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The Proto DI is a no frills, studio quality passive direct box that can be used with active and passive instruments. With it's low profile, light weight, and one-sided jack placement, this DI can fit in tight spaces, and makes pedalboard wiring a breeze. The custom UK made Carnhill transformer rivals the best in the business, handling line level signals and beyond with extremely low distortion and a flat EQ response from 20 Hz to 20k Hz. Sometimes all you need is a passive direct box that will always be transparent and dependable, and the Proto DI fits that need without breaking the bank.



  • Passive transformer direct box; requires no power
  • Input and Thru jacks wired in parallel for pass-through operation
  • 20Hz to 20kHz with less than 0.3 dB variation
  • +21.5dBu max signal with less than 1% distortion at 20Hz
  • THD less than 0.1% at 20Hz at +4dBu
  • Input impedance: 140kΩ
  • Blocks DC on the input; Balanced out blocks phantom power
  • All metal Neutrik jacks
  • Ground lift button connects or disconnects pin 1 from ground
  • Saves 1 pound of weight compared to steel direct boxes
  • Dimensions: 4.77" long x 2.87" wide x 1.57" tall
  • 0.55 lbs (250 grams)
  • Striking anodized transparent red finish with black print

Proto DI

Out of Stock
  • We ship internationally. All orders will be shipped via Canada Post. Your shipping cost will appear at check-out.

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