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Yahoo Bid Home Appliances, Audio & Video, Camera Audio Equipment Other
【高純度アルミナ】 ファインセラミックス製 オーディオインシュレーター 特殊リング形状【6個セット品】
 
        

  • Product Quantity
    : 1
  • Starting Bid
    :3,000円
  • Highest Bidder
    : / Rating:
  • Listing Date
    :2026年01月25日 10時50分
  • Bidding closes on
    :2026年01月31日 20時46分
  • Auction Number
    :o1217200191
  • Condition
    :New product
  • Automatic Extension
    :Yes
  • Authentication
    :No
  • Early Closing
    :Yes
  • Can I return the product?
    :no
  • Description
  • Q&A ()
  • Cost Estimator
  • Problem Item Response Procedur
Notes
  1. Plug-in electrical appliances are only shipped by air (shipping by sea requires commodity inspection)
純度99.6%アルミナファインセラミックス(Al2O3)特殊リング形状インシュレーター

本製品は、純度99.6%の高純度アルミナ(Al2O3)を焼結した緻密質ファインセラミックスを用いたリング形状インシュレーターです。
アルミナはルビー・サファイアと同一の化学組成を持ち、ビッカース硬度・耐摩耗性・電気絶縁性・熱安定性において工業材料として極めて優れた特性を示します。


■材料特性(Material Properties)

● 高硬度・高弾性率

  • ビッカース硬度:ダイヤモンドに次ぐクラス

  • ヤング率:金属材料を大きく上回る高剛性

    これにより、外部振動のエネルギー吸収ではなく、伝達経路の安定化を重視した音響特性を実現します。

● 高密度・高結晶性

緻密な焼結構造により、内部損失が極めて小さく、素材固有の共振ピークが高周波側にシフトするため、中高域の解像度を損なわず、低域の過度な膨らみを抑制します。


● 優れた電気絶縁性

金属インシュレーターで発生し得る「機器底部からの電磁誘導ノイズ経路」を遮断し、アースループや筐体ノイズの影響を低減します。


■リング形状による振動工学的メリット

● 点接触に近い支持構造

リング形状は平面インシュレーターと異なり、面密着を避け、支持面積を最小化します。

これにより、

  • 不要な接触面共振の抑制

  • スパイク型に近い振動エネルギーの逃がし方

  • 機器の安定性との両立

が可能になります。


● 共振モードの分散

リング構造は、単一の平面支持に比べて固有振動モードが分散しやすく、局所的な共振ピークを抑制します。

結果として、

  • 中高域の明瞭度向上

  • 低域の立ち上がり改善

  • 箱鳴り感の低減

といった音響的メリットが得られます。


■音響特性への影響(Acoustic Behavior)

高純度アルミナの低内部損失と高剛性により、音の立ち上がり・減衰特性が改善され、特に以下の傾向が確認されています。

  • 中高域:微細情報の分解能向上、輪郭の明瞭化

  • 低域:スピード感のあるタイトな再現

  • 全帯域:筐体共振の抑制によるSN感の向上

素材の“色付け”が極めて少ないため、機器本来の音を忠実に引き出す方向性のインシュレーターです。


■電磁ノイズ環境での優位性

アルミナは高い誘電率と絶縁抵抗を持つため、金属インシュレーターで発生し得る

  • 微弱な電流経路の形成

  • 筐体底部での電磁結合

  • DAW/DTM環境でのノイズフロア上昇

といった問題の回避に有効です。

モニター環境の純度を重視する音楽制作用途にも適しています。


■注意事項(Technical Notes)

  • 表面には数mレベルの加工痕が残る場合がありますが、材質特性・性能に影響はありません。

  • 高硬度材料のため、落下衝撃や局所的な集中荷重により欠けが発生する可能性があります。

  • 金属と直接擦過した場合、金属側が摩耗し、黒色の金属粉が付着することがあります(アルミナ側の異常ではありません)。

■セット内容

  • アルミナリングインシュレーター × 6個

詳細寸法は画像の品質証明書をご確認ください。


■最後に

金属製・木製・ゴム製・樹脂製インシュレーターでは満足できなかった方、あるいはさらなる音質向上を求めている方に、この高純度アルミナリングがどれほどの変化をもたらすのか、ぜひ一度お試しください。
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Product Price JPY
Japanese Consumption Tax(10%) JPY

A 10% consumption tax is applied to goods and services in Japan. The price may include the tax or it may be added separately. Please check the price details when ordering.

