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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 various connectors and interfaces that we support in our TPR cable web shop. The writing took quite some effort, but we are glad to see that the document has become a pretty decent reference. We hope you enjoy it!

Dutch online hifi magazine “Alpha Audio” did a shoot-out review of interlinks. TPR was ranked as ‘The Best’. “The sound stage renders almost holographic with a very high precision and spaciousness, as if there is no cable at all. (…) Localisation of instruments is precise and vocals are spot-on in the centre. (…) This interlink really let’s you hear everything in the music and does not mask a thing.”

Dutch magazine Interface reviews our TPR cable. They quote Ronald Prent of Wisseloord Studios, who ordered TPR for all cabling in their facility: "The stereo image with TPR is perfect and one experiences that in the incedibly stable and small phantom image with mono signals. It’s like using a center speaker." Interface reviewer Marnix Bosman writes: "TPR is the first affordable cable I know of with the neutrality, transparency and speed of very expensive cables."

Our Belgium dealer iDeal Audio installed the gear, cabling and acoustics of the new studio of Little Major Mastering in Antwerp, Belgium. Owner Philip Opdebeeck is passionate about his Grimm Audio gear. About the LS1’s he says: "The transparency of the best digital sound, without the harshness, in combination with analog warmth, without the hiss and distortion. This is the best I’ve heard, and I’ve heard many mastering speakers." About the CC1: "Definitely turns every other master clock pale. Unique sound quality like ultimate musical timing and stability of tone." About TPR: "And Grimm did it again, making a cable that outperforms all the others providing an impressive stereo image and a stunningly accurate phantom center."

During Musik Messe we announced that Grimm Audio has developed a new affordable cable named ’TPR’ for the rejuvenated Wisseloord Studios in The Netherlands. After creative director Ronald Prent ascertained that TPR approached the performance of his favorite Grimm TPM cable, he ordered 3 km of 16 pair multicable and a few km of single wire. TPR will be available from September.


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  • Phenomenal!

    Jan de Jeu, Music Emotion magazine, Amsterdam (LS1a)

  • The Grimm LS1be offers a much higher absolute audio quality than all of the overpriced astronomical speakers on today's premium audio market

    Zhong Yi, HiFi Review, Hong Kong (LS1be)

  • The low-frequency temporal resolution is high, and the rendering of tonal pitch in the extremely low-frequency range is very precise

    Sam Ho, HiFi Review, Hong Kong (LS1be)

  • It will be almost impossible to achieve the same sound quality when spending the same price on separate hifi components

    Archimedes Chan, HiFi Review, Hong Kong (LS1be)

  • If you like a fast, solid and accurate music reproduction for all kinds of music, this system will surprise you!

    River Chan, HiFi Review, Hong Kong (LS1be)

  • The LS1 is by far the best speaker that AUDIO had the pleasure of reviewing in over 35 years; this especially in the two crucial audiophile disciplines of neutrality and detail reproduction.

    Wolfram Eifert, AUDIO, Stuttgart (LS1)

  • I could always hear improvements in sound quality

    Marnix Bosman, Interface, Amsterdam (CC2)

  • I have already made better, faster decisions in my mixes, and have had more confidence in delivering my masters.

    Thaddeus Moore, Liquid Mastering, Eugene (LS1)

  • Truly, this could be the last system you'll ever buy; an endgame solution.

    Marja Vanderloo & Henk Boot, 6Moons (LS1be)

  • As it turns out, Truth equals Love.

    Timothy Roth, Positive Feedback (LS1)

  • LevelView is a fascinating loudness metering system that is hard to go without once you try it.

    Tommy Zai, KVR, Phoenix (LevelView)

  • I want to congratulate you for making the best sounding, most phase linear, transient accurate, and all around beautiful speaker system on the planet

    Thaddeus Moore, Liquid Mastering, Eugene (LS1)

  • 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 week we used the MP1’s with the M50s of my colleague. We were both astonished.

    Noah Scot Snyder, Los Angeles (MP1)

  • Grimm products have that typically Dutch sound character that I love: warm but clear.

    Yasushi Hamase, Be-Tone studio, Kawasaki City (AD1)

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

    Friedemann Kootz, Studio Magazin, Oberhausen (CC1)

  • Accurate, transparent and beautiful, that is the Grimm Audio LS1

    Jack Liu, AudioArt magazine, Taipei (LS1)

  • The Grimm DSD and Channel Classics have captured a perfect balance between energy, liveliness and comfortable sound.

    Teresa Goodwin, Positive Feedback (AD1)

  • After installing your CC1, I often catch myself thinking that I listen to 88.2 when in reality it is 44.1. Their difference used to be much larger, and both sound much better now.

