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STI-500 Intergrated Amplifier

What are you waiting for? 

Rediscover your music, Just listen....


  • Description
  • Features
  • Specifications
  • Reviews
  • Downloads

Our STI-500 integrated amps are consistently lauded by critics as one of the best integrated amps on the market (including Positive Feedback’s 2010 Writer’s Choice Award). The STI features a reference quality analog pre-amp and two mono amps built into one chassis, creating exceptional performance in a convenient form factor. The STI’s RCA pre-out gives you the flexibility to bi-amp or add a subwoofer.

Because the unit is efficient and consumes very little power at idle, the STI is a truly green product that conserves all its energy for your music. On the outside, the STI’s Vacuum Fluorescent Display and optical rotary encoder not only look great, they ensure years of trouble-free listening. 


  • Vacuum Fluorescent Display (VFD)
  • Optical rotary encoder (volume knob / power button)
  • Fully functional remote control
  • 12V DC Trigger input (to automatically activate HT Bypass mode)
  • 12V DC Trigger output
  • Home Theater bypass (customizable for any input, also DC Trigger input selected)
  • Balance control
  • Absolute phase control (0°/180°)
  • Efficient (little heat)
  • Extremely low noise floor
  • True Resistive-Ladder volume control
  • Unbalanced to Balanced conversion (when RCA inputs are selected)
  • Extremely low Idle power consumption
  • Rugged construction
  • ½” Machined and Anodized front panels
  • 60kO input impedance
  • 4 sets of gold plated unbalanced (RCA) inputs
  • 1 set of gold plated unbalanced (RCA) outputs (For use with a powered sub, etc.)
  • 1 set of Neutrik Balanced (XLR) inputs
  • Factory Selectable mains 115/230VAC
  • Compact size (17”W x 4”H x 14.5”D)
  • Covered by a 5 YEAR WARRANTY (original purchaser
  • Typical THD+N 8O (10W out): 0.005%
  • Power Output 8O @ 0.2% THD+N: 250W
  • Power Output 8O @ 1.0% THD+N: 320W
  • Power Output 4O @ 0.2% THD+N: 550W
  • Power Output 4O @ 1.0% THD+N: 625W
  • IMD (CCIF): 0.0005%
  • Transient Inter modulation (TIM): 0.003%
  • Output Idle Noise: <80µV
  • Efficiency 4O: 80% @ 500W
  • Efficiency 8O: 77% @ 200W
  • Frequency Response 20Hz-20kHz: ± 0.3db
  • Lower Bandwidth: 3.3Hz (All Loads)
  • Dynamic Range: 115db
  • Gain: 0-39db
  • Sensitivity: 0.55V
  • Output Impedance: 0.005O
  • Output Impedance (Pre Out): 100O
  • Balanced Input Impedance: 60.4Ok
  • Unbalanced Input Impedance: 60.4Ok
  • Min Load: 2O
  • Dampening Factor (100Hz 8O): 2000
  • Max Output Current: 35A
  • Channel Tracking: < ± 0.050db
  • Crosstalk (20Hz-20kHz): >77db
  • Idle Power Consumption: 25w


Wyred 4 Sound STI-500 Integrated Amplifier

The STI-500 is very green, extremely good sounding, built to last, and very convenient.
Kent Johnson
— Positive Feedback Online

Wyred 4 Sound STI-500 Integrated Amplifier

In a well-tuned system it can provide a noise-free, detailed, dynamic, yet immediate musical performance that can only be equaled by amplifiers costing multiples of its price.
Frank Alles

— Stereo Times