Endorsements
January 21, 2010
Jamie Laredo - Prof. Jacobs School of Music, Indiana University, violinist Kaltckstein, Laredo, Robinson Trio
" I have been the proud owner of beautiful gold Fleur-de-lis Berg violin bow for many years and have been extremely happy with it. However, the new 'Tourte-Voirin' model which I commissioned recently is really astonishing. Its special flexural and sound quality is as good ad most great French bows that I have performed with. It excels in its remarkable steadiness on the strings.
I couldn't be happier with its qualities! It is also a stunningly beautiful looking bow, superbly crafted."
Jamie Laredo,
January 07, 2010
Mimi Zweig - Indiana University Jacobs School of Music - Professor of violin and viola
"I have been playing Berg Bows since 1985 and have many of them in my bow collection. The latest model is quite remarkable. I first played it this past summer (2009) and after a few minutes I was in love. It felt completely natural and it was capable of doing anything. Also it looks very beautiful and is superbly crafted."
M.Zweig
January 07, 2010
CSABA ERDELYI
- Internationally-renowned Viola Soloist, Quartet Violist, Principal Violist, Professor of Viola and Chamber Music.
"I am the happy owner of two deluxe Berg viola bows, one silver and one gold, made for me by master bow maker Michael F. Duff in Bloomington, Indiana.
I consider it a special privilege to be able to collaborate with living masters who create "tailor-made" violas and bows to suit my style of playing and personality.
Michael and I have been "talking bows" for over twenty years. IN the beginning he asked to borrow my fine Sartory and Vigneron bows for analysis and study.
Berg bows are made of special resins molded into bow shape under high pressure and temperature. For the viola bow that I commissioned I was able to meet with Mr. to discuss important details of the hand finishing, for example, weight, balance, and especially the head, which he shaped according to my wishes.
Because of Mr. Duff's mastery each of his bows is made unique. They look just as beautiful as my precious old pernambuco wood bows. Berg bows make a wonderful deep rich sound, and handle all styles of music superbly. I play my gold mounted Berg bow with great pleasure every day."
January 07, 2010
Augustin Hadelich
- Soloist, Winner 2006 Indianapolis Violin
Competition
"Michael, the Berg bow crafted by you and awarded to me, as one of the prizes for winning the gold medal at the Indianapolis International Violin Competition in 2006, is excellent. The sound is very beautiful, and the bow has great balance. It always does exactly what you want it to, resulting in clean crisp articulation. I love performing with it."
January 07, 2010
Uli Widmaier
"Dear Michael
My Gulli-model deluxe Berg violin bow, which I ordered from you in 2006, is doing wonderfully well. It is far - and I mean FAR -superior to my Sartory, not only in handling but also in sound production. I have completely stopped using the Sartory, and I will probably sell it.
My daughter now needs a really good violin bow as well. There is no alternative to your bows. Therefore I would like to order a deluxe one from you, for her."
Uli Widmaier
Eduard Melkus of Baden Austria
"Michael, Your new Tourte-Voirin model Berg violin bow arrived today-it is a wonder-a true fairy bow, it dances over the strings. It produces the sweetest sound from my violin. Should I refer to it as “ He” or “She”? I prefer “She – I find her like a ballet primadonna – a Margot Fontain of bows, or a Nureyev, in which case I shall I shall use “He”. The mail took me by surprise, but what a pleasant one! I have never experienced such a delight in meeting a new bow and have played many fine bows over my career. As you know, for over twenty years I have performed with only your bow, which I bought in Exeter, England. Meeting the new one today was such an inspiration that I at once tried all sorts of sophisticated bowings, and it worked immediately on all. I can’t stress too much “His” beauty, this is evident with all of your bows. Did I tell you that the distinguished German violin maker Schade from Halle (the famous Handel city) did not believe me when I told him your bow was not pernambuco wood! Back to “His” or “Her ’qualities – she is like a younger sister to my older Berg bow, dancing over the strings and giving fun, joy and pleasure. Michael, I have never in all my life written anything like this, not about any bow, or violin, but with your surprise parcel I became really enthusiastic and had to write from my soul and heart. I have already decided to go on playing and concertizing , just to enjoy for a longer time my new love! THANK YOU! God bless your hands and your genius.
