US magazin Tape Op, well known for its profound reviews, published a substantial test of the CC1. Two authors, Garrett Haines and Bob Katz independently performed extensive tests, including a blind listening test with 80 trials. They concluded: “We should regard this listening test as very indicative that the Grimm clock makes the 192 I/Oread more >
Dutch hifi magazine Music Emotion featured a review of the CC1 by Jan de Jeu. On a test where the CC1 reclocks the spdif line of his CD transport he writes: “… A beautiful stereo image. Normally I never play this disc until the end but this time I keep listening breathlessly. Amazed by theread more >
External clocking improves the sound of gear. Sometimes. Sometimes nothing happens, and in some cases the result is downright disappointing. What are the factors involved? This tech note discusses the PLL and clock basics: why does jitter matter? And how can your converter’s sound quality improve when slaving it to an external clock?read more >
A CC1 has been used in a massive digital PA system in Gelredome stadium, Arnhem, The Netherlands. It served as sync master for a concert of Lionel Richie with the ‘Symfonica in Rosso’ orchestra of Guido Dieteren. On all 5 concerts the stadium was sold out with 30.000 people… Read about CC1 >read more >
British magazine Hi-fi World raved about the CC1 in their review for the May issue and granted it the maximum amount of 5 Globes, which is ‘Outstanding’. Reviewer Tony Bolton used the CC1 as word clock source for a Marantz SA-7 and experienced improvements in texture, focus, definition and stereo image. He enjoyed beautiful resonanceread more >
In this white paper Grimm Audio co-founder Bruno Putzeys offers deep insight in the requirements for PLL’s in audio devices and their impact on jitter. A PLL synchronizes the internal clock of a digital audio device with the outside world so it can receive and process digital audio signals. Understanding how various audio devices respondread more >
Dutch mastering engineer Sander van der Heide posted an enthusiastic report about the CC1 in his blog. The crew of the hip-hop act ‘Bl3nder’ he was working for was impressed by the improvement the CC1 offered to their sound and were equally intrigued by our ‘dotted i’ power led.. Read about CC1 > Bas vanread more >
Grimm Audio’s co-founder Peter van Willenswaard is considered to be the first audio journalist to write about the impact of jitter on sound quality in the international audio press. His article in the November 1988 issue of Stereophile is therefore of great historic importance and we are proud to share it here with you. Itread more >
The editorial team of the German Studio Magazin did two large articles on word clocks and were impressed by the CC1 and our support. From part 1 (August 2008): “The Grimm CC1 offers a beautiful and precise sound, a pleasure to listen to.” From part 2 (September 2008): “The jitter measurement results of the CC1read more >
When aiming for the highest possible performance, testing becomes a problem in itself. Even the best available test gear will only approach the performance of the device under test. In addition, commercially available test equipment is designed to work in a very wide range of situations and compromises must be necessarily made. To get aroundread more >
DSD, short for “Direct Stream Digital”, is the name that was given to ‘PCM audio with just one bit’, as Peter Eastty of Sony Oxford once put it. The format is native to some AD and DA converters, such as the Grimm Audio AD1. The one bit signal has some unconventional features that lead toread more >