    Reyn Ouwehand, Studio The Church, Wijdenes (CC1)

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

    Carlos Imperatori, Producciones Tumbador, Caracas (CC1)

  • My audition of the LS1 was a transformative experience.

    George Massenburg, McGill University, Montreal (LS1)

  • Its job is so critical that I’d never settle for less.

    Richard Chycki, Toronto (CC1)

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

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

  • This clock is incredible. The detail and imaging from it are superior to anything we heard.

    Allen Farmelo, Pink Noise magazine, Hopewell Junction (CC1)

  • This is the first plug-n-play, all-in-one, system with true high-end sound.

    Marshall Nack, Positive Feedback (LS1)

  • A second Grammy: your technology helped me get there…

    Al Pryor, Mack Avenue Records, New York (LS1)

  • You must hear that! Absolutely!

    Fritz Fey, Studio Magazin, Oberhausen (LS1be)

  • One for all and everything.

    Fritz Fey, Studio Magazin, Oberhausen (LS1)

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

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

  • My new studio is wired with TPR

    Dave Collins, Dave Collins Mastering, Los Angeles (TPR)

  • 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)

  • TPR outperforms all the others providing an impressive stereo image and a stunningly accurate phantom center.

    Philip Opdebeeck, Little Major Mastering, Antwerp (TPR)

  • The combination of Grimm Audio TPR with Neutrik EMC XLR's seems to me to be the non plus ultra at the moment.

    Günter Pauler, Stockfish Records, Northeim (TPR)

  • Grimm's mission to eliminate the sound of the system and present just the original recording seems totally true.

    Josep Armengol, Revista On Off, Madrid (LS1)

  • I won't get my monitoring better than this. Mastering party all day, every day!

    Frederik DeJongh, Jerboa Mastering, Gent (LS1)

  • I've played everything from Rammstein to chamber music on these speakers, and they eat everything raw.

    Roy Ervin Solstad, Stereo+, Oslo (LS1)

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

    Steve Hoffman, Audio Fidelity, Los Angeles (AD1)

  • 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)

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

    Al Pryor, Mack Avenue records, Hempstead (LS1)

  • Their natural sound and their unimposing, deep trueness kept overwhelming me and my colleagues.

    Bernhard Rietschel, Editor in Chief of AUDIO, Stuttgart (LS1)

  • Among all the truly excellent SACDs from Channel Classics, the very best sound quality wise is the Mahler 4th recorded with the Grimm IMHO.

    Chris Fredriksson, HiFi enthusiast, Sweden (AD1)

  • 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)

  • 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)

  • I switch over to Grimm TPR tomorrow. After extensive testing I could not find a better alternative. This cable gets so close to the original it's frightening.

    Mark den Hartog, Zownd Mastering, Leiderdorp (TPR)

  • 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)

  • 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 a speaker that sets a reference level and everybody should hear it, regardless of whether he intends to buy it or not !

    Dimitris Stamatakos, AVMentor, Athens (LS1)

  • 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)

  • I’m afraid my english isn’t good enough to describe the overwhelming feeling while listening to music, reproduced by the LS1.

    Ulrich Watermann, Berlin (LS1)

  • I could not be more impressed.

    George Massenburg, McGill University, Montreal (LS1)

  • Wow, what a difference...!

    Ronald Wanders, hifi enthusiast, Zeewolde (TPM)

  • With the Grimm LS1 unexpected details appear in the recordings: nothing is hidden, and everything sounds delicious.

    Josep Armengol, Revista On Off, Madrid (LS1)

  • The reviews I read are good, but to me what I experienced in our system was greater.

    Aaron Gandia, Phat Planet Studios, Orlando (CC1)

  • The jury could only applaud.

    Joachim Pfeiffer, Audio Flatscreen Journal, Wuppertal (LS1be)

  • A fantastic experience to work with this device.

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

  • These dmf subs are insane! It took me 30 seconds to decide I had to buy them. Authoritative, open, tight, life-like, in one word: wow!

    Wessel Oltheten, Spoor 14, Boxtel (LS1s-dmf)

  • This is the most exciting, strange, beautiful, ridiculously convenient piece of non-audiophile audiophile gear I have seen or heard. These things are a bit science fiction really.

    Bogdan Roscic, President Sony Classical, Berlin (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)

  • The LS1be has a very beautiful low end, that not only goes to great depth, but is of exceptional pureness.

    Marnix Bosman, HVT magazine, Nijmegen (LS1be)

  • Best sound of show, stunning, Meisterhaft.

    Theo Wubbolts, HVT magazine, Nijmegen (LS1)

  • What impressed me the most is the purity of the sound and the sound field in general. (...) You can work so fast now to get the sound right!

    Stefan Riel, Echo Beach, Kuala Lumpur (LS1)

  • I love your cable because it is effectively inaudible. With TPR, cable quality is no issue anymore.

