Excalibur Sound Deadening System™

Excalibur Sound Deadening System™ – Ultimate Noise and Vibration Suppression Kit

What's in the Box? – Complete Kit Contents

• Over-molded Rubberized Stirrup: A specially coated metal foot stirrup that prevents vibration and noise from transferring through the riser.
• Ex-Shox™ Dampeners: Robust dampeners mounted directly to the limbs that halt vibration the instant you fire.
• String Stars: Small but highly effective rubber stars that weave into the string to eliminate "string hum."
• R.A.V.S. Limb Silencers: Additional dampeners that attach to the limbs to clean up any residual after-shock.

Technical Specifications & Data

Purpose and Benefits of Sound Suppression

The primary purpose of this system is user comfort and stealth. Modern crossbows unleash incredible power, and while most of it goes into the arrow, some energy is always converted into unwanted vibration and sound. These vibrations strain your hands and your optics, and the noise can alert game. With the Sound Deadening System, your crossbow won't "bark"—it delivers energy to the arrow in a subdued manner. Your shot becomes more stable, kick is reduced, and you can better track your arrow's flight through the scope.

Did You Know? Sound Speed vs. Arrow Speed

Did you know that sound travels at approximately 343 metres per second, while even the fastest crossbows fire arrows at around 120 metres per second? Without proper dampening, the target will hear the shot long before the arrow arrives. This is why noise suppression is so critical—it gives you those precious fractions of a second that decide between a hit and a miss.

Care and Maintenance of Dampening Elements

To keep the rubber components from hardening or becoming brittle, keep them clean. After shooting in the rain, wipe them down with a dry cloth. If they get dusty, simply use lukewarm water. Never use oils or aggressive solvent-based cleaners, as these will degrade the rubber or change its properties. Periodically check that the Ex-Shox are still firmly attached and that the String Stars are not worn out from high-volume shooting.

What to Avoid

• Oil Lubrication: Any petroleum-based products will permanently damage the rubber.
• Mechanical Damage: When transporting your bow in a case, ensure the dampeners don't snag on sharp objects.
• Dry Firing: Even the best dampeners cannot protect a crossbow from a dry fire (firing without an arrow)—doing so will likely destroy the dampeners and damage the limbs.

Recommended Arrow Parameters for a Suppressed Bow

For the best results with this system, we recommend using arrows that help absorb energy through weight:

• Arrow Length: 16.5" or 18" (depending on your model)
• Shaft Material: High-modulus carbon for maximum strength
• Point Weight: 125–150 grains (heavier points further quiet the shot)
• Nock: Rhino Nock (aluminium flat nock for safe energy transfer)

Recommended Accessories

Your stealth setup pairs perfectly with R.E.D.S. string suppressors if your bow isn't already equipped with them. For string maintenance when using String Stars, use only high-quality string wax that doesn't leave sticky residues on the dampeners. For transport, we recommend the Tomb Case, which has plenty of room for a fully kitted-out suppressed crossbow.