Need help adding gain to Sadowsky Bass Preamp

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smackoj
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Post by smackoj »

Help needed gents. I built this version (see vero layout) and it's doing the job tone, eq wise but the gain seems to be suffering quite a bit. Could anyone make a suggestion how to add another gain stage before the output.....or maybe change a pot value etc to get a stronger signal at output? I am using it to control the bass and treble response on a subwoofer cabinet I have been restoring. I am using the sub to enhance tv viewing for my wife who is darn near deaf. So, it's a audio tv signal off the back of the monitor into the Sadowsky and then to the power amp running the sub driver. Without some form of Preamp the sub gets all the freqs and it doesn't do the job correctly.

Thanks guys (I know the schemo is needed here but I don't have one, I built just from the vero layout)
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sadowsky preamp.png

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Fender3D
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Post by Fender3D »

You'll need a line level circuit for your job there...
We'll need schematic to tell you whether it's just a matter of some different resistors or you really need other(s) stage(s).
Please do your homeworks and trace it down from the layout or ask the layout poster to give a link...

Otherwise I notice that this
Image
adding to Sadowsky really gives awesome results... but I guess your wife will disagree....

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smackoj
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Post by smackoj »

Sorry, I have not been able to find a schematic that is verified to be this version of the Sadowsky preamp. I will keep trying

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