Balanced (XLR) inputs
  • 2 sets of Neutrik Balanced (XLR) outputs
  • Factory Selectable mains 115/230VAC
  • Compact size (17”W x 4”H x 13”D)
  • 22 lbs.
  • Covered by a 5 YEAR WARRANTY ( original purchaser)


  • Typical THD+N 20Hz-20kHz (A Wt) @ 2V: <0.003%​
  • Noise (A Wt / Vol ≤ 63): < 6µV
  • Noise (A Wt / Vol ≥ 64): < 18µV
  • Noise 20Hz-20kHz (Vol ≤ 63): < 9µV
  • Noise 20Hz-20kHz (Vol ≥ 64): < 27µV
  • Frequency Response 20Hz-20kHz: ± 0.020db
  • Channel Tracking (All Steps): < ± 0.050db
  • IMD: < 0.002%
  • Crosstalk 20Hz-20kHz (Vol ≤ 63): > 106db
  • Crosstalk 20Hz-20kHz (Vol ≥ 64): > 96µV
  • Output Impedance (Vol ≤ 63): 113Ω
  • Output Impedance (Vol ≥ 64): 78Ω
  • Input Impedance: 60.4kΩ
  • Maximum Output Voltage: 9V RMS


The Stage 2 version of our lauded Wyred 4 Sound STP-SE pre-amplifier takes this "reference caliber" preamplifier to the ultimate level.... And earns it a Blue Moon Award.


Read the Six review here -      

Two-Channel Needs Your Help!

The absolutely transparent presentation was not sterile or tame as some passives are afflicted, Instead, the STP-SE allowed the color of the performance to be heard vividly without adding any tone of its own.
Jeff Brown
— Affodable$$Audio

Wyred 4 Sound STP

EJ Sarmento's solution is the perfect hybrid of an attenuation transformer passive and high-bandwidth low-noise valve preamp.
Srajan Ebaen
— 6moons