This "OEP Line Transformer Box" was inspired by "Neve-kun." The only difference is that Neve-kun is a copy of the NEVE 1073's microphone input, while the OEP Line Transformer Box is a copy of the line input. NEVE 1073 Microphone Input Input impedance: 1.2kΩ or 300Ω Line Input Input impedance: 10kΩ Neve-kun Input impedance: 1kΩ OEP Line Transformer Box Input impedance: 10kΩ It works exceptionally well with digital amp simulators, transforming the cold digital sound into a hot analog sound. Connecting the OEP line transformer before and after an amp simulator results in surprisingly smooth high frequencies. Neve-kun, due to its construction, tends to thin out the sound, but this one allows you to purely enjoy the silky sound of Carnhill transformers. If you have an audio interface or mixer, you can experience the sound thinning of Neve-kun by replacing the guitar → amp simulator output with the microphone input (Neve-kun) and the line input (OEP Line Transformer). Question to AI: "What happens when you connect a guitar effects pedal to a microphone input?" "Low out, high in" Customer Reviews It was a truly wonderful product as the seller stated! I am very satisfied! From a multi-effects unit to the OEP transformer box → power amp, the sound became thick and pleasant to the ear. From a wireless receiver to the OEP transformer box → multi-effects unit IN, the thickness became moderately thick and the sound was pleasant to the ear. It softens harsh high frequencies, so I think it's perfect for digital equipment. What the above settings have in common is that the sound doesn't become harsh, and the sound becomes softer. However, the outline is clear, and you never lose track of what you're playing. By the way, I play in Drop B tuning. With Neve-kun, the sound was brittle, so I was wondering, but the OEP transformer box gave me the sound I was looking for. The seller's confidence was genuine.