Products Line Up

Audio Board
Speaker Stand
Speaker Cable
Inter Connect Cable
Balanced Cable
Digital Cable
Power Cable
Room Tuning
Insulator "D-PROP" (patent acquired)

To be the new standard of insulator.

D-PROP Cross-section

D-PROP extend


Left : D-PROP extend
Right : D-PROP

D-PROP mini

This is the PROP-style insulator that has the integral structure of spike and spike receptacles.
What is the surprising vibration controlling effect of D-PROP?!
With unique “Double spike receptacles and Liquid containment”, it will dramatically enhance the quality.

Among many insulators, the D-PROP Series are particularly unique.
Typically, spike and receptacle (cup) are separated and need to be carefully installed. The D-PROP Series of KRYNA is completely different. As the figure shows, the D-PROP has the simple PROP-style and has an integrated structure with high precision.

Based on a proprietary technology “Vibration Control Device” designed by Prof. Kiminobu Nishimura (Kinki University, Faculty of Engineering, Department of Mechanical Engineering) and Ryukei Ina (KRYNA President and CEO), the D-PROP was developed. It has the mechanic diode structure that applies the characteristics of spike that transmits vibration one-sidedly. It also has double spike structure that has two spikes in the brass container filled with special liquid, resulting in a dramatic improvement in insulation. It is especially effective in controlling micro-vibrations and harmonic distortion that affect the sound.


Internal vibration distorts original musical signals in the equipment such as disk players. In order to reduce the distortion, insulator is used. However, conventional single use of spike is not perfect, as there remain issues such as small vibrations that cannot be removed completely, returning of vibration from outside and sound of spike itself at the connecting points.
Use of two spikes was materialized without sacrificing user-friendliness and stability. The double spikes and liquid containment structure of the D-PROP makes it possible to control overwhelming levels of vibration, that was not possible with the conventional one spike structure.

Excellence of the D-PROP,
Proved by Actual Data

The outstanding performance of the D-PROP is also backed up by the actually measured data. Here is an experiment with a speaker. There is a significant difference in harmonic vibration level depending on whether or not the D-PROP is used for the equipment. Since it can effectively control higher-order (second-, third- and forth-order) harmonic distortion, there is no hissing and other unwanted noises and sound coloration. The D-PROP helps reproduce the original, clear sound.

Its outstanding effect can be expected not only for disk players and amplifiers but also for visual devices.

The excellence of the D-PROP has been academically proved.

Although the D-PROP is spike-shaped, it does not catch the rack or anything and easy to keep the equipment stable. D-PROP series are amazing breakthrough with its high quality and ease of use! It is an ultimate product to optimize the performance of your equipment.

Optimize the Performance of your Equipment
through Combination with the C-PROP

Some audio equipment such as Preamp and MC Trans use faint signals and does not have vibration source such as power supply and rotating part. With such equipment, it is effective to shut the impact of vibration from outside. The C-PROP is effective for it.

Even for CD-player, by using appropriately placing the combination of the D-PROP under the source of vibration such as power and mechanical part and the C-PROP for signal part, you can enhance the performance of your equipment.

D-PROP's Marked Improvements in Sound Quality

Specific improvements in sound quality are as follows:

1) Clear, Penetrating Sound by Reducing Harmonic Distortion
Lower-register sounds are beautiful and pure sounds are reproduced with no hissing and other unwanted noises and sound coloration.

2) Clear Sound-Source Localization
Vocal and instrumental sound images are clear and their depth, height and direction are also vividly reproduced. You will feel as if the sound penetrated the speaker without any obstacle. It is exactly the reproduction of a three-dimensional sound field.

3) Accurate and Natural Reproduction of Sound Field
Its accurate stereophonic reproduction of sounds will give you the original recording atmosphere. Because of its excellent high-frequency response (control capacity), it can be used for high-specification formats such as SACD and DVD-Audio.


Wide Varieties of D-PROP Series

The D-PROP Series have two types: Extend model and Standard model.
Depending on the purpose, you can choose from two sizes.

The New Standard of Vibration Control: Standard Model

They are the origin of proprietary technology for double spike structure and liquid containment style. It is an essential item for the vibration control of pure audio equipment as well as visual device. It plays simple yet the most important role, namely, “release unnecessary vibration”.

Expert of Vibration Control: Extend Model
D-PROP extend,D-PROP mini extend

The D-PROP extend models has the same double spike structure but has stronger liquid containment capacity. It uses insulation solution, “Sticky”, that was born in the process of developing its sister model, the C-PROP.
We adjusted the components of “Sticky”, the sticky and “springy solution” that is effective to enhance absorption of vibration energy for the extended models and enhanced compatibility with the D-PROP insulator.

With integration of excellent vibration absorption capacity and insulation effect of double spikes, the extended models are suitable for people who want to go beyond the already acquired quietness and reproduce three-dimensional sound field that depicts width and depth in the clear sound field space.







Model DP-1 DP-3 DP-4
Dimension Diameter: 39mm Height: 32mm
Weight 268g/per unit
Load weight Up to 15kg per unit is recommended.


Model DPX-1 DPX-3 DPX-4
Dimension Diameter: 39mm Height: 32mm
Weight 268g/ per unit
Load weight Up to 15kg per unit is recommended.


Model DM-1 DM-3 DM-4
Dimension Diameter: 27mm Height: 22mm
Weight 90g/ per unit
Load weight Up to 15kg per unit is recommended.
* The recommended load weight for effective performance of D-PROP mini is about 7kg.


Model DMX-1 DMX-3 DMX-4
Dimension Diameter: 27mm Height: 22mm
Weight 90g/ per unit
Load weight Up to 15kg per unit is recommended.
* The recommended load weight for effective performance of D-PROP mini is about 7kg.

*Product Type, standard, design, price may change without advance notice
in order to improve the product, etc.

Support Information

Brochure Download(English)