FAIL in hardware design | Why I can't measure impedances with it! | Behringer UCA202

At the end of 2020, I recommended the Behringer UCA202 sound card as the centerpiece of a loudspeaker measurement system. Unfortunately, I received complaints afterward that this sound card was causing problems for some people. In this video, we get to the bottom of the problem and identify the source of the error. ---SUPPORT This video helped you and you want to show your appreciation? Or do you simply want to show appreciation for the work that went into it? With preparation and follow-up, a video can easily take up to five hours to create. I would be very happy if you could send me a small donation via PayPal. You can easily do this for me using the following link: https://www.paypal.com/paypalme/frank... Thank you very much. ---- Do you want to set up or upgrade your measurement lab or woodworking shop, or buy materials for your own projects? I've provided a few links here. These are affiliate links. I would be happy if you would order the respective products through them. Simply follow the links to the product page. The price remains the same for you. -- ELECTRONICS: The Plate AMP with DSP from Arylic https://www.arylic.com/collections/di... The 2.1 AMP from my soundbar https://www.arylic.com/collections/di... My digital crossover DCX2496: https://amzn.to/3qEtkha? -- MEASUREMENT LABORATORY: The Monacor MPA-102 preamplifier for the measurement microphone: Link 1: https://amzn.to/3slMrj4 Link 2: https://amzn.to/3GVmcEt The SONARWORKS XREF20 measurement microphone itself: Link 1: https://amzn.to/3sbww79 Link 2: https://amzn.to/32auUzF The PeakTech 8010 sound level calibrator: https://amzn.to/3slMTxM The clay for the TSP measurement, which my viewer Klaus sent me, can be found here (unfortunately only 10m rolls): https://amzn.to/39I0TrW -- REFERENCES: The basics of "loudspeaker engineering" are explained in the Loudspeaker Engineering Handbook. It also contains tables for quick reference of component values. https://amzn.to/3sIhTGg? Another book comes from Klang&Ton (Brieden Verlag) and also covers the basics. This one goes into the subject a little more deeply. https://amzn.to/3qA7Wsl? -- WOODWORKSHOP The great jigsaw blades that cut without tearing are apparently only available in sets of 18. Here's the link https://amzn.to/2Z4ENtS In the woodwork, I can't manage without a biscuit joiner. I use the inexpensive solution from Einhell https://amzn.to/3mrdIKG? A pile of 20 mm biscuit dowels comes in a practical case. You can never have enough of them. https://amzn.to/37rux3D? Not exactly cheap, but worth the price is the GCM 8 SJL miter saw from Bosch. I cut all the wood for smaller boxes on this saw. I'm not giving it away anymore. https://amzn.to/3msHiPU? For precise cuts, you need to adjust the saw angle. Unlike other products, this LevelBox has a real battery built in (AAA instead of CR2032) and doesn't require a new battery as often. A tool I wouldn't want to be without. https://amzn.to/2J143Nc? You can find the great textured paint for refining your cabinets at the following links. WARNEX black: https://amzn.to/2NVVNAt WARNEX gray: https://amzn.to/3e8Kkbp WARNEX white: https://amzn.to/2PjGzFF Thank you if you order through them. The links were created to the best of my knowledge and belief. --- GENERAL INFORMATION This is a display of my development work and technical information without any warranty or guarantee. This is just an example of how it could be built. Any construction or reconstruction is at your own risk. This applies to compliance with technical specifications, operational safety, and the success and sound of the reconstruction. Any liability for damages is excluded. The channel is specifically designed so that interested viewers can learn the basics to get involved THEMSELVES. I run the channel as a side job as a hobby. For this reason, please understand if I am unable to provide additional advice or development. Due to time constraints, I have to decline such requests. Especially in the last few weeks, the number of "help" emails has increased significantly. Don't be angry if you don't get a response. I can't keep up. For all other cases, please see my email address below. Contact info: [email protected]