**DISCONTINUED: iBasso's PB5 Osprey Portable Tube Amp is sold out and discontinued. Check out the newest version, the iBasso PB6 Macaw! Experience the Magic of Tube Amps in Your Pocket with iBasso PB5 OSPREY Powered by Dual Nutube 6P1 vacuum tubes Uses an advanced power supply with 6 (!!!) batteries to provide consistency electrical separation between components 24 Position, 4 Section Stepped Attenuator offers true analog volume control with unrivaled channel balance Cutting edge components and construction Bloom's Take The iBasso PB5 Osprey redefines portable tube amplification, blending the warmth and richness of dual 6th-gen Korg NuTube technology with the precision of a solid-state design. Delivering a spacious soundstage, smooth mids, and refined highs, the PB5 provides a natural, engaging musicality without sacrificing detail or control. With its fully balanced architecture, swappable op-amps, and impressive power output, it’s a true audiophile-grade amp that brings the magic of tubes to your on-the-go setup. Whether paired with IEMs or full-sized headphones, the Osprey soars with dynamic, immersive sound. Read the full review here. Dual Nutube 6P1 Vacuum Tubes Manufactured by KORG and Noritake, the 6th Gen Nutube operates exactly as a conventional triode vacuum tube and creates the same characteristic rich overtones that are sought after in triode tubes. At the same time, Nutube achieves substantial power savings, miniaturization, and quality improvements when compared with many conventional vacuum tubes. Voltage amplification is achieved with the Nutube, which results in a captivating and distinctive vacuum tube sound, all while maintaining exceptional linearity. Efficient Pure Power Supply The PB5 utilizes six batteries to establish a robust power supply system. The Nutubes are powered by 2 batteries while the other 4 batteries function as the power supply for the secondary amplifier. With an efficient and pure power supply, you will experience immersive and crystal-clear sound. 24 Position, 4 Section Stepped Attenuator Extremely diminutive 24 position, 4 section stepped attenuator. Optimal analog volume control enhances the ability to showcase the distinct analog characteristics of our vacuum tube amplifier. Channel imbalance is within a range of less than +/-0.1dB. When adjusting the volume, the noise floor is simultaneously attenuated. 2-Step Suspension & Cathode Input The two-step suspension absorbs vibration mechanically and minimizes microphonic effect. The cathode input reduces the impedance, resulting in reduced signal interference from external sources. Cutting Edge Components for Ultimate Analog Sound 24 position 4 section stepped attenuator with a channel tolerance of less than +/-0.1dB. Texas Instruments classic OPAMP OPA827, known for its exceptional performance and rich analog characteristics. Low VCEsat (BISS) dual transistors with a high output current of up to 2 amps. iBasso custom film capacitors contribute to the natural analog magic. Specifications Output Voltage: 9Vrms (4.4mm BAL) | 4.5Vmrs (3.5mm SE) Output Power：1700mW+1700mW @ 32Ω Output Impedance: 0.25Ω (4.4mm BAL) | 0Ω (3.5mm SE) Frequency Response 20Hz-40kHz +0.5dB/-2dB Recommended Headphone Impedance: 8~600Ω Input Port: 4.4mm TRRRS BAL Output Port: 4.4mm TRRRS BAL | 3.5mm TRRS SE Gain: +11.5dB (High Gain) | +2dB (Low Gain) Size: 5.4" x 3.2" x 1.1" (139mm x 82mm x 28mm) Weight: 12.4 oz (352g) In the Box PB5 OSPREY Protective case (x2) 4.4mm interconnect cables
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