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.
 
Features:
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