Union Tube & Transistor

Union Tube & Transistor is based in East Vancouver, BC Canada. 

We strive for best practices in our building of musical equipment, pursuing ease of use in durable, repairable products.

Our pursuit of great tone is its own reward.







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The GBX-95 is a resurrection of the Systematic Sound guitar splitter.

A transparent low-noise audio chain is attained with:

  • custom studio-grade OP transformers
  • no coupling capacitors in signal path
  • 1% metal film resistors and high-quality components
  • low-noise amplifier, high-speed, precision design, with a high-current OP for driving multiple capacitive loads
  • custom toroidal power transformer for zero hum
  • linear, non-switching power supply, so no ultrasonic noise on the OP


  • 1 in, 6 out
  • on-off and phase switch for each OP channel
  • IP mute switch
  • unity gain
  • IP impedance: 1MΩ
  • OP impedance: 100Ω
  • noise figure Rs=10KΩ: 1.3dB
  • noise figure Rs=5KΩ: 1.9dB


  • can drive up to six amps with no loading of the guitar and no ground hum
  • can drive long cables with no treble loss

Application/Studio use:

  • quickly audition amps to see what sounds good
  • layering of sounds with multiple amps


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