Audio over voltage protection

The two normal diodes are not needed. Just put two zener in series. One upside and one upside down and take an eye on the frequency response

Alright hurz will do! I'm not going to change this one but the comment will help others.

I think he meant like that http://everycircuit.com/circuit/5270032561209344 and this is hard clipping, I wouldn't recommend it for audio, it's the same as the hard clipping transistors give you, which is very unpleasant.

I recommend soft clipping like this http://everycircuit.com/circuit/5546037897068544 unless you specifically want hard clipping, but other than electric guitar distortion I wouldn't recommend this method of compression for audio. It introduces a lot of odd harmonics, which are unpleasant to the ear. The soft clipping method is more like vacuum tube distortion, where the amplification is not cut off abruptly near the cut off points, but continues at a decreased rate. The result is a smoother clipping, and less odd order harmonics. This is one of the reasons audiophile swear allegiance to tubes, basically their distortion mechanism is not as unpleasant as the transistor's.

Buggzy, read the headline again "Audio over voltage protection"

He probably meant audio overvoltage protection, which is basically voltage limiting e.g. clipping.

And soft clipping is probably not was he is looking for, cuz it does introduce distortion already at low levels. While hard clipping can give more dynamic till it start being ugly.

Before I forget it, you PROBABLY meant kHz and not Khz

Hurz is right, the reason I tested this was for my headphone output for a eurorack case I'm building. So if it goes too high my headphones will bust. Hardclipping is the output stage white is after an attenuator.

Yeah but soft clipping sounds better. Less odd order distortion. He can use some sort of AGC if he wants somewhat less distortion, but end game is, there's no clipping technique that doesn't introduce distortion.

Hard clipping does not clipp while your soft clipping does clipp always!!!!!!!!!!!!!!! Have fun with your audiophil warm sound

Hurz, it's for a eurorack circuit. I don't want to over volt stuff, and distortion is fine as its a synth and I don't mind the extra harmonics

I know, tell it buggzy