iBasso PB5 Portable Balanced Tube Amplifier

The iBasso PB5 Portable Balanced Tube Amplifier is a high performance audio solution designed for audiophiles who want the warmth of vacuum tubes combined with powerful solid state output. Featuring dual Nutube tubes and a Super Class A discrete amplifier stage, the PB5 delivers a rich, dynamic, and immersive sound experience.

Built with a unique multi battery power system and precision components, it brings desktop level amplification into a portable form.

Features

• Nutube input/Super Class A discrete output amp
• Output power <1,700 mW per channel
• Frequency response 20hz-40Khz
• 4.4mm output impedance <0.3ohms

Dual Nutube Tubes for Warm and Musical Sound

The PB5 uses dual Nutube 6P1 vacuum tubes developed by KORG and Noritake. These tubes replicate the rich harmonic characteristics of traditional vacuum tubes while offering improved efficiency and compact size.

This results in a warm, natural, and engaging sound with smooth mids and detailed highs.

Super Class A Amplification for Powerful Output

The PB5 features a Super Class A discrete amplifier stage that delivers high current and excellent control. With up to 1700mW per channel, it can easily drive demanding headphones while maintaining clarity and precision.

Six Battery Power System for Pure Performance

The amplifier uses a unique six battery design to provide clean and stable power. Two batteries power the tube stage while four batteries supply the output amplifier, ensuring minimal interference and improved sound quality.

Precision Volume Control with Stepped Attenuator

The 24 position stepped attenuator ensures accurate volume adjustment with excellent channel balance. This high end analogue control maintains sound integrity and reduces noise during operation.

Reduced Microphonics for Stable Sound

A two step suspension system minimizes vibration and microphonic effects, especially important for tube amplifiers. This ensures consistent and distortion free performance.

Balanced Output for Maximum Compatibility

The PB5 includes a 4.4mm balanced output with very low output impedance, making it suitable for a wide range of headphones and IEMs.

Designed for High End Audio Systems

The PB5 supports line input up to 2.5 volts and pairs well with high end digital audio players. It is ideal for users looking to enhance their portable or desktop audio setup.

Technical Specifications

• Output power up to 1700mW plus 1700mW at 32 ohms
• Frequency response 20Hz to 40kHz
• Output impedance less than 0.3 ohms
• Amplifier type Nutube plus Class A discrete

What is Included

• iBasso PB5 portable tube amplifier
• Accessories to be confirmed

Who This Is For

• Audiophiles seeking tube warmth in a portable