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Yahoo Bid Home Appliances, Audio & Video, Camera Audio Equipment Speakers General Fostex
長岡鉄男氏考案『BOSE/901コピー・音場スピーカー』12cm×9 21㎜厚ラワン無垢古材使用 51Lバスレフ 5Ω デュアルバナナプラグ対応
        

インシュレーターは仮置きです。

左半分。W1255DとW1255B

右側。W1255BとW1255D

左よりW1255B、W1255D、W1255A。

W1244A

  • Product Quantity
    : 1
  • Starting Bid
    :18,000円
  • Highest Bidder
    : くやしんじ / Rating:3
  • Listing Date
    :2026年02月01日 21時52分
  • Bidding closes on
    :2026年02月08日 21時52分
  • Auction Number
    :c1212381585
  • 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. It is possible that the product can only be picked up by yourself, and the self-pickup fee is quite high, please check the page to confirm
  2. ※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『オーディオ日曜大工 4』に載っていた音場スピーカーを、ボーズの901に合わせるように、ユニット9発使って作ってみました。


詳しくはこちら↓

https://audio-heritage.jp/BOSE/speaker/901.html


何でも木材は、伐採から200年経った頃に硬度が最強になり、それから徐々に軟化していき、1500年経つと伐採時の硬度に戻るそうです。100年以上に住宅が取り壊されるとの噂が流れると、世界中がら大勢のヴァイオリン製作者が駆けつける事も有るようです。


今回、裏バッフルに使った21mm厚のラワン無垢材は、昭和40年代に建てられた住宅の棚板として使われていたもので、200年とはいかずとも60年は優に経ってます。虫食い&角欠けなども無く、確かに固く、叩くといい音がします。他の面は12mm厚の杉無垢材で覆い、内容量は51リットルになりました。


全ての12cmウーファーはオンキョー製W1255D&W1255A&W1255B&W1244A。コーン紙は特殊加工の紙製、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。マグネット部は径95mm厚さ38mmの超弩級巨大防磁型、インピーダンス5Ω、最大入力は25W、ユニットの違いはコーン紙の色だけです!


接続は3個づつシリーズ接続し、それぞれをパラレル接続して、システムインピーダンスは5Ωです。


内部配線はオーディオテクニカのOFCケーブルAT563Sなどで繋ぎ、ターミナルはデュアルバナナプラグ対応で金メッキ仕上げです。吸音材は2面のみです。


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のロングトーンは、かなりの迫力で鳴らしてくれました!前々作のオンキョー12cm×9個と同等です。


本領発揮はやはりオーケストラ!音場の広がりは見事で、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。ツィーターはついてませんが、特に必要性は感じません。それでももっとキラキラ感が欲しい方は、出品中の無指向性ツィーター・システムを使って下さい。


外観は透明ニス仕上げでで概ねキレイです。


インシュレーターは厚さ15mm。これを厚くするとバスレフ効果が高まり、薄くすると密閉式に近くなります。見た目は悪くなりますが、上下逆にして台の上に乗せて聴くのがベストでした。


重さ14.3kg、サイズは63×33×40cmです。


発送は180サイズになります。東京都、神奈川県、静岡県、山梨県、南信(松本以南)、愛知県三河地域の方は、手渡し&直接お届けの方が安価くなります。


2026年、ガソリン税率が下がって、直接配達が20%オフになりました!!!

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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:
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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.
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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『BOSE/901コピー・音場スピーカー』12cm×9 21㎜厚ラワン無垢古材使用 51Lバスレフ 5Ω デュアルバナナプラグ対応
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