I decided to add a Pre OUT Power Amp IN loop to my Code 25.
Although I quite like the sounds of the Code 25 I found it extremely glassy and has too much biting high mids for me. So I wanted to add an EQ.
I find the inbuilt EQ pretty poor, and the fact that you have to save each eq setting in each preset, well I found that was a pain in the …
I just wanted a standard -on the fly- tone control I could adjust.
So if you want to do this mod I should firstly say:
DONT DO IT
The only odd thing, is that there are 2 x signal cables from the Preamp to the Power Amp in.
It is a 4 pin connector on the Pre and on the Power Amp.
It seems like it is a stereo feed from the Pre amp.
I guess that's just for the Aux in from a phone or similar, and it continues this signal on to the Power Amp board where it directs it to the stereo Headhone Jack.
But the Power amp it self is mono of course.
So if you just short the L,R together of the signal wires, then you get mono.
That works fine. You just miss out on stereo in the headphones – but that doesn't bother me.
Note the Code25 effects seem to be just mono.
So in the picture shown, you could cut into that signal wire and make the connections there,
OR I just unplugged both ends of the cable and soldered directly to the 2 boards. - Note, its tricky to do it this way unless you are an experienced solderer.
Wire it up as per the image and when you have no jacks plugged in it will work as normal and you will have stereo Aux in sound on the headphones.
And when you plug in the jacks and wire it through the effects loop then everything will be mono.
Everything worked fine on my modification and the level seems to suit a guitar EQ pedal nicely.
Remember as stated earlier – DONT DO THIS 😉
Although I quite like the sounds of the Code 25 I found it extremely glassy and has too much biting high mids for me. So I wanted to add an EQ.
I find the inbuilt EQ pretty poor, and the fact that you have to save each eq setting in each preset, well I found that was a pain in the …
I just wanted a standard -on the fly- tone control I could adjust.
So if you want to do this mod I should firstly say:
DONT DO IT
- It is dangerous with mains voltage in there.
- You could break the Amp.
- You will have no warranty as soon as you open the back case.
The only odd thing, is that there are 2 x signal cables from the Preamp to the Power Amp in.
It is a 4 pin connector on the Pre and on the Power Amp.
It seems like it is a stereo feed from the Pre amp.
I guess that's just for the Aux in from a phone or similar, and it continues this signal on to the Power Amp board where it directs it to the stereo Headhone Jack.
But the Power amp it self is mono of course.
So if you just short the L,R together of the signal wires, then you get mono.
That works fine. You just miss out on stereo in the headphones – but that doesn't bother me.
Note the Code25 effects seem to be just mono.
So in the picture shown, you could cut into that signal wire and make the connections there,
OR I just unplugged both ends of the cable and soldered directly to the 2 boards. - Note, its tricky to do it this way unless you are an experienced solderer.
Wire it up as per the image and when you have no jacks plugged in it will work as normal and you will have stereo Aux in sound on the headphones.
And when you plug in the jacks and wire it through the effects loop then everything will be mono.
Everything worked fine on my modification and the level seems to suit a guitar EQ pedal nicely.
Remember as stated earlier – DONT DO THIS 😉
