The 15th acoustic test of our review has proved to be extremely fascinating and rich in unexpected resounding nuances. We met by the end of April on a nice afternoon at " Il torchio" art centre in PSG, head quarter of "Apostrofoeditore" publishing house, brilliantly run by Dante Fazzi editor and his wife Graziella Borgna, an artist. Apostroeditore publisher house is located in an ancient farm in the centre of the village where a linen press was active years ago; the farm has recently been completely restored by the couple ( work started in 2003 ) and it represents an ideal venue for promoting writers, painters, sculptors, musicians and all kind of artists through Errepiarte cultural association. Thanks to the kindness of our friend Dante and to Fausto Solci, a virtuoso cellist, we recorded the famous J.S. Bach Sarabanda piece by using four different bows. In the past we tracked the sound of instruments while in this new and well structured test we turned our attention to the acoustic changes offered by the strain of different bows. The Cremonese cellist used first an Eugene Sartory bow of 1920 which belongs to the Lucchi family, then 2 modern bows of Giovanni and Marta Lucchi and last a bows Bazine bow. We don't aim at making a chart but we want simply document what happened and offer hints of meditation that's why the test will be divided into 4 different parts in order to assure us the possibility of dwelling clearly on each bow. Maestro Fausto Solci usually plays a Muncher 1920 cello. Romedio Muncher's career as a violinmaker took off when he joined "Claudio Monteverde" artistic violinmaking "Officina". The "Officina" was founded by Aristide Cavalli around 1899, instruments based on the four fundamental models were build there: Stradivari, Ceruti, Tresenda and Guarneri. By that time Muncher had the possibility of making the perfect experience, afterwards he started up his own business by setting a workshop in his house at number 20 of via 11 Febbraio in Cremona and later at number 2 of via Gorizia. In this shop he used to build violins, violas, cellos, quartets following the classic method, he was a restorer of instruments as well. His production us of 2 thousand instruments more or less. According to some notable executers’ opinion, some of his works are noteworthy, we must above all highlight the cellos and all the instruments which appear in an amber colour varnish. Even if Romedio Muncher's instruments are built on Stradivari and Guarneri del Gesu' models, they are unique for their features. During the first recording Fausto Solci used the 1920 Sartory. From the very first notes the bow gave proof of its excellent qualities. Here is the musician's comment about it: "the Eugene Sartory bow has kept all its original auditory nerve, you immediately get that the material of which it is built is of good quality, it manages in " bringing out" a great number of harmonics, it springs with pleasure and reacts perfectly to every spur, it's in perfect condition, no doubt it is one of the best bows I have ever used!”, and here is its sound: