【オーディオ史に刻まれる、二度と出逢えない「唯一無二」の個体】 本機のような**「メーカー開発部直系の基準機(チャンピオン機)」が、これほど完璧なコンディションで市場に現れることは、過去のオークションや委託販売の歴史を遡っても例がありません。** 通常、こうしたリファレンス機はメーカー内部で廃棄、あるいは部品取りとして生涯を終える運命にあります。シリアル00025という若番、そして背面刻印「SAMPLE UNIT ONLY !」が証明するその血統は、まさに**「世界に一台」**と言っても過言ではない歴史的資料です(画像1参照)。 単なる中古品ではなく、A&Dの設計思想そのものを所有するという、最初で最後の機会になるかと思います。
Yahoo! Auction Final Description (English) [MUSEUM-GRADE / SERIAL NO. 00025] A&D GX-Z9100EV "CHAMPION UNIT" Exclusive Ex-AKAI R&D Laboratory Reference Sample The Absolute Standard
【THE HOLY GRAIL OF ANALOG AUDIO】 The A&D (AKAI & Mitsubishi) GX-Z9100EV represents the final evolution and the absolute zenith of cassette deck engineering. This specific unit, however, transcends the definition of "vintage audio." It is a "Champion Unit" (Master Reference Machine)—the very device used by AKAI’s Chief Engineers to define the "Golden Standard" for the entire production series (see images 1, 2, 7, 10).
【UNRIVALED PROVENANCE: THE SOUL OF AKAI R&D】 As a former engineer within the AKAI Electric Development Department, I am proud to present a piece of our history. This machine was the cornerstone of performance management within our laboratory. Direct Lineage: This unit was entrusted to me by a colleague as a commemorative gift upon my departure from AKAI. To this day, I keep a framed photograph of myself and the colleague displayed right beside this machine (see image 10). It serves as a constant reminder of the passion and rigorous standards we held in the lab. The "SAMPLE UNIT ONLY!" Seal: The factory-engraved label on the rear panel certifies this as a non-retail, manufacturer-held treasure (see image 1). Serial Number 00025: An ultra-low serial number confirming it was among the first units ever hand-assembled and tuned by the original design team (see image 1). R&D Laboratory Provenance: Unlike mass-produced units, this unit underwent rigorous hand-tuning. The unique engineering marks on the PCB, such as hand-written characters and manual component stabilization (see images 3, 4), are raw evidence of its laboratory provenance. It is a living artifact of AKAI's engineering peak.
【EXCEPTIONAL ENGINEERING & MINT CONDITION】 Unlike mass-produced units, the "Champion Unit" underwent rigorous component selection to ensure 100% adherence to the engineer's vision. Master-Level Maintenance: To honor its status as a reference standard, the following professional restoration has been performed. (see images 5, 6): Drive Mechanism: New high-precision pinch rollers, idler rubber, and cam motor belt installed (exchanged parts in image 5). Mechanical Integrity: Deep cleaning of auto-selector switch contacts; application of professional-grade lubricants. Acoustic Calibration: Full head demagnetization, micron-accurate azimuth alignment, and optimization of recording/playback bias using reference tapes and oscilloscopes (see measurements in image 6). Exterior: The iconic copper-plated chassis remains in immaculate, lustrous condition (see image 8). The FL display is bright and fully functional (see image 7).
【TECHNICAL SPECIFICATIONS & ACCESSORIES】 Model: A&D GX-Z9100EV (The Final Evolution) Heads: Discrete 3-Head System featuring LC-OFC Class 1 GX Heads (see image 2). Accessories Included: Original Owner’s Manual, Dedicated Remote Control (GX-Z9100R) (see image 9), and exchanged worn parts (included for historical value; see image 5).
【IMPORTANT: SHIPPING & TERMS】 ※ PLEASE NOTE: DOMESTIC SHIPPING ONLY (Within Japan) No International Shipping: I do not ship directly to overseas addresses. International buyers must use a proxy bidding/shipping service (e.g., Buyee, ZenMarket, etc.) with a Japanese shipping address. Voltage: AC 100V (Japan Standard). Packaging: This is a highly delicate, museum-quality instrument. It will be double-boxed with professional-grade cushioning for safe domestic transit. Terms of Sale: Due to the historical nature and age of this reference machine, it is sold As-Is (No Claims / No Returns). A Message to Prospective Owners This acquisition is more than a purchase; it is the inheritance of the AKAI engineering legacy. I hope it finds a home with a passionate owner who will continue to preserve its "Perfect Sound" for the next generation.
【MUSEUM-GRADE PACKAGING: DOUBLE-BOXED STRATEGY】 To ensure this historic "Champion Unit" arrives in its pristine state, I will employ a professional Double-Boxed shipping method: Inner Layer: The unit will be wrapped in thick anti-static cushioning and secured within a fitted inner box. Outer Layer: This will be placed inside a larger, heavy-duty outer carton with shock-absorbing materials filling all voids. As a former AKAI engineer, I treat this machine with the utmost respect and will personally oversee the over-engineering of its packaging to guarantee safe domestic transit to your designated address (or proxy warehouse).
【Operational Verification Video】 A video demonstrating the basic operations and the pristine mechanical condition of this unit (including remote control response) is available on YouTube. Please see the link below to witness its "Perfect Standard" performance: [ https://youtu.be/RJWFB3ntkx0?si=3GPje7KP38nsb1LS ] *Please copy and paste the URL into your browser to watch.