Sans Amp troubleshooting

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Robin28
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Post by Robin28 »

Hi everyone,
I tried to make a Sans amp Bass driver, with some mods.
I added a parametric eq with the shematic of a JHS Haunting mids, and i added a Max1088 to run it on 18v from a 9V power supply.

Everything is working perfectly BUT! i get a lot of distortion form the parametric EQ. (If i bypass it removing c19 and c36 and replacing it wirh a wire, the distortion goes away.)

(i have to say that a long time ago i tried to built a haunting mid and i had the same issue. I thought it was a headroom issue, but no.)

I have VC around 16V
VR 7.8
and the eq other than the distorted sound works well.

Any idea? :)

(I linked a sound exemple
The shematic of the haunting mids
And my schematic )
Attachments
Maleficent Mids.pdf
(667.66 KiB) Downloaded 65 times
terfgergerger.wav
(5.43 MiB) Downloaded 56 times
InkedSchematic_Sans Amp BD_2022-01-20_LI.jpg

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