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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/O sound better." This is a very important conclusion, since it is the first time in history that there is scientific indication that jitter frequencies below 200 Hz do influence sound quality.

HVT tests CC12010, February 3

The Netherlands' main Hifi magazine 'Hifi Video Test' features a four page article about the CC1 in their February issue. Author Marnix Bosman presents background information on jitter and puts the CC1 to test as master clock for an Esoteric SA-10. He finds "a larger improvement even than I expected. The sound actually gains quality in all aspects." Using the CC1 as digital interlink reclock unit he enjoys improvements ranging from 'interesting' to 'massive'.

New web site2010, February 1

Our former web site was designed around just one product, the AD1. It was getting a bit long in the tooth. The need for a web shop to facilitate sale of our software products felt like the perfect excuse to completely rebuild the site. At the same time we decided to join the social media trend and start making video tutorials and audio demo’s. Our online service will thus provide a much better service to our customers. We are very proud of the result, please send us a line at Facebook and tell us what you think.

For the second time the AES Netherlands section invited us to give a presentation about our design strategies. This time we decided to stage our brand new LS1 DSP corrected loudspeaker. Bruno talked about the fundamental issues one has to address when designing a loudspeaker of reference quality and afterwards the group of 60 attendents split into groups for listening sessions.

With DSP controlled speakers like the LS1 the quality of frequency response measurements is transferred almost directly into the speaker’s frequency curve. The quality of the measurement can therefore make or break the end result. We are very glad we could add a series of real anechoic chamber measurements to the quasi-anechoic measurements in our lab and garden. Many thanks to Utrecht School of Music Technology in Hilversum for that.

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 the difference I keep switching back and forth. (...) Both ends of the spectrum are beautifully expressed in the sound of the organ and brass instruments. The texture of the brass instruments is fabulous." 

The New York AES will stage the premiere of Grimm Audio's LS1 production unit! The last few months have seen important changes in the driver selection which takes the LS1 even one step further than the prototype. TPM is now shipping too. The CC1 can be heard in action in the AES Special Events Room. Mike Chafee, responsible for all sound reinforcement at the AES show, preferred the CC1 as "head of the class" after comparing it to other high end solutions. We are most happy to meet you at booth #539. 

We are very happy to announce that Dutch label Channel Classics has become one of our AD1 customers. Among the first recordings made using the AD1 is Mahler Symphony no.4 by Ivan Fischer and the Budapest Festival Orchestra. This is a SACD of breathtaking beauty, concerning performance as well as sound quality. It is a true demonstration of the goal of Grimm Audio: to fundamentally improve on current recording and playback quality. 

Together with our German distributor Audio Import, Grimm Audio exhibits at the Hi-End Gear show in Hamburg. We will demonstrate our LS1 loudspeaker in the exhibition’s exclusive listening room. The relaxed atmosphere of this small but great show will certainly lead to very nice listening sessions and interesting discussions. You are invited to bring your own recordings for reference.

The forum of our HongKong Hifi products distributor Audio Exotics had this hilarious conversation: "DSo was complaining to Marvel about me bringing this CC1 to his home just when he felt his system was in optimum state. Later on, he SMS-ed and said, "PT, after you took back the CC1, I had no mood to listen tonight. As a result, I went out drinking with friends."


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  • During our sessions with Grammy winning saxophonist Kenny Garrett, the CC1 made all the difference in the world!

    Al Pryor & Todd Whitelock, Mack Avenue records, Hempstead (CC1)

  • The CC1 is a brilliantly designed piece of equipment. Every piece of gear that I plugged into it sounded better and more natural.

    Erik Zobler, Mix Magazine, Los Angeles (CC1)

  • Grimm Audio enriches the Loudness Movement with exceptionally price worthy and designful tools.

    Dieter Kahlen, Studio Magazin, Oberhausen (LevelView)

  • Just recorded Mahler 1 with Filharmonie and Edo de Waart. We had the Grimm LS1's on trial. Never heard so much in a recording, really impressive.

    Steven Maes, Motor Music, Mechelen (LS1)

  • The LS1 seems to be a melting pot for all your expertises. I just find it fascinating. I am quite certain that the LS1 is at least the very very best 'value' in the market right now.

    Wai-Shan Lam, hifi enthusiast, Hong Kong (LS1)

  • I didn't know clock influence was that big!

    Tim Vine-Lott, Air studios, London (CC1)

  • It seems as if the musicians have more fun when they play music.

    Ingo Iebhart, hifi enthusiast, Eberdingen (CC1)

  • A fantastic experience to work with this device.

    Hein Dekker, producer for Channel Classics, Baarn (AD1)

  • Very impressive.

    Steve Hall, Future Disc, Los Angeles (AD1)

  • I had expected a small sound improvement. What happened is just the opposite: I am very impressed.

    Gerd Hoppe, hifi enthusiast, Alicante (CC1)

  • This is a major improvement. We need much less eq on the high end, the low end sounds more solid and the punch on the snare is great. This clock is a large improvement, we were amazed.

