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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Manel Porta.
Violinist - Royal Philharmonic Orchestra. London, England
FASTER, what a great invention!
The first thing I noticed is how much faster the instrument’s sound opens. And above all, the ease in the response!
Bravo, maestro!
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David Adorjan
Principal cellist - Deutsches Symphonie-Orchester. Berlin, Germany
All beautifully crafted models of the FASTER Artica cello endpin sound fabulous. They are just awesome!
All of them sound undoubtedly different, but if they have one thing in common, and I think they do, is that they make the sound more clean and round, bright and projective.
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Giovanni Radivo
Concertmaster - Orquestre National de Lyon. France
I have installed the FASTER Silver in my Vuillaume violin. The sound is simply amazing, very free, with plenty of harmonics, and incredible tone quality.
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Massimo Quarta
Violin soloist & conductor – Italy
I have extensively tried the FASTER Silver in my G. A. Rocca violin with different pieces of music, and various acoustics, and I feel happy to let you know that it did improve the sound of my violin!
Not only is it more powerful, but also more rounded, and it did improve a lot the clarity of the sound.
Besides, the possibility of closing the hole with the small plastic cap gives me the option to opting for a more compact sound if needed without losing all the harmonics-related benefits that the silver button adds.
Thank you very much. You did a fantastic job!
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Glauco Bertagnin
Violin soloist - Padova, Italy
I am impressed with the result after installing the FASTER Titanium in my Stefano Scarampella violin. The change has surprised me because I did not think it would be so evident. I have to admit that in the beginning, I had my doubts as to the outcome. The sound production is now quicker, and the medium-low range has improved so much! Previously, my violin had a very powerful E-string, which made sound balance at stake. I tried various sound adjustments, but the result was never successful. Ever since I installed the FASTER Titanium, the violin’s sound production is better. It has gained harmonic richness, which has turned sound production smoother and sweeter.
Thank you very much! Love,
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Joan Espina
Violin soloist - Orquesta Nacional de España - Madrid, Spain
When someone shows you FASTER, a mix of surprise and skepticism over something so small and simple-looking overwhelms you. Once installed in the violin, you cannot go backward and do without it. Without hesitation, FASTER is the most ground-breaking invention, and also the one that has most contributed in terms of sound to string instruments in the last three hundred years.
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Seoyun Moon
Violinist - Paris, France
Thank you very much for inventing FASTER Silver. It has given my violin a new life!
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Enrico Balboni
Concertmaster - Orchestra del Teatro La Fenice di Venezia. Italy
I had heard good reviews from fellow musicians who had installed FASTER in their instruments, so I decided to do the same in my Stefano Scarampella violin.
With FASTER Silver, the instrument has immediately responded with much effortless sound production and an increase in harmonics and brightness. The sound is now warmer and complete, to such an extent that I decided to install another one in my Roberto Collini viola, obtaining a more than satisfactory response.
I wholeheartedly thank maestro José María Lozano for this fantastic opportunity, and without reservations recommend FASTER to all those seeking to improve the quality of their instruments.








