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Yahoo Bid Home Appliances, Audio & Video, Camera Audio Equipment Speakers General Fostex
長岡鉄男氏考案『マトリックス・スピーカーMⅩ‐4』準無指向性 10cm×3&8cm×3&20cm ヤマハNS‐C120流用 ダブル・バスレフ
        

接続手本

  • Product Quantity
    : 1
  • Starting Bid
    :3,800円
  • Highest Bidder
    : nak******** / Rating:41
  • Listing Date
    :2026年02月22日 21時42分
  • Bidding closes on
    :2026年03月01日 21時38分
  • Auction Number
    :k1220555001
  • Condition
    :Damaged and stained (specify in description)
  • 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. ※Please confirm whether it is animal fur. Animal fur products are in conflict with the Washington Treaty and cannot be shipped internationally.

長岡鉄男氏の『世界でただひとつ自分だけの手作りスピーカーをつくる』に載っていたマトリックス・スピーカーを、ヤマハのセンタースピーカーのエンクロージャーを流用して、無指向性も取り入れて作ってみました。以前出品していたMX‐2の発展的改造品になります。


正面左右の10cmフルレンジはSG-D70から取り外したケンウッド製。コーン紙は紙製、センターキャップは樹脂製、エッジは布製で劣化の心配はありません。マグネットは径70mm厚さ10mmと径50mm厚さ8mmのダブル・フェライト・マグネット、インピーダンス6Ω、最大入力は20Wです。


左右のハードドーム・ツィーターはEASTECH製。ダイヤフラムは樹脂製、マグネットは径40mm厚さ6mmと径32mm厚さ6mmのダブル・フェライト・マグネット、インピーダンス6Ω、最大入力5Wです。


正面中央の10cmウーファーはSB‐PM57から取り外したパナソニック製。コーン紙は樹脂製、センターキャップは布製、エッジはゴム製ですが劣化の兆候はありません。マグネットは径60mm厚さ10mmと径50mm厚さ8mmのダブル・フェライト・マグネット、インピーダンス6Ω。最大入力は不明です。


背面左右の8cmフルレンジはヤマハ製XT413AO。コーン紙は紙製、センターキャップは樹脂製、エッジは布製で劣化の心配はありません。マグネット部は径62mm厚さ25mmの防磁型、インピーダンス6Ω、最大入力は不明です。


背面中央の8cmフルレンジはSC‐A11Rから取り外したDENON製。コーン紙は紙製、センターキャップは布製、エッジは布製で劣化の心配はありません。マグネット部は径58mm厚さ24mmの防磁型、インピーダンスは6Ω、最大入力は40Wです。


前後ユニット同士をパラレル接続してます。 


上面のソフトドーム・ツィーターはヤマハ製JA0585。ダイヤフラムは布製、マグネット部は径84mm厚さ28mmの超巨大防磁型、インピーダンス8Ω、3個のツィーターはマトリックス接続し、2.2μFを挟んで、クロスオーバー周波数は3.6kHzです。


下部のシステムはオンキョーのFR‐12ASのエンクロージャーで20リットルのバスレフ。20cmウーファーはダイヤトーンのPW2025CMA、コーン紙は紙製、センターキャップも紙製、エッジも布製で劣化の心配はありません。マグネット部は径80mm厚さ25mmの防磁型、インピーダンス8Ω、最大入力は25Wです。センターウーファー出力が可能な方は、単独で使えるよう接続は外付けターミナルにしました。 


試聴では、ペダルトーンで埋め尽くされているJ.S.バッハのペダル練習曲BWV598(手持のテストCD;トン・コープマン:1734年製ミュラー・オルガン;アムステルダム;最低音36Hz)を、見事なバランスで鳴らしました。この曲は勿論足鍵盤の練習用でもありますが、当時最高のオルガン・コンサルタントでもあったバッハが、すべてのパイプがちゃんと鳴っているかどうかのチェックをするための曲でもあり、スピーカーにとっては、低域に変なピークやディップがないかどうかのテストとしても使える便利な曲です。もちろん変なピークやディップはありません。


本格的試聴では、J.S.バッハの前奏曲とフーガハ短調BWV546(手持の最強テストCD;トン・コープマン:ミュラー製作オルガン1734;最低音32Hz)の最初のCのロングトーンを、そこそこの音量でもしっかり鳴らしました。MX‐2よりもしっかり低音を鳴らします。


本領発揮はやはりオーケストラ!無指向性の音場の広がりは見事で、眼を閉じれば左右にスピーカーが有る様に錯覚します。フルトヴェングラーやクレメンス・クラウス等、’50年代のモノラル録音では、特に威力を発揮します。幅が48cmと広く、マトリックス効果が左右に広がります。


長岡氏の注意書きに、サンスイの10万円クラスの中級アンプや、超高級アンプなどにある『バランス式』と呼ばれるアンプには使えないようです。アンプに被害が及ぶと言われています。


 外観は、ハガレが目立った黒いシートを取り去って概ねキレイになりました。サランネットも無事です。


 重さ13.1kg、サイズは48×104×18cmです。発送は3分割して行います。

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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
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.my 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: 長岡鉄男氏考案『マトリックス・スピーカーMⅩ‐4』準無指向性 10cm×3&8cm×3&20cm ヤマハNS‐C120流用 ダブル・バスレフ
    Notes:
    Customer service hours:
    • Monday to Friday 10:00-18:00
    Customer service hotline:
    Customer Service Email: service@letao.my