Tonemender problem

[Aryo rock]

So I build tonemender, but the volume is very low, almost can't hear the sound. I put tonemender after distortion pedal, crank up volume from pedal, I got very low volume. I use LM 833 opamp, I also put wired from the volume pot on tonmender.( bypass the volum pot),
Is something wrong here? Is tonemender will give me loud volume? or I need to build booster? thank you.

[GibsonGM]

Hi Aryo, welcome to the forum!   I am glad you built the Tonemender, it is a neat project.  Now to make it work right!        

It should have plenty of volume at the output, so something is wrong.  Go here and read this link, provide us with voltages please:  http://www.diystompboxes.com/smfforum/index.php?topic=29816.0

There is probably a small wiring error, which is very common.  Make sure you placed all your components in the correct places, first of all!  If you put a resistor in the wrong place, you may have a low output.   Same thing if you accidentally wire a pot wrong, or accidentally switch pots around.   So you  need to go over what you did many, many times, as a first step.

I recommend you build a simple Audio Probe, which will allow you to listen inside your circuits to see where a problem may begin.  http://diy-fever.com/misc/audio-probe/   This is a VERY useful little tool, and easy to make!

Please post those voltages so we can try to help.