    Jan Didden, Linear Audio, Turnhout (TPR)

  • 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)

  • 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)

  • I had that feeling of an open window into sound, across a wide range of music styles.

    Nigel Palmer, Audio Media, London (LS1)

  • The CC1 brings out a level of detail and clarity that I had dismissed as only possible with analog.

    John Davis, The Bunker Studio, New York (CC1)

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

    Marnix Bosman, HVT magazine, Baarn (CC1)

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

    Ronald Prent, Galaxy Studios, Mol (AD1)

  • From the first minute I knew that something very special was happening. (...) The quality surpasses everything I heard before on my system.

    Gerard Lombrez, Lille (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)

  • A great new day here with a relaxed and very detailed sound in the monitors and between all analog gear.

    Hudson Fair, Atelier HudSonic, Chicago (TPR)

  • 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)

  • Did Grimm Audio reinvent the loudspeaker?

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

  • The naturalness of the LS1 turns me on big time.

    Wolfram Eifert, AUDIOphile, Stuttgart (LS1)

  • A world class machine!

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

  • These are the most immersive, dynamic, detail-rich, nuanced, elegant, engaging, emotional, and yes, musical speakers I have ever heard. By far.

    Timothy Roth, Positive Feedback (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)

  • 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)

  • 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)

  • 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)

  • For those looking after the exact sound of a recording, the Grimm solution cannot be beat.

    Marja Vanderloo & Henk Boot, 6Moons (LS1)

  • The sound of Grimm recorded SACD's is AMAZING, it totally closes the gap between analog and digital.

    Hiro, Pure Super Audio (AD1)

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

    Gerd Hoppe, hifi enthusiast, Alicante (CC1)

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

    Günther Pauler, Pauler Acoustics, Northeim (CC1)

  • You will have to go to great lengths to find something that matches this sound quality for the same price.

    Roy Ervin Solstad, Stereo+, Oslo (LS1)

  • I'm not the 'Ahhh & Ohhh' type of guy when it comes to subtle differences, but the difference this makes is so clear.

    Audioenzo, Dordrecht (TPR)

  • The system (...) is the equal of systems of hundred thousands of Euros when it comes to aspects like neutrality, purity and naturalness of tone.

    Clemens Wergin, Die Welt, Berlin (LS1)

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

    Ingo Iebhart, hifi enthusiast, Eberdingen (CC1)

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

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

  • My most impressive upgrade so far!

    Puck Leek, Pucksound, Amsterdam (CC2)

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

    Dieter Kahlen, Studio Magazin, Oberhausen (LevelView)

  • 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)

  • A facility is as good as its weakest link and by using TPR the cables are not a weak link anymore.

    Ronald Prent, Wisseloord Studios, Hilversum (TPR)

  • This is such an incredibly good speaker.

    Jaap Veenstra, Alpha Audio, Haarlem (LS1be)

  • Very impressive.

    Steve Hall, Future Disc, Los Angeles (AD1)

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

    Nicholas Bedworth, Positive Feedback, Makawao (CC1)

  • I've listened to so much music and films and heard space and details I have never heard before.

    Bart Jilesen, Studio Bart Jilesen, Utrecht (LS1)

  • 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)

  • I LOVE the clean transfer of your TPR cable. It´s like there´s no cable at all.

    George Tanderø, Mixing & Mastering, Oslo (TPR)

  • I love the speed, transparency and neutrality of this cable.

    Marnix Bosman, HVT, Nijmegen (TPM)

  • The sound stage renders almost holographic with a very high precision and spaciousness, as if there is no cable at all.

    Harro Tillema, Alpha Audio, The Netherlands (TPR)

  • Those subwoofers are pretty darned impressive. Thanks!

    Aaron Garrett, hifi enthusiast, Cambridge (LS1s-dmf)

  • Truly a remarkable system, the equal or better of anything I've ever heard.

    Dave Collins, Dave Collins Mastering, Los Angeles (LS1)

  • I had a client ask why my mixes were so much better this week.

    John Davis, The Bunker Studio, New York (CC1)

  • I’ve rewired my studio with TPR cable and I now bring some with me to recording sessions as well. It is extraordinary cable.

    Noah Scot Snyder, Los Angeles (TPR)

  • I buy and sell a lot of stuff, but the CC1 is not leaving the building.

    Alex Abrash, AA Mastering, New York (CC1)

  • Not something good, but something already exquisite has further been improved.

    Fritz Fey, Studio Magazin, Oberhausen (LS1)

  • We are honestly not able to assemble a component based system that performs better than this active system from Holland.

    Jaap Veenstra, Alpha Audio, Haarlem (LS1a)

  • Total peace of mind

    Marja Vanderloo & Henk Boot, 6Moons (LS1be)

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