NOBORU Japanese Industrial Retro: Passive Phone Amplifier, Rugged Metal NMP-011

REAL INDUSTRIAL HORN SPEAKER REBORN AS PASSIVE PHONE AMPLIFIER The industrial "Reflex Horn Speaker" has long been used in demanding settings, from outdoor announcement systems to public address (PA) systems in factories, stores, and schools. This non-powered speaker is crafted using the actual industrial designs, materials, and molds of those professional units, bringing an uncompromising rugged industrial aesthetic to your desk. TIMELESS DESIGN: THE ESSENCE OF "AUTHENTIC INDUSTRIAL RETRO" NOBORU’s industrial horn speakers have remained virtually unchanged since the company’s founding in 1945. Their design is so perfected for rugged durability and acoustic performance that it has required no modification for decades. We have condensed this history—trusted by professionals in demanding environments for generations—into a rugged statement gadget for your daily life. TRADITIONAL JAPANESE CRAFTSMANSHIP: THE OSAKA WORKSHOPS The horn is expertly crafted from a circular aluminum plate using traditional "Metal Spinning" techniques. The rear housing is made of heavy-duty die-cast aluminum alloy. The final touch is a specialized heat-baking coating process with a multi-layered finish. These processes create a tough, rugged surface—the same as industrial equipment designed for long-term use—and reflect NOBORU’s heritage of craftsmanship. NATURAL RESONANCE: 3X AMPLIFICATION WITHOUT POWER This passive amplifier increases smartphone volume through physical resonance, requiring no batteries or electricity. It features a complex internal acoustic path that is three times the length of the horn itself, allowing for efficient sound projection. Tests conducted in anechoic chambers confirm an average volume increase of approximately 10 decibels, which is equivalent to 3x amplification. GENTLE ACOUSTICS: A WARM, NOSTALGIC SOUND Distinct from High-Fidelity (Hi-Fi) audio, NOBORU’s acoustic design—rooted in industrial-grade PA systems—is specifically tuned to emphasize the clarity of human voices and acoustic signals. Originally engineered for long-distance projection in demanding environments, this unique tuning delivers a warm, nostalgic sound that adds a distinct character to your space. ALIGNED WITH THE "LO-FI" SOUND NOBORU’s focus on industrial-grade performance—ensuring voices and acoustic signals remain clear even at a distance—is also uniquely suited for the "Lo-Fi" sound experience. This specific acoustic signature is a direct byproduct of professional engineering designed for durability and clarity. Rather than digital precision, it offers a distinctive, analog-like texture that resonates with those who appreciate the nostalgic, warm character of functional industrial equipment. VERSATILE PLACEMENT: FREEDOM FROM POWER OUTLETS Because this device operates entirely without electricity, it is not restricted by the location of power outlets. Its rugged construction allows for use in various environments, including desks, kitchens, garages, or outdoors. It offers the flexibility to enjoy sound anywhere, completely independent of a power source or cable constraints. SMARTPHONE DOCKING & CHARGING A dedicated opening at the base allows a charging cable to be connected while your smartphone is docked in the rear housing. This functional design ensures your device remains powered during long listening sessions, or allows for overnight charging so your phone can be used as a powerful morning alarm. It serves as both a high-performance passive amplifier and a stable charging stand, making it a reliable companion for your bedside or workspace. A LIFETIME COMPANION: A UNIQUE GIFT With its robust construction and industrial aesthetic, this amplifier is designed for long-term use, where the metal's character deepens as it integrates into your life. The combination of expert craftsmanship and durable materials ensures that the device remains a functional part of any home or workspace for years to come. As a "statement gadget" that balances professional-grade quality with daily utility, it serves as a unique gift for those who value authenticity and functional beauty. SPECIFICATIONS Materials: - Aluminum (Horn) - Die-cast aluminum alloy (Rear Housing) - Steel plate (Bracket) Color: Gray (Munsell N5 semi-gloss equivalent) Dimensions: - Diameter: 160 mm (±2 mm) - Depth: 178 mm (±2 mm) - Height: 165 mm (±2 mm) Weight: 460 g (±10%) Compatible Smartphone Size (including case): - Width: Up to 78 mm - Thickness: Up to 15 mm Included Items: Instruction Manual [IMPORTANT NOTES BEFORE YOU BUY] To ensure this product meets your expectations, please review the following points before completing your purchase: - Size: Ensure your phone and case dimensions fit the specifications provided. - Speaker Position: Compatible with the standard speaker layout found on most smartphones (located at the bottom). - Finish and Color: Minor variations in surface finish and color are natural results of industrial manufacturing and display settings. These are not defects. - Included Items: Includes the amplifier only. Other items such as smartphones and cables shown are for illustration purposes and are not included. 2022 CERTIFIED AS A "MADE IN OSAKA BRAND" This product has been certified as a "MADE IN OSAKA BRAND" by the Governor of Osaka Prefecture, recognized for its exceptional charm, superior techniques, and creativity as a small- and medium-sized enterprise in Osaka. This designation is a mark of official endorsement by the Osaka Prefectural Government, representing a masterpiece that combines originality with proven technical expertise. ABOUT NOBORU (NOBORU ELECTRIC CO., LTD.) Founded in 1945. NOBORU is one of the few specialized manufacturers in Japan focused on industrial-grade public address (PA) systems. For decades, we have developed and produced high-durability speakers for demanding environments, including public broadcasting, maritime use, vehicle systems, and professional megaphones. To share our brand heritage and technical expertise with a wider audience, we leverage our long-standing experience to create "Authentic Industrial Retro" unique audio gadgets. These products showcase a distinctive sound signature rooted in industrial PA technology.