Headphone belt-pack / amp with built in limiter? Do-able?

[therealfindo]

I guess this is not strictly a Stompbox question.. so sorry if this is the wrong place...

I was thinking about a belt pack for my In-Ear-Monitors, which I use with a cable to an Aviom mixer, with some kind of limiter to protect my ears from unexpected loud noises.. anyone got any ideas of how I might do this?

Cheers. 

[Mark Hammer]

It likely do-able, but I suspect it can be done better at the transmitter end than at the receiver end.

[tombaker]

It likely do-able, but I suspect it can be done better at the transmitter end than at the receiver end.

+1 on this.

[therealfindo]

It likely do-able, but I suspect it can be done better at the transmitter end than at the receiver end.

I'm not using a transmitter or reciever - I'm coming cabled out of the personal mixer. In any case I need to make some kind of belt pack, because the cable on the IEMs only reaches a little past my waist..

[mistahead]

The 'phones are a WIRED receiver.

The device pushing signal to them is the transmitter.

Adjust the signal at the output of the mixer, not on your hip.

[therealfindo]

The 'phones are a WIRED receiver.

The device pushing signal to them is the transmitter.

Adjust the signal at the output of the mixer, not on your hip.

Sorry, I assumed you were talking about wireless..

The issue isn't the normal output - yes, I set that on the mixer. I'm just wondering about a built in limiter to stop unexpected loud noises - such as happened in a rehearsal recently, despite the mixer being set at a comfortable level. The question is what a limiter circuit would look like. (You don't have to think it necessary )

[GibsonGM]

At its most simple, it would look like a clipping circuit found in our distortion pedals.  That is where diode clipping came from )   Diodes to ground, often biased so you can adjust the threshold of clipping.   

Found this in 10 seconds - not very fancy, but it's the basis of all this stuff.   Some good info in there, actually. Enjoy! 

http://www.261.gr/limiters.html

[therealfindo]

At its most simple, it would look like a clipping circuit found in our distortion pedals.  That is where diode clipping came from )   Diodes to ground, often biased so you can adjust the threshold of clipping.   

Found this in 10 seconds - not very fancy, but it's the basis of all this stuff.   Some good info in there, actually. Enjoy! 

http://www.261.gr/limiters.html

Thanks!

[Mark Hammer]

At its most simple, it would look like a clipping circuit found in our distortion pedals.  That is where diode clipping came from )   Diodes to ground, often biased so you can adjust the threshold of clipping.   

Found this in 10 seconds - not very fancy, but it's the basis of all this stuff.   Some good info in there, actually. Enjoy! 

http://www.261.gr/limiters.html

Nice little chunk of info there.  Thanks.  It's not at all something I'd recommend for the hypothesized belt-pack, but still useful info for other circumstances and nicely illustrated.

[mistahead]

Not bad idea there... if you're just trying to protect your hearing by removing peaks in the monitors hard clipping will do the trick.

You could easily put some anti-parallel diodes in between a male and female headphone jack pair, just measure the threshold you want to cap manually (ie turn it up with a meter watching) and pick the diodes for +/- that threshold (the audio signal is AC), I'm not seeing how much you gain in this use by adding a resistor/soft clippers too but I could be missing the point.

With my usual ghetto style I can imagine knocking up a dodgy over-simple limiter with two diodes, the above mentioned jacks and about a foot of duct tape, have ten of them in the guitar case and screw polish / L.T. reliability.

[tubegeek]

Nice little chunk of info there.  Thanks.  It's not at all something I'd recommend for the hypothesized belt-pack, but still useful info for other circumstances and nicely illustrated.

With references, yet! Holy Cow!