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**DISCONTINUED: iBasso's PB5 Osprey Portable Tube Amp is sold out and discontinued. Check out the newest version, the iBasso PB6 Macaw! |
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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. |
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.
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.
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.
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.
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