Four Channel Splitter Question

[moid]

Back to one of my earlier points:

The level problem on the line inputs may be due to loading not gain.

You really need to hear what a buffered guitar signal into one of those line inputs sounds like before you decide how much gain the booster needs to have. Can you breadboard one? Or use a non-true-bypass effects pedal?

Yes I tried a Boss pedal (GE7) turned off and turned on with all settings at 0, a buffer splitter pedal I built years ago and the AMZ buffer on breadboard. None of them did anything to improve the volume going into the 6i6 box.

[moid]

>> >Then they are not "line level". What are they?
> It says line input on the back of the box -

I was asking what the signal comes FROM.

Ah well, I didn't realise that

[GGBB]

All I can recommend is that you breadboard something simple using 9V with adjustable gain and see how it goes. Hopefully you'll be able to get the level up enough cleanly with just the 9V. If not, then consider maybe a voltage doubler chip to get to 18V or a different power supply to go higher. As I mentioned before, clean boost is going to be a function of the power supply, so you could design a clean boost that will run on anything from 9V to 50V, with the obvious limitation that lower supply means earlier clipping and lower max clean output level.

One thing to keep in mind is that your 6i6 instrument inputs are boosting your guitar to the right level, and it runs off 12VDC. Maybe it uses a voltage doubler, who knows. My point is that you should be able to do this with 12V if not 9V, and 9V should at least get you to 'close enough.' Forget about what the actual dB gain is and just try something.

[moid]

Thanks GGBB, I might well look for some voltage doublers then. I'll try it on breadboard first and see what happens. Pay day can't come fast enough!