"
Ever your Eduard
David Matheu Haskell-Bell of Spain - Former student of famous violist
Rivka Golani
"Michael I performed an orchestral concert with my new bow just ten minutes after receiving it. I really think it is an excellent bow, able to bounce clearly and escape fast from the string. It produces a deep and earthy sound, a "paste" sound we violists would say. Many thanks for your excellent work. The final result is much better than I ever expected.
"
Yohei Nakajima
"Thank you very much for the new bow I received it last week, and I absolutely love the bow. It has fantastic flexible control and any bow strokes are easier and more brilliant, and can create many more different color in sounds. I just love the bow.
Also good news,, I won a chamber music competition (in String Trio) yesterday with the new bow! It made a fantastic sound and created wonderful music.
I will recommend the bow to all my friends, musicians,,,
"
The Late Joseph
Gingold - Distinguished Professor Emeritus of Music, Indiana
University, U.S.A.
"My Dear Mr. Duff, I enjoyed
playing with the Berg violin bow and found it to be of excellent quality. I hope
that it will meet with the success it deserves."
Arnold Steinhardt -
Violinist, Principal
Violinist, Guarneri Quartet, U.S.A.
"I am delighted with the Berg Bow. It is strong yet supple,
bounces well and pulls a good sound out of the violin. In short, it does what a
bow is supposed to do. Congratulations on your fine work."
The
Late Yfrah Neaman O.B.E., F.G.S.M. - Soloist &
Professor, Guildhall School of Music & Drama, London, England
"The more I use my Berg Bow,
the more I have come to appreciate and admire its playing qualities and its
refined craftsmanship."

Jaime Laredo
- Conductor, Soloist and
Violinist, Kalichstein-Laredo-Robinson Trio, West Brattleboro, Vermont, USA
"I find my Berg
bow has everything a good bow needs, strength, suppleness, good balance and a
warm sound. It's been a good friend and companion on stage!"
Peter Schaffer - Soloist &
Professor, University of Illinois,
"The Berg Bow is fully equal
to the bows of the French masters, both in appearance and performance quality. I
have played my Berg Bows under all conditions; orchestral, chamber music and
solo concerts. They have excellent balance, fast response, very clear
articulation and well focused, big sound. It is of great merit that one can
choose a Berg Bow with the weight and resilience to satisfy personal
preferences."
Emanuel Borok - Soloist & Concertmaster,
Dallas Symphony, Texas, USA
"I have had a Berg Bow
for many years and have enjoyed playing it as Concertmaster. I cannot deny that
one of the pleasures it gives me is to see the expression on people's faces,
when I tell them it isn't pernambuco. Not to mention the sense of security,
safety, and increase of zeal I get when I see the notation, 'col loegno,' in my
orchestral part."
Jean Piguet - Principal Concertmaster,
Orchestre de la Suisse Romande, Switzerland
"I am very
appreciative of my Berg violin bow because the bows have excellent balance,
tonal power, reliability and play with ease; all in one very affordable (and
truly unbreakable) bow!"
Earl Carlyss - Violinist,
Juillard Quartet & Prof. of Music, Peabody Conservatory, Baltimore, Maryland,
USA
"My Gold Fleur-de-Lys Berg
Bows make my Guarneri sound so strong and rich. I love their consistency and
balance. I would even go so far as to say that I have yet to find a bow at any
price that makes my instrument sound better."
Igor Ozim -
Soloist & Professor
of Violin, Hochschule, Koln, Germany & Conservatoire, Berne, Switzerland
"The Berg violin bow is particularly good at all off string bowings, like
staccato or ricochet, due to its clean articulation. It is fully equal to a fine
French bow. I have been playing my Berg Bows with my Stradivarius violin in my
concerts in preference to three magnificent F. Tourte violin bows."
