The Cool Note process has been hailed as the greatest advancement for brass instruments in the last 50 years. By treating the instrument at sub-zero temperatures, inherent stresses within the structure of the brass called “residual stresses” are released. Brass instruments respond to this gentle process providing increased tonal quality, volume, and lower or higher register.

By treating the instrument at sub-zero temperatures, inherent stresses within the structure of the brass called “residual stresses” are released. This allows your instrument to play and sound the way it was designed to perform. Instruments are also reported as being easier to clean.


Pianos, guitars, cymbals, saxophones, trumpets, trombones, and any other horn or metal stringed instrument will likely benefit from our process. Not only will strings last longer, thus reducing time between replacement, but they will also stay in tune longer. That’s a major benefit for concert halls, auditoriums and anywhere else an instrument is heavily used. At large performances, staying in tune becomes mission critical when you’re performing in front of thousands of people. 300 Below’s cool note process ensures that each note you play consistently remains the note you were counting on hearing. Regardless of whether you’re spending hundreds of dollars or hundreds of thousands of dollars on your instruments, 300 Below will help you maximize your ROI and ensure maximum playability for years to come.

Stay In Tune Longer!

Spend Less Time Cleaning!

Hit Crisp Notes Every Time!

800-550-CRYO (2796)



After being treated with the cryogenic process, I immediately noticed a difference in the performance of the instrument. First of all, there was less resistance in the projection of the notes. Secondly, there was a fuller sound throughout the entire range of all registers of the saxophone. Altissmo notes responded as well as the lower register notes. The overall intonation was also greatly improved.

A sax friend of mine (with the exact same model of sax that I have) stopped by to try my cryogenically treated horn and liked it so much that he wanted to trade instruments. I have had three of my saxophones treated with the cryogenic process– all with wonderful results. Recently I recieved a new saxophone that I recently had treated and played it in the recording studio last night here in Pittsburgh. The musicians love the sound of my Tenor Sax. This time I also had my Peter Ponzol mouthpiece treated– I played it and compared it with an identical Ponzol mouthpiece that I have as a back up. I know that you guessed it: The cryogenic mouthpiece sounded better.

I have now sent all of my mouthpieces to be cryogenically treated. The process seems to make the new mouthpieces and horns sound as though they have been aged or played for many years. Professional saxophonists know the difference in sound of a brand new instrument versus one that has been played for many years. I am sold on the cryogenic process and highly recommend it to anyone that wishes to improve upon their sound, projection and articulation, all of which the cryogenic process enhances.

Calvin M. Stemley House of Soul Band Pittsburgh, PA

Cryogenically Tempered Trombone
Quote needs to be re-attributed. We will publish this again shortly. Brent A. Shires – French Horn Professor of Horn, Millikin University Millikin/Decatur Symphony Orchestra
Cryogenically Processed Tuba
We noticed the horns treated had a darker and rounder sound. The process expanded the registers (high, medium, and low), and made the horns freer blowing, along with improved pitch centering Scot Stewart – Director Madison Scouts – Madison, WI
Cryogenically Treated Trumpet
The richness of overtones made my trumpet seem larger than ever. Another improvement was the absence of “flat spots” over the range of the horn at all dynamic levels. A side benefit of the easier response was that I felt less fatigued after a show. My newly cryo’ed horn and mouthpiece is now capable of whispering like a kitten or barking like a big dog! Mark Curry – 24 kt Gold Plated Shilke S-32 Trumpet Performer Flamingo Hilton – Reno, Nevada Owner – Sound Sleeve Performance Products
Cryogenically Treated Trumpet Mute
A rounder more pleasant-resonant tone and the process mellowed by Bb and C. I liked the overall sensation of the trumpet and I wasn’t as tired at the end of rehearsal. Several people complemented me on my sound, especially the conductor! The valves feel even better and smoother than before. The double high G finally is focused on my Bb, before it didn’t seem to exist. Now I can play both my Bb and C trumpet without heavy caps, or tape to try to deaden it, yet it feels very resonant in my hand and to my ear. Ken Anistrum Principle Trumpet for the “New Philharmonic” Chicago, Illinois