COLT Duo Acoustic End-button 90º
FASTER COLT DUO – Acoustic End-Button – Cello, has been developed from the FASTER PRO violin model and adapted to the acoustic characteristics of the cello. It features an elaborate, compact, and complex design that enhances the cello’s sound and tonal quality, combined with increased harmonics and improved acoustic emission.
By incorporating two specific silver tubes with internal compressors, the FASTER COLT DUO eliminates the residual air generated inside the cello’s soundboard, which limits its vibration capacity. It reproduces the vibrations of the lower area of the cello’s soundboard and other adjacent parts, generating a significant amount of acoustic power and contributing to the growth of harmonics, which are reinforced by increasing the intensity of the emerging air collected by the two silver tubes.
FASTER COLT DUO substantially inhibits vibration dispersion. works on the cello as an “all-in-one”:
- Enhances radiated energy.
- Amplifies sound production and acoustic projection.
- Distributes and organizes the frequency spectrum.
- Offers high acoustic stability under pressure and humidity variations.
- Increases harmonic production.
- Expands dynamic range.
- Increases timbre quality.
- Facilitates playing.
- Increases response speed.
- Reduces, in most cases, the production of wolf tones.
- Eliminates, in specific cases, the production of wolf tones.
- Prevents the loss of a large portion of the acoustic energy produced by the cello as well as the transfer of unwanted frequencies.
- Transmits the recovered energy, acting as a passive amplifier.
The COLT DUO is the ideal complement to the FASTER Artica, Dorna, and Meiga acoustic end pins for cello, as well as the BELTON acoustic stoppers. The combination of these elements undoubtedly offers an abundant amount of quality sound and great playability.
When you need to install your COLT DUO on a different cello, simply purchase a replacement COLT Cone, adapt it to the new instrument, and attach your COLT DUO
Taxes / VAT and shipping not included
TECHNICAL CHARACTERISTICS
- End-Button with a single size, suitable for any 10 mm diameter cello end pin.
- Weight: ± 63gr.
- Measurements and t: 3.5 x 3 x17cm.
- Offers great comfort and precision in opening and closing, exerting a high degree of coupling force with approximately half a turn of the tightening knob.
- Simple assembly system using an easily adaptable universal cone (from ∅ 28 to 25 mm) machined from insulating thermoplastic resin.
- Dynamic interior blocking system against parasitic vibrations, made of elastic polymer with maximum mechanical resistance.
- End-Button made of composite with high dimensional stability, excellent hardness, and density that favors the speed of sound propagation. This material offers high resistance to traction, deformation, and wear due to friction.
- Two 935 silver tubes, 8.4 and 9.9 cm respectively, and 7 mm in diameter, with brass and silver compressors.
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Ilmari Hopkins
Co-Principal Cello, Stavanger Symphony Orchestra Cello Lecturer, University of Stavanger Cello Faculty, OA Orchestra of the Americas
For a long time I have been searching for a perfect endpin to match the fine sound of the old and precious English cello I’m playing. After having tried around twenty different endpins, including renowned brands like Mitsuke and Berliner, I was beginning to lose hope to find anything that would make a real difference. But the FASTER Artica 600 Titanium endpin was a game changer: it makes my cello even clearer and easy playing than it already was, but above all, it adds an amazing amount of projection and warmth to the sound. I can warmly recommend it to all cellists.
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Mathias Johansen
Cello Soloist – Germany. Professor am Vorarlberger Landeskonservatorium Feldkirch - Österreich.
Ever again without it!
What difference can an endpin make? To me they all sounded quite similar. Of course a massive steel or titanium endpin was different from carbon but it didnt really change a lot.
This one though blows my mind!
I have no idea why it can work like that, but the cello just got a 2 level upgrade – yay!
This FASTER Artica endpin really has changed the sound and playability of my cello A LOT!
For some reason that I dont understand yet it makes my cello – play easier – resonate way (!) better – have more bass – have more overtones – have more direct attack.
What else would you want from an upgrade?? And this one is no mini dose like many other upgrades I‘ve done and tried.
Now you would assume its connected to the vibration transmission from instrument to the ground. Wrong. Theres also a end-button for violas and violins and the effect is just the same! I just don‘t get it!
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Ángel García Jermann
Cello soloist and pedagogue – Madrid - Spain
Dear José María,
Just a few days ago we installed your revolutionary “FASTER” system with an Artica 600 Titanium end pin, a Colt Duo Silver acoustic button and a Belton Solo Acoustic end pin Stopper on my Contreras cello and I have to say that the result is simply overwhelming.
Throughout my career I have avoided inventions that promised to increase the volume of the sound since in the vast majority of cases this increase was produced at the cost of sacrificing sound quality. With your brilliant invention, “the FASTER system”, my cello has easily gained 50% more sound projection in the room. It allows it to fully develop all its potential for tonal and sonorous colour. The speed of reaction to the smallest nuances of bow pressure is simply impressive.
I had heard about your invention and I admit that I listened to it with a lot of skepticism since on many occasions musicians tend to exaggerate when we talk about our instruments. After trying it, I can only corroborate and reaffirm all the testimonies I knew about FASTER.
I encourage all string musicians, not only cellists, to try this revolutionary invention, to install and experience “first hand” the enormous effect that FASTER has on sound and to open the door to a totally unknown and fascinating sound dimension with it!
Thank you so much for your creativity, knowledge and work!!
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André Cameron
Retired violist - La Scala Orchestra Gulbenkian Orchestra
Master, I’ve been on a honeymoon with my guitar ever since I installed Faster Pro Silver. It feels like I’m playing a brand-new instrument. A better instrument! Thank you so much for this wonderful invention.
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Sarn Oliver
San Francisco Symphony Violinist.
I recently had the good fortune to discover the “Faster” violin button resonators. Some of the violins I have installed them in: Stradivari , Gagliano, Guarnari, Bergonzi great modern violins and more. No matter how good the violins sounded to start out there was a clearly discernible improvement in the ringing and freedom of the sound of all of them. More power, not tighter but looser. In addition it removed entirely or greatly improved wolf’s if there were any and increased the sensitivity of response! We have also found it to increase the power in the concert hall. My colleagues and clients have all been grateful and impressed with this innovation! Bravo Jose!
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Dr. Carmine Miranda
Cello Soloist – USA Assistant Professor of Cello - Belmont University
“The Faster endpin and button by Jose Maria Lozano are far more than just accessories – they are true masterpieces of modern engineering that revolutionize the cello playing experience. With their innovative design, they offer exceptional clarity and projection, along with a stability that gives the player total security and freedom. It’s remarkable how these innovations can transform the sound and feel of the instrument so profoundly and elegantly.” -
Ferdinando Trematore
Violin Soloist and member of Trio Arbós
Dear José María,
Fitting the FASTER Pro – Silver to my Guadagnini was like unlocking a hidden chamber in the violin’s voice. The moment I drew the bow, it was as if the instrument exhaled a richer, more nuanced breath: every note shimmered with crystalline overtones that seemed to float above the air.
The FASTER Pro – Silver has opened a secret passageway in the soundscape: I can dive into deepest pianissimo and rise to thunderous fortissimo without a hint of grain or fatigue.
On stage, the violin’s projection feels almost magical. Its voice carries effortlessly, wrapping the hall in a tapestry of sound. In chamber music, it blends like silk, yet still retains a singular, brilliant thread that guides the ear. The wolf-tone that once lurked on my G-string has vanished, replaced by a steady, sparkling resonance that invites exploration.
Playability has taken a leap, too. The bow dances more freely across the strings, making sautillé runs feel buoyant and crisp. Complex double stops respond with surprising ease, and long legato lines sing uninterrupted, as though the violin itself leans into the bow.
What truly astonishes me is the consistency: from damp backstage corridors to lofty cathedral ceilings, the FASTER Pro delivers the same radiant voice. And it does so without altering a single inch of the Guadagnini’s body—pure enhancement, pure integrity.
Thank you, José María, for this ingenious marvel. The FASTER Pro – Silver doesn’t just amplify sound, it reveals the soul of the instrument and, in a way, my own.
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Johannes Raab
Cello Soloist – Germany
At last, I’ve had the chance to try the endpin. I should say that I’ve tried almost every cello endpin on the market, and I have about 30 different ones to compare. Your endpin is absolutely incredible! I think there isn’t a better endpin on the market right now than yours. In my opinion, it should be equally suitable for every instrument. Thank you very much for letting me play with this endpin. I will definitely use your endpin for important recordings and concerts in the future. Also, I’ll recommend that my students and friends try your products!
I’m impressed and excited about your endpin!
