Innovative ideas and technologies allow for dramatic sound quality enhancement.

Professional package "6 Series" that maximizes the speakers original capabilities
Easy to install by anyone. Maximize your speaker ability with only two items and dramatically improve sound quality.
The professional package of high-quality audio inner baffles includes a hybrid metal die cast inner baffle and wave shape sound isolation cushion. Only two items increase the strength of the door plate and reduce resonance near the mounting area and reduce reverse phase interference from the back of the speaker. It improves the clear and voluminous sound and dramatically improves the sound quality of the car interior.
Innovative technology and idea help maximize speaker performance
We use innovative technologies such as "Hybrid Metal Diecast" and "Wave Shape Sound Isolation Cushion". Maximize your speakers original performance and make it easy and reliable for significant sound enhancement.
Why are not only strong and heavy? "Hybrid Metal Die Cast Inner Baffle" that thoroughly reduces unnecessary resonance
In general, the baffle plate material that supports the speaker unit is believed to be strong (high rigidity) and heavy (high specific gravity). By combining aluminum, iron, and brass, we developed a "hybrid metal die-cast inner baffle" with high rigidity and high specific gravity that suppresses the resonance of metal inherent resonance. By reducing unnecessary vibrations in the speaker unit, the strength of the installation location is increased dramatically for low-frequency response and toned low-frequency playback. The matte black dampening paint has been adopted with a "high rigidity aluminum die-cast base" to achieve a texture unique to the top model. The steel anchor plate has a finer blasting process than ever before, making the surface of the speaker frame and the inner baffle base more contributing to increased rigidity. The bottom is made of high density memory foam and highly functional sealant. Increases adhesion to door iron plates and eliminates distortion and resonance UD-K625/K629 does not use brass, and is a combination of aluminum and iron.
Vibration paint has been adopted to dramatically improve the sound quality.
By adopting anti-vibration paint, sound pressure levels are reduced by 43.9% and resonance time up to 34.2% (compared to conventional versions). Significantly reduces unwanted resonance sounds and increases sound quality.
About Wave Shape Sound Insulation Cushion:
It has excellent sound insulation and vibration absorption, and it effectively disperses the reflected sound waves produced within the sound-isolating cushion tube, and achieves a flat frequency character. By blocking the sound from the door trim, passing through service holes, etc., the reverse phase sound on the back of the speaker greatly improves frequency characteristics. In addition, the sound isolation cushion exterior and inner wave shape provide effective sound insulation and vibration absorption, while efficiently dispersing reflected sound waves within the sound-isolating cushion tube, reducing medium and low loss, resulting in clear music playback around medium and low range.
Easy for anyone to install with only 2 parts
High Quality Sound Quality Inner Baffle Professional Package includes 5 parts - Hybrid Metal Diecast Inner Baffle and Wave Shape Sound Isolating Cushion. Anyone can easily install it and it can greatly improve the sound environment in the car.
High quality design with functionality unique to the top model.
Combined with a highly rigid die-cast aluminum base with a matte black dampening paint and a classy copper colored steel anchor plate for a superior level of design and functionality. Simple yet high texture and rigidity.

From the Manufacturer

Professional package "6 Series" that brings out the original power of the speaker.

Easy to install by anyone.Enhance your speaker with only two items and dramatically improve sound quality.

The professional package of high-quality audio inner baffles includes a hybrid metal die cast inner baffle and wave shape sound isolation cushion. Only two items increase the strength of the door plate and reduce resonance near the mounting area and reduce reverse phase interference from the back of the speaker. It improves the clear and voluminous sound and dramatically improves the sound quality of the car interior.

Why are not only strong and heavy?"Hybrid Metal Die Cast Inner Baffle" that thoroughly reduces unnecessary resonance

In general, the baffle plate material that supports the speaker unit is believed to be strong (high rigidity) and heavy (high specific gravity). By combining aluminum, iron, and brass, we developed a "hybrid metal die-cast inner baffle" with high rigidity and high specific gravity that suppresses the resonance of metal inherent vibration. By reducing unnecessary vibrations of the speaker unit, the strength of the installation location is increased, the low frequency response is dramatically improved and tightened low frequency playback. The matte black dampening paint has been adopted with a "high rigidity aluminum die-cast base" to achieve a texture unique to the top model. The steel anchor plate has been subjected to a finer blasting process than ever before, making the surface of the speaker frame and the high-rigidity aluminum die-cast base more contributing to increased rigidity. The bottom is made of high density memory foam and highly functional sealant.Increases adhesion to door iron plates and eliminates distortion and resonance

UD-K625/K629 does not use brass, and is a combination of aluminum and iron.

Innovative technology and inspiration allow the speaker to perform as much as possible

We use innovative technologies such as "Hybrid Metal Diecast" and "Wave Shape Sound Isolation Cushion". The original performance of the speaker is as much as possible and makes it possible to achieve significant sound quality improvements easily and reliably.

Vibration acceleration comparison of inner baffles due to different material By creating a hybrid of aluminum and iron, the resonance is greatly suppressed.	Vibration acceleration comparison of inner baffle due to different material Superior vibration dampening properties compared to other materials.Low impact and fast confusion. Plywood inner baffle The decay is very beautiful, but the first impact is large, and it takes time to converge. Resin inner baffle Slow rise, and the sound remains inherent in the mid-range and clouds. Hybrid Metal Die-Cast Inner Baffle The high rigidity and high specific gravity make it ideal for inner baffles that have a small initial impact and a clean and quick conversion of the attenuation.	Vibration dampening paint increases sound quality By adopting anti-vibration paint, sound pressure level is 43.9% less than previous models.Provides significant suppression of unnecessary resonance sounds By adopting anti-vibration paint, the sound pressure level is reduced by 43.9% and the resonance time is reduced by 34.2% (compared to conventional versions). Significantly reduces unwanted resonance sounds and increases sound quality.	About Wave Shape Sound Insulation Cushion It has excellent sound insulation and vibration absorption, and it efficiently disperses the reflected sound waves produced within the sound-isolating cushion tube, and achieves a flat frequency character. By blocking the sound from the door trim, passing through service holes, etc., the reverse phase sound on the back of the speaker greatly improves frequency characteristics. In addition, the sound isolation cushion has a different wave shape on the outside and inside to ensure effective sound insulation and vibration absorption, and the sound waves produced within the sound-isolating cushion tube is efficiently dispersed and reduces the loss of mid-low ranges, resulting in clear music playback around the middle and low range.

Easy installation with just 2 parts.

There are only two parts of the "Hybrid Metal Diecast Inner Baffle" and "Wave Shape Sound Isolating Cushion".Easy to install and can greatly improve the sound environment in your car.

Finally attach a sound insulation cushion to the inner baffle that removes the original speaker.

High quality design with functionality unique to the top model.

Combined with a high rigidity aluminum die-cast base with a matte black dampening paint and an elegant copper colored steel anchor plate for a superior level of design and functionality.Simple yet high texture and rigidity.