Gerald Fischbach -
Director,
International Workshops & Prof. of Music, University of Maryland, USA
"The Berg Bow is
an extraordinary breakthrough. Mr. Duff recently sent me two bows. One reminds
me of a fine Voirin in the way it embraces the strings; the other one is more
Pecatte-like in its articulation and feel. I bought the "Pecatte". Both exhibit
an almost startling lack of idiosyncrasy in response. The bow arm is liberated
from the continuous little compensations for a shiver here, a thin spot there,
that we've come to expect to deal with, even with the finest bows. This is not a
bow you have to get used to; it inspires confidence and relaxation. From the
first stroke you understand that it will do what you ask it to. The Berg Bow
offers a highly centered, clear voice of great integrity & expressiveness. I
enjoy working within its world of sound and especially appreciate the easy
strength of its voice in the upper quarter, where so many bows thin out in
sound."
The Late Franco Gulli - Soloist & Distinguished
Professor of Music, Indiana University, USA link
"I wish to
express my total admiration to Michael Duff for his beautiful, excellent
performing violin bows. I am happy to own one which I play with greatest
pleasure."
The Late Rostislav Dubinsky - Founder of The Borodin
Quartet & Trio, Dir. of Chamber Music, Indiana University
"My Berg violin bows are the bows of my dreams. They have no performance
limitations, responding immediately with their bigger brighter sound, which is
equal from the frog to the tip. I find that their reliability engenders greater
relaxation and freedom and therefore improved sound making and left hand
technique. I have put my fine gold mounted Sartory away forever because it no
longer satisfies me. Now I play my Berg Bows in recording sessions and in
concerts all over the world."
Mimi Zweig - Professor of Music,
Indiana University, USA
"I have been looking
for many years for a reasonably priced bow that equals the performance qualities
of fine French bows. The Berg Bow is the ideal solution for my students. I love
my Berg Bow and play it all the time."
Isidor Saslav - Director of String
Studies, Stephen F. Austin University, Nacogdoches, Texas, USA
"My Berg violin bow is absolutely amazing, astonishing and incredible. This bow
is an absolute godsend - I can't imagine a better one made by anyone. The sound
that this bow draws in the upper quarter without any extra trouble or pressure
has to be experienced to be believed. It effortlessly produces a beautiful
focused tone which is even in quality from the frog all the way to the tip. It
has exemplary quality in the special bowings and delights and astonishes the
performer constantly."
Ruggiero Ricci - World Renowned
Violinist & Professor of Violin, Mozarteum, Salzburg, Austria
"The Berg violin bow has
excellent balance. It produces a strong well focused sound. The taper is very
refined. I consider it to be of excellent quality and value."
Klaus Eichholz - Soloist and
Professor of Violin, Hochschule fur Musik, Graz, Autria
"I have been performing with
my Berg violin bow for some years now and I can highly recommend it. It excels
in spiccato, sautille, ricochet and in cantilena as well. In the former bowings
it jumps effortlessly while in cantilena passages it is very steady on the
strings."
Tadeusz Wronski - Professor of Music,
Academy of Music, Warsaw, Poland
"The many Berg violin bows I have played look beautiful and perform wonderfully
in the special bowings and produce a strong even sound. I play my Berg Bow with
pleasure and will recommend them to my students because they are modestly priced
yet equal in performance to the finest French bows."
Jerry Horner - Violist, retired,
Fine Arts Quartet, University of Wisconsin-Milwaukee
' I am delighted that Michael Duff of Berg Bows has recently begun to
release his viola bows after years of design and experimentation. I find that
they compare with fine pernambuco bows costing much more. In fact it is rare to
discover a modern bow which brings out the best in the finest modern and old
instruments alike. The Berg viola bows succeed admirably. Bravo to Mr. Duff for
adding these beautiful bows to his eminently successful bows for violin and
cello.'
Walter Grimmer - Soloist &
Professor of Cello, Conservatory of Music, Zurich, Switzerland
"The Berg Bows have now
reached such a high level, both in their playing quality and in their superior
design, that it has become a duty for every artist to possess at least one in
his bow collection. Not to forget the great advantage -every student can afford
to buy one!"
Janos Starker
-
Soloist & Distinguished Professor of Music, Indiana University, USA
"As far as I'm concerned, the
idea of the Berg Bow is a valid one. Considering the great improvement it shows
during the years, I believe that it will serve well many cellists now and in the
future."
John Harrison - Violinist, Montclaire
String Quartet, USA
"It is a pleasure to use my
Berg Bow. Although Berg Bows are commended especially for their playability it
is the sound of the bow that makes me love it. Somehow, it brings out the
strongest, most varied, prettiest and sophisticated sound with my violin. Of
course, playability is also outstanding."
William Conable - Soloist &
Professor of Cello, Ohio State University, USA
"I want to tell you how
excited I am about the bow I bought. Things that had been difficult to control
before, just popped out so clean and easy I couldn't believe it. Last week, I
played a recital and many people who have heard me play for years raved about my
sound - including the head of the voice department, the opera director and the
band conductor. Our violinist has been talking all week about how wonderful the
bow makes me sound. I have made the Berg Bow my first bow and put my Tourte in
the box."
Warren Davidson
- Concertmaster, Recitalist, Teacher, Slippery Rock
University, Pennsylvania, USA
"Adding my voice to Csaba Erdelyi's and others: the Berg
is not only the best composite bow available, they sound better than any other
bow I have tried. At the International Viola Congress , I did some blind taste
tests against bows by Emile Ouchard ($15K!), Tubbs, and some contemporary
makers. and in every case listeners chose the Berg as making the best sound. The
Berg is not something to try if you want a great composite bow - it's what you
should try if you are looking for a great bow."
Alan de Veritch - Professor of Music, Indiana
University, Past President, American Viola Society
"Ever since I became aware of the Berg violin and
cello bows in the mid-1990's I have been pressuring Michael Duff to produce a
viola bow. It has been worth the wait! The new Berg viola bows are just what the
doctor ordered. Rarely have I had the good fortune to play a bow that virtually
has it all....and this is it. How unique it is to have a stick be warm and
sensitive at one moment and powerful and articulate the next. Not to mention
it's affordability. I am looking forward to years of camaraderie with my new
Berg bow and plan to encourage my students and colleagues to give the Berg bow
serious consideration as well."
Adam Gruchot -
concertmaster, the Kristiansand Symphony Orchestra of Norway
"The gold mounted bow you made for
me looks fantastic. All of the praise from your distinguished list of clients is
true, so it is hard to add to that!
Its balance is amazing. The sound is big, clear, and I cam make many different
colors and nuances with it. When I desire to produce special kinds of
articulation it responds immediately and easily. In fact it seems to be ahead of
me, anticipating what I desire, so I am much more relaxed playing solos. Also, I
found that playing chords, especially in fugues of J. S. Bach, it gives me a
wonderful relaxed and secure feeling. I don't have to resort to extra pressure
or attack on the chord to get a balanced sound in every voice. I have never had
such a feeling with any other bow. This is the best bow I have ever played.
Thank you Michael for your masterful work. My wife will order one too!"
Victor de Almeida -
Principal Violist, Cincinnati Symphony Orchestra
"In excerpts ranging from Bach
to Bartok, my deluxe Berg viola bow crafted by Michael Duff speaks clearly under
incredible pressure and scrutiny. It is resilient and reliable for playing
excerpts of every style, every bow stroke, every dynamic – natural and
unnatural. It responds clearly and does everything I want it to do. In
passionate orchestral solos such as. Ginastera and Kodaly, I am very satisfied
with the immense power of the bow that allows me to dig into the string all the
way to the tip. It can withstand the abuse of even the most vulgar playing and
permits an enormous range of sound: a quality necessary for exaggerating
everything for the sake of leading an orchestral section. The bow also allows me
to achieve the other extreme of playing incredibly, even unnaturally softly (if
only for the sake of demonstrating that capability) without losing clarity: a
characteristic that many Pernambuco bows at three times the price wouldn't be
able to perform."