Alloy Pro Series
ANNOUNCEMENT FROM GPI
Due to supply chain difficulties and rapidly increasing costs of materials, GPI has decided to discontinue making our RIMS® and Dynamount™ products. What we have left in stock is available on the Order page for each product. Any sizes out of stock will no longer be available. In certain cases we may have "factory seconds/slightly blemished" sizes available, in which case we will offer them for sale for a small discount in a separate section below. Thank you to everyone who has supported RIMS® and Dynamount™ over the years. Please note that we will continue to sell our other products available on this website.
Due to supply chain difficulties and rapidly increasing costs of materials, GPI has decided to discontinue making our RIMS® and Dynamount™ products. What we have left in stock is available on the Order page for each product. Any sizes out of stock will no longer be available. In certain cases we may have "factory seconds/slightly blemished" sizes available, in which case we will offer them for sale for a small discount in a separate section below. Thank you to everyone who has supported RIMS® and Dynamount™ over the years. Please note that we will continue to sell our other products available on this website.
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Since the invention of RIMS® (Resonance Isolation Mounting System) in 1980, other mounting systems claiming to do the same thing have flooded the drum world. RIMS® is still the only one that truly isolates a drum. Here is why:
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"With my new RIMS® mounts in place, every drum sings like never before.
My 10 inch and 12 inch in particular have opened up to the point
that it's hard to suppress a smile when I hit them."
-Dyfrig Morris
Center of Gravity: 180º
The basic principle of RIMS® is that the drum is held at two points dividing the center of gravity in half. This takes all stress off the drum shell and distributes the vertical weight evenly when suspended. To test the common sense of this idea, pick up a drum with your hands. To hold it upright, you naturally place your hands at points 180º apart. Picking it up with your hands at only one point and trying to raise the drum to a playable angle is almost impossible since the drum is off its center of gravity. The lopsided weight is making the drum heavier to hold upright creating a twisting torque on the shell. Even if you can hold it up this way, imagine someone now hitting it with a drumstick. The stress on the drum is enormous, and when mounted this way, can very easily cause shell warping issues, especially in high humidity. Most mounts that have been developed since RIMS® do not take into account this extremely important element of basic physics.
The basic principle of RIMS® is that the drum is held at two points dividing the center of gravity in half. This takes all stress off the drum shell and distributes the vertical weight evenly when suspended. To test the common sense of this idea, pick up a drum with your hands. To hold it upright, you naturally place your hands at points 180º apart. Picking it up with your hands at only one point and trying to raise the drum to a playable angle is almost impossible since the drum is off its center of gravity. The lopsided weight is making the drum heavier to hold upright creating a twisting torque on the shell. Even if you can hold it up this way, imagine someone now hitting it with a drumstick. The stress on the drum is enormous, and when mounted this way, can very easily cause shell warping issues, especially in high humidity. Most mounts that have been developed since RIMS® do not take into account this extremely important element of basic physics.
"I just wanted to let you know how happy I am with your RIMS® on my Mapex toms.
The drums just opened right up. Of course, this was a foregone conclusion,
I've been using your product since 1979.
Rogers, Gretsch and now Mapex. Success rate 100%."
-Terry O'Brien
Formed to Perfection
Each RIMS® mount is rolled by hand and checked to make sure the diameter is perfect. It is vital that a RIMS® mount fits the drum just right, thus eliminating any lateral forces on the drum when mounted. Mass produced copies or 'RIMS® style' mounts that are on the market are not rolled to the exact diameter of the drum, resulting in more inward or outward stress on the tension rods, lugs, and shell of the drum. You may see the tension rods literally ripping through the rubber grommets of these mounts because the force is so strong. The result is loss of resonance and a drum shell that can be distorted out of round.
Each RIMS® mount is rolled by hand and checked to make sure the diameter is perfect. It is vital that a RIMS® mount fits the drum just right, thus eliminating any lateral forces on the drum when mounted. Mass produced copies or 'RIMS® style' mounts that are on the market are not rolled to the exact diameter of the drum, resulting in more inward or outward stress on the tension rods, lugs, and shell of the drum. You may see the tension rods literally ripping through the rubber grommets of these mounts because the force is so strong. The result is loss of resonance and a drum shell that can be distorted out of round.
"Simply put, the 12 inch drum now sounds astonishing.
It not only has more sustain, but is deeper and fuller, and the strange overtones are gone.
In fact, the 10 inch tom which had sounded quite open compared to the 12 inch
now sounds choked by comparison to the 12 inch with the R.I.M.S.® mount."
