CLIENT LETTERS OF REFERENCE

August, 2005

Hello, Ari,

I'm back from the long Fourth-of-July weekend helping my friend install your hammers in his six-foot Young Chang.  The extreme bass, and the high soprano upward, are going to need some combination of breaking in and maybe hardening to deliver a good sound.  But that much is unremarkable.  And my friend is a fair amateur technician, who will lovingly and competently attend to that business, I'm quite sure.

Also of minor import, but appropriate to mention, is that, as best we could ascertain it, your boring job tended toward slightly greater than 90 degrees, causing us to resort to reaming, etc., to ease them to 90 or maybe 89 degrees. What is remarkable is the overall effect of your hammers in that instrument. The old hammers were of the hard, crusty sort that one expects to find on any Asian piano, but these had had a lot of attention to reform them. I remember applying a hammer softening solution (mainly water and acetone, of course), and my friend had resorted to a steaming technique I described to him. And over the years, my friend had needled the heck out of them. I remember that piano having an inoffensive, utilitarian tone.

Does one dare expect better from a middle-sized Young Chang? In contemplating your hammers in that Korean piano, I was prepared for the possibility that a great incompatibility would emerge (while figuring that, in the worst-case scenario, we could recover the "classic" Young Chang sound just by lacquering them to death). But I always thought your hammers would work well in an Asian piano, and had empirically expected what I thought would be about a 50% tonal improvement.

What we ended up struck me as maybe a 200% tonal improvement. That Young Chang, for the first time, revealed a soul. It became the temptress in the apartment, seducing us pianists again and again to come and explore. In short, it was the most dramatic improvement in piano tone I have ever witnessed. Ari, I do rate you a friend, but I hope it has always been apparent to you that personal loyalty has nothing to do with my reliance on your hammers. And you're always changing your ideas, and getting excited about new twists, etc., etc., which I have always greeted with scientific skepticism. It almost rubs me wrong to gush, but you have again shown that your hammers are absolutely, positively, and uniquely, the best available.

Again, I'll say that I do not understand why you don't have a stranglehold on the high end of the rebuilding business, and why you have not engendered serious competition. And I don't understand why so many piano manufacturers, and so many technicians, rely on those hard, crusty hammers, including whatever Renner has been putting out of late.

I'm finally ready to adopt the statement of another customer of yours from several years ago, to the effect that a good piano starts with a set of Isaac hammers. I can't imagine any other hammers I have ever worked with producing such a dramatic result in that Young Chang. I don't think my tastes the least bit eccentric, nor do I suppose that it takes some great sophistication to appreciate the tonal difference between good and not-so-good hammers.

Still, it seems as if having your hammers in my arsenal has been the secret weapon that allowed me to get results from a piano that no competitor of mine could approach. A technician using hard, mass-produced hammers no doubt enjoys the convenience of having a more symmetrical and uniform product in his hands to work with, and of having a fairly brilliant tone at the start. But such a technician who ends his inquiry there is selling himself, and his customers, short.

And any who has had a fair exposure to your product yet continues to run to the familiar Japanese or German sources for hammers is a damned fool. Again, I am uncomfortable gushing. But I strongly believe in giving credit where credit is due, and there is no way for me to do so in this instance without gushing aplenty. Your hammers worked a near miracle in that Young Chang! My friend, a poor, freelance musician, spent about his last dollar acquiring the parts and covering my expenses for the weekend, and he now feels richly rewarded.

If you ever decide to retire, please give me sufficient warning that I can buy several sets of unbored hammers for my archives. 

Good health to you, my friend!
Steve Manley

 

June, 2000

     Isaac bass strings are consistently better than any strings I've been able to get from any other source.  They have a good balance of overtones and can be made to growl if you want them to.  In addition, they fit the pianos better than any other strings because every set is made from a paper pattern taken straight from the piano in question.  These strings have the ability to speak out into a large hall in ways that other strings simply don't do.  They consistently make my rebuilt pianos sound larger than I and my customers expected them to.  When I use Isaac bass strings and hammers in conjunction with my new physically crowned sound boards, the vibrancy of the tone is phenomenal.  The pianos seem to come literally to life.  The sound is just like a living presence in the room.

     Cadenza hammers are another milestone in the history of piano making.  These hammers are more stable than any other hammer I've worked with.  They come to me right out of the box with the exact correct tonal spectrum needed for expressive piano performances.  If I need a brighter tone to meet the needs of a particular piano, Cadenza hammers are a dream to work with when hardening them.  No matter what you use to harden these hammers or how much of it you use, they retain that same tonal spectrum just at a brighter level.  You still get a warmer subtle sound at pianissimo playing that grows in intensity and increases in its high overtone excitation as you increase to fortissimo.  When I do get the needle out it is simply for the purpose of touching up and evening out a few hammers or for adjusting a specific tonal character that is desired at one or more of the dynamic playing levels.

David Rodgers
Rodgers' Piano Rebuilding
North East, PA

 

January, 2000

Dear Ari,

As you know, the soundboard design we use in the pianos we remanufacture require a somewhat more resilient, or elastic, hammer than is commonly used today. We have found the hammers you make for us to be an excellent match for our pianos. They require only a minimum of voicing--just a bit of shoulder needling here and there, and, sometimes, a bit of hardening in the very high treble. About as good as can be expected, I think.

These hammers consistently give our pianos the "voice" we are looking for with an excellent dynamic range. They develop a nice, warm pianissimo, yet they still give a good, solid and powerful fortissimo.

All in all, a good hammer.

We also appreciate the care with which you wrap bass strings to our specifications without attempting to redesign them yourself. We have taken great care to design the stringing scales we specify for the pianos we remanufacture and their performance depends on strings wrapped accurately to these scales. Beyond that, much of our work is experimental and developmental in nature and we depend on getting strings wrapped precisely as we have specified. Your strings consistently have exactly the core and wrap sizes and diameters we have requested. Your prompt and courteous service is greatly appreciated.

Regards,

Delwin D Fandrich
Larry E Graddy

 
November, 1999

I strongly recommend the Isaac piano hammer.  I have used Ari's hammers in all my rebuilding projects since 1985.  I love the range of color--from the sweetest softs to the fullest louds--with all the gradations in between.  My customer's all agree!

I also strongly recommend the Isaac bass strings.  They provide a rich fullness of the fundamentals with a pleasing mix of higher partials.

I appreciate Ari's willingness to strive for improvement in his scales, always trying to  get the breaks just right, and the power smooth throughout.

R.  Barrett
Piano Rebuilder
Ithaca, New York

The Best In Parts & Accessories for
Your Piano

Ari Isaac
(416) 229-2096

e-mail:
isaacpiano@sympatico.ca 

Hammers
Customized

Bass Strings
Customized

All content ©2004
Last updated August, 2005
Site design ©Teagle. Web Hosting: PinServices Ltd.