Sans Amp Bass Driver

[ξεναγος νεκροπολης]

i don't know sveinms...everything looks ok on this side of your board. but your voltages look a bit off.i would expect those to be closer to 4,5V. you could use an audio prob. and by following the schematic, you could find where your signal dies. audio prob is really useful in debugging...

[sveinms]

Could you color the audio path on the schematic that I have to follow? I'm really bad at reading schematics.
After checking once more I found out that I forgot 1  jumper, but still no sound

[homoludens]

Hello, I'm joining the board.
I'm interested in building thing as well, so thanks for the layout.
From what i can say, red highlighted cap should be 2n2.
Also, in mine unit I will insert fx loop right after the switch and perhaps try to add switches that would eliminate some tone shaping. Persumably, disconnecting blue caps from ground would eliminate low pass filtering, which is totally unnecessary when playing through bass cab. Also disconnecting 6.2k resistor (green) from ground should eliminate notch filter. Or maybe it would be cool to replace that resistor with a pot, which will work as a mid control.

[Fight]

Any news here about the layout from Savvas? Did sveinms manage his build to come alive?

[sveinms]

No luck yet! The left side of the circuit has sound, the right side is silent.

[sveinms]

Ok, I had a bad tl072! with sw1&2 connected directly (switch was also broken) I have sound! Buth the controlls don't do anything! Only sound i'm getting is a distorted sound with a nice blend. I like the sound as it is, but it's stupid with 6 controlls doing nothing!  Any ideas?

[homoludens]

Whatkind of pots are you using? One of the schematics marked all pots as b100k (linear). At least blend definately should be linear. Volume-related things -- questionable.

[sveinms]

100k log for volume. controlls should still do something even if they are wrong...

[homoludens]

Check if you missed any cut.