-Chip Hammond
Aluminum Alloy
When early RIMS® mounts were first made out of steel, they worked for many drummers. But we would still hear from those who were confused about why certain drums still sounded choked. After doing research, we discovered some amazing things about the properties of the material. When steel is chrome plated, it hardens the material and takes on a tonal pitch. So when it is placed on a drum that is tuned within a certain range, those two pitches react to one another and will cancel each other out, resulting in a drum's tone being choked. Since aluminum works as a better isolator, and we no longer chrome plate the material, there is nothing to work against the drums resonating tones. The added bonus is that aluminum is one third of the weight of steel, so our mounts are the lightest way to achieve the most effective result.
When early RIMS® mounts were first made out of steel, they worked for many drummers. But we would still hear from those who were confused about why certain drums still sounded choked. After doing research, we discovered some amazing things about the properties of the material. When steel is chrome plated, it hardens the material and takes on a tonal pitch. So when it is placed on a drum that is tuned within a certain range, those two pitches react to one another and will cancel each other out, resulting in a drum's tone being choked. Since aluminum works as a better isolator, and we no longer chrome plate the material, there is nothing to work against the drums resonating tones. The added bonus is that aluminum is one third of the weight of steel, so our mounts are the lightest way to achieve the most effective result.
"I am very pleased with my new RIMS®. They look and sound fantastic.
I can't believe how light they are and still feel solid when played.
They have outperformed all other systems I have tried.
My Luddys never sounded this pure and good before."
-Steve Kesler
GPI's Adjustable Flange
We created the adjustable flange so that the point where the mount connects to the drum's tension rod can be customized and placed to fit any drum. We found particularly in vintage drums that lugs are not always evenly spaced, so allowing a drummer to align the flanges accurately quickly solved this problem. It is just one more step in creating the perfect fit for every individual drum.
We created the adjustable flange so that the point where the mount connects to the drum's tension rod can be customized and placed to fit any drum. We found particularly in vintage drums that lugs are not always evenly spaced, so allowing a drummer to align the flanges accurately quickly solved this problem. It is just one more step in creating the perfect fit for every individual drum.
"I have tried for years to configure the Optimount system on my kit to no avail.
Literally dozens of hours tweaking that produced minute improvements.
RIMS® DRASTICALLY improved the overall sound of my kit. The toms sing out like never before. Dramatically improved sustain, resonance and overall body and clarity of sound.
I am now FINALLY hearing 100% of the shell.
Also, after tuning, the toms are producing much more low end and midrange,
and are sounding 'full spectrum' and fully open for the first time.
Virtually ZERO over ring as well."
-Brian Burns
Take the 'Two Minute RIMS® Test'
We encourage everyone to test various drum mounts to hear how well they work and make sure they are getting the most out of their drums. Simply tune your drum and strike it as it is normally mounted. Then take the drum off the stand and strike the drum while holding it with your thumb and forefinger. If the drum sounds fuller and deeper with more sustain when you hold the drum in your fingers, then your current mount is not isolating and your instrument is not performing to its greatest potential. A drum suspended on a RIMS® mount will provide the same fullness of sound that you hear when your drum is struck off the stand.
We encourage everyone to test various drum mounts to hear how well they work and make sure they are getting the most out of their drums. Simply tune your drum and strike it as it is normally mounted. Then take the drum off the stand and strike the drum while holding it with your thumb and forefinger. If the drum sounds fuller and deeper with more sustain when you hold the drum in your fingers, then your current mount is not isolating and your instrument is not performing to its greatest potential. A drum suspended on a RIMS® mount will provide the same fullness of sound that you hear when your drum is struck off the stand.
A Drum Is Only As Good As Its Ability To Resonate
It should be noted that a drum's natural resonance is affected by many factors before it is ever mounted; such as bearing edges, drum heads, out of roundness, etc. If you strike your drum off the mounting stand and feel it is not resonating fully, it could very well be for one of these reasons. These factors are common in old and new drums alike, and we encourage musicians to listen to their instrument and become aware of the factors that create the sound of their drums.
It should be noted that a drum's natural resonance is affected by many factors before it is ever mounted; such as bearing edges, drum heads, out of roundness, etc. If you strike your drum off the mounting stand and feel it is not resonating fully, it could very well be for one of these reasons. These factors are common in old and new drums alike, and we encourage musicians to listen to their instrument and become aware of the factors that create the sound of their drums.
RIMS® Assembly Video
RIMS® (Resonance Isolation Mounting System) is a registered trademark of Gauger Percussion Inc. and is solely owned by GPI. It is not under license to any other company or individual at this time. It is a violation of trademark law to use any registered trademark as a generic description or identifier of other systems that may be copies or are similar to our original product. The RIMS® trademark is registered in several countries around the world and is protected by the trademark laws in each country respectively.