    Peter Riebeek, Studio 150, Amsterdam (CC1)

  • This is probably the most 'correct' loudspeaker I've ever laid ears on. The combined honesty, neutrality and pleasing musicality is at a level that I haven't come across before.

    Christian Rechenbach, EinsNull magazin, Duisburg (LS1)

  • I'm now using a DSD converter called a GRIMM for my SACD mastering. Big improvement.

    Steve Hoffman, Audio Fidelity, Los Angeles (AD1)

  • I have used all high end AD converters known to date. Every one of them had a sound to it. Your converter doesn't: it is completely transparant!

    René Gambini, Lyrinx, Marseille (AD1)

  • After all these years I finally have a standard on which I can rely.

    Al Pryor, Mack Avenue records, Hempstead (LS1)

  • If someone came up with the idea to call the LS1 the best speakers he's ever heard, I would join in with a smile.

    Max Schlundt, Kultur...Technik, Berlin (LS1)

  • You have to work hard on the LS1's to get a good sounding mix, but once you have it, you can be sure it really is a good mix.

    Wessel Oltheten, Pro Audio & Video magazine, Buren (LS1)

  • I was focusing more on the music than the equipment, something that rarely happens when I listen to digital...

    Tony Bolton, Hi-fi World, London (CC1)

  • I did some sessions in 44.1, 48 and 96. It works great, and sounds fantastic. The CC1 is such a great upgrade in the studio, amazing!

    Samuel Girardin, Point d'Orgue, Montreal (CC1)

  • I was thrilled with your power supplies for my Neumann M50's. We used those mics for an upcoming Chandos release of the Kansas City Chorus, and they were stunning.

    John Newton, Soundmirror, Boston (MP1)

  • Sensational! I have never found this quality in any commercial AD converter.

    Ronald Prent, Galaxy Studios, Mol (AD1)

  • I'm in tears, listening to my own recordings.

    Ben Zijlstra, Dutch Film & Television Academy, Amsterdam (CC1)

  • This is a revelation. It is the first time in my 20 years of digital recording that I hear a fundamental improvement in sound quality.

    Leo de Klerk, Bloomline Studio, 's Gravendeel (AD1)

  • I heard the LS1 in NYC at the AES Convention... man, I was really impressed. Although it was at the booth, I could identify my mix immediately. So far the best speakers I've heard.

    Christian Klotzbücher, Kunstuniversität Graz, Graz (LS1)

  • This is a larger improvement than I expected. The sound actually gains quality in all aspects.

    Marnix Bosman, HVT magazine, Baarn (CC1)

  • One for all and everything.

    Fritz Fey, Studio Magazin, Oberhausen (LS1)

  • A signal that sounds pretty decent with a good clock, sounds just incredible with the Grimm Clock.

    Hay Zeelen, Hay Zeelen Mastering, Amsterdam (CC1)

  • I was impressed by how my chain with the EMM's got a benefit when I added a Grimm clock to my setup. Guided by what the literature and many designers are saying I was stunned about the change in a positive way) in sound.

    Daniel Dettwiler, Idee und Klang Studio, Basel (CC1)

  • The LS1's frequency response is unusually flat - indeed the flattest we've ever measured.

    Keith Howard, Hi-Fi News, Croydon (LS1)

  • The jitter measurement results of the CC1 were the best of all competitors.

    Friedemann Kootz, Studio Magazin, Oberhausen (CC1)

  • Realize that not all timepieces are created equally. In this regard, the Grimm CC1 has no peer.

    Bob Katz and Garrett Haines, TapeOp, Sacramanto (CC1)

  • Throughout even the most turbulent passages the recording space stays luxuriously illuminated and the soundstage remains absolutely clear.

    Reinhold Martin, Hifi Statement Net Magazine, Gröbenzell (CC1)

  • The AD1 made the most realistic recording of my piano that I have ever heard. Incredibly realistic and involving.

    Mark Conese, Ambient Records, Stamford (AD1)

  • Last week I was recording a strings section and piano. My client was very happy and he asked me if I changed something in the studio. Of course, it was your CC1.

    Josep Umbria, Calma Estudis, Manacor (CC1)

  • We are very impressed by the quality of this unit.

    Günther Pauler, Pauler Acoustics, Northeim (CC1)

  • A world class machine!

    Yasushi Hamase, Be-Tone Studio, Kanagawa-Ken (AD1)

  • I was in the opportunity to hear your CC1 unit and I have to say INCREDIBLE!!

    Carlos Imperatori, Producciones Tumbador, Caracas (CC1)

  • Suddenly and distinctly, there's a palpable increase in naturalness, extension and spaciousness.

    Nicholas Bedworth, Positive Feedback, Makawao (CC1)

  • Did Grimm Audio reinvent the loudspeaker?

    Bert Oling, Hi-fi Video Test, Nijmegen (LS1)

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