Note: This is a domestic sales tax applied within Japan.

Japan Local Shipping Fee JPY Japan Local Shipping Fee Reference
Product Weight KG The maximum weight limit is 30 kg
International Shipping Methods
Singapore Package Import: Customs and Tax Policies
Proxy bidding and purchasing services are becoming increasingly convenient. However, overseas shopping carries certain risks and issues. To reduce these risks and enhance shopping safety, please be sure to read the following information:

1. International Shipping

   Air Freight: If the item status is not confirmed within two days after the arrival notice, any customer complaints cannot be addressed with the seller.

2. After Receiving the Product

Please confirm and inspect the product as soon as possible to ensure that the product specifications, quantity, accessories, and description are correct

If, unfortunately, there are any issues, you can refer to the following examples on how to report related product problems:
1. Example of missing product information
2. Example of product not matching provided information
3. Example of damaged product information

Important Notes: 1. If the seller is unwilling to ship overseas or is unaware that the product will be shipped overseas, the international shipping cost for returns or exchanges will need to be borne by the member. You may refer to the EMS e-Express fee inquiry from the post office. If it involves alcoholic beverages or items that affect flight safety, the post office cannot be used for shipment, and only DHL can be used to ship back to Japan.
2. During the product complaint handling period, please retain the complete outer packaging of the product (including the shipping label information), and refrain from attempting any repairs or altering the original condition. Any modifications may result in the inability to process the case.

3. After Inspecting the Product

After receiving and inspecting the item, if you have any questions, it is recommended to contact Letao within 2 hours. Here are some reminders:

1. Please do not unpack, use or repair the received item yourself, and be sure to keep the original packaging to facilitate subsequent handling of related matters, so as to avoid changes to the item that may cause the seller to be unwilling to process.

2. You can call customer service, and the customer service will leave a message for you as below. Please provide the following information:
"Hello, we will first help you establish a complaint case for Product ID: _______ .But we need you to 2-3 clear photos of the product issue, including photos of the product problem, product packaging, shipping details slip, and outer box. Send them to service@letao-holdings.com and inform us of your desired resolution (failing to provide this may result in an inability to process subsequent matters). After sending the email, notify us in the customer service message. We will confirm with the seller as soon as possible. and if there are any related questions, we will contact you through the customer service message. Thank you for your cooperation."

Please provide:
1. "Product ID"
2. Photo of the "Delivery Note" (if any)
3. Photos of the outer box (including inner and outer packaging)
4. Photos of the product (Please include relevant descriptions to help us confirm with the seller)

Important Notes:
1. Do not include foreign text or other products in the background of the image.
2. Please keep the complete product packaging (including the shipping label information), and refrain from repairing or altering the original condition on your own, as any changes may result in the case being unable to be processed.
3. Please provide the relevant information within 48 hours to avoid missing the golden hour for reflection and causing situations that cannot be handled.
4. Due to 99% of Japanese sellers being unwilling or unaware of shipping goods overseas, if a seller is willing to handle the issue, the goods must be sent back to Japan, and the international shipping costs incurred must be borne by the member. Letao will use postal EMS international express to send the goods back to Japan.
5. As the goods are purchased from overseas, it may take approximately one to two weeks to complete the relevant processing procedures when issues arise with the goods. Please be reminded that you can inquire about the approximate cost through the EMS service at the post office.

4. FAQ

1. Issue of Authenticity: If antique or branded goods are found to be counterfeit upon receipt, clear photos showing the differences between the genuine product and the imitation must be provided as evidence. If unable to provide relevant proof, assistance can be sought to find a third-party reputable organization for a premium authentication service .
2. Leaking Iron Teapot: If an antique iron teapot is leaking, please take clear photos of the leaking area and provide them.
3. Transport Damage: If the goods are damaged during international shipping (to the pickup point), you need to provide photos of the outer packaging of the parcel and clear photos of the damaged goods' outer packaging.

※ Note: Photos provided to sellers should not contain any foreign-related information.
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    Product name: 【高純度アルミナ】 ファインセラミックス製 オーディオインシュレーター 特殊リング形状【6個セット品】
    Notes:
    Customer service hours:
    • Monday to Friday 10:00-18:00
    Customer service hotline:
    Customer Service Email: service@letao-holdings.com