Welcome to my place!

Audio Resource Jan Didden

It's great to have you here!

This place is where I talk about my personal projects, interests and whatnot. Not necessarily related to audio, although it often is. Under the Musings button you'll find things related to perception and conciousness which of course are very much applicable to audio!

My library lists lots of (historic) audio papers and studies that I personally find important to understand many different issues in audio.

I also have collected the interviews I've done with audio luminaries. Take some time to read and digest them - there are very interesting and worthwhile gems in each of them! My projects however is audio stuff - things I designed, wrote articles about, and my personal system. Comments and remarks are always welcome!

Last but surely not least, let me mention my publication Linear Audio. Published twice per year, over 200 pages of technical audio related articles from international authors. Article abstracts and author bio's can be read at the website, and some articles are available for free online.

So, take a look around, explore the various areas and let me know what you think!



Question: What are the distortion and noise specs for this unit?

All specifications are available in the Spec Sheet which can be found at the Autoranger page.

Question: Autoranger BOM and parts questions

Over the course of people building autorangers, they may find alternatives for some of the parts. If I learn about that I will update the BOM and show the alternative.


1. The attenuator board layout shows an SMD 'C13' at the middle front. This capacitor is not needed. .

2. There are several spots for compensation capacitors that only apply to specific opamps used. For instance, C17 is meant for use with an NE5534 in the U3 position; C2 would be used with an AD797 here. See also the Assembly Guide.

Question: Does the Autoranger need calibration, and what equipment would I need for that?

The first version of the autoranger needed calibration for frequency response flatness, but the current MK II does not require that anymore. It does need an adjustment for maximum Common Mode supression, which is described in the Assembly Guide.

You'd need an AC mV meter to adjust a trimmer for minimum indication.