#1
My audio interface is Esi Maya 44. It has 4 line inputs (jacks, no XLR), or one of them can be configured to be a balanced mic preamp with phantom power. How do I connect a guitar to that interface?

I am good at DIY, I have built a few guitar effects, so I wonder if just a JFET buffer would be enough ?
#3
There are 2 problems with cheap DI boxes:
1. They can often sound cheap
2. They have an XLR output and my interface doesn`t have an XLR input. Also the only XLR - Jack cables I could find use a mono jack, so what`s the point of balancing the signal anyways then.
#4
I'd imagine you need to bring guitar signal to line level and that is usually done via DI box. In your case sounds like unbalanced xlt to 1/4 mono jack for coming out of the back of the DI box. I wouldn't worry about balanced for guitar.
#5
Quote by diabolical
I'd imagine you need to bring guitar signal to line level and that is usually done via DI box. In your case sounds like unbalanced xlt to 1/4 mono jack for coming out of the back of the DI box. I wouldn't worry about balanced for guitar.


Unless he´s using active pickups, those bastards will clip like crazy! the only way to solve that is a DI box
#6
Actually, guitar straight into the Line input with no gain is still well below the clipping treshold. I built myself a little jfet buffer, it brings some high end back, and I assume it matches the impedance quite good. This buffer has imput impedance of 500K, and output resistance of 133 Ohms. The audio interface`s Line input has an impedance of 10K which means the signal isn`t loaded and there is no loss of high end. Also it`s not adding any noise compared to guitar straight into Line in. I believe it`s better than a cheap DI-Box which would probably distort the signal because of cheap elements used to build it.

I haven`t tried plugging it into the mic pre with gain at 0dB. The mic input has an impedance of 3K ohms, maybe that will bring the noise a bit lower.
Last edited by ArturPr at Sep 14, 2016,
#8
The microphone preamp minimal gain is more than 0, and is sufficient to clip. With the buffer and line input it works fine. Now does anyone know of a fancy studio buffer design? :p