This is a story about the first phono preamp of Grimm Audio, the PW1. I have designed quite a few phono preamps in my time, between 10 and 20 I guess, and using all types of technology: transistors, fets and tubes. I also analyzed and modified three or four times that number of commercial phonosread more >
Eelco Grimm has always had a fascination for how the human brain works, both from a psychological and a philosophical point of view. A scientific paper that showed how music reduces cognitive dissonance inspired him to write a deep essay on human consciousness. The writing took a few years and it’s become a text full of mental vistas. A long read to cherish.read more >
#1 Cannot log into Roon after database reset. After you performed a database reset you cannot login to Roon. Instead you are forwarded to the Roon login page. After returning to the Roon remote there is no response. To resolve this issue, please update your MU2 to firmware version V0.9.6 or higher. #2 Playback soundsread more >
Recently we shipped the first batch of MU2’s. We are very happy to see that the first customer reviews confirm our own enthusiasm, like this one on Audiophile Style: “(…) I’m most impressed by the total naturalness of that space and the coherent way everything has its position in that space. How the tiny soundsread more >
In this article we present some backgrounds of the design principles of the Grimm Audio ‘Major DAC’ digital to analog converter in our MU2 music streamer. Converting a digital signal into analog has always been a major challenge, which is clearly demonstrated by the abundance of DA conversion concepts that have seen the light over theread more >
For many years, one of Eelco Grimm’s main focus points has been to fight loudness wars. His goal is artistic freedom for all music and film producers, and the loudness wars strongly limit their artistic possibilities. Eelco’s contribution to the new AES recommendation td1008 for Loudness of Internet Audio Streaming and On-Demand Distribution is probablyread more >
On the occasion of the SB1 introduction, we asked its designer Rob Munnig Schmidt to write a comprehensive tech note about motional feedback. Rob’s series of white papers about loudspeaker technology has become a classic. But it requires a trained mind to fully grasp all ins and outs. In this new tech note, Rob presentsread more >
Our MU1 Music Player is receiving critical acclaim for its sound quality. Many people ask us how a unit with just digital inputs and outputs can improve the sound quality so much, so we decided to write this explainer text. At the core of the MU1 a so called ‘FPGA’ processor is found. This isread more >
Thursday October 17th 2019, at the 147th AES Convention in New York, Eelco Grimm will present his AES paper 10268 “Analyzing Loudness Aspects of 4.2 million Music Albums in Search of an Optimal Loudness Target for Music Streaming”. The research for this paper was performed in 2017 for HKU University of the Arts Utrecht (whereread more >
Cable assemblies are available in many different types. One can easily get lost in the woods, especially when interfacing unbalanced and balanced equipment, or using sub-D connectors for analog or digital audio. As a service to our cable assembly customers, we wrote an extensive document that shows the standard pinouts and wirings of the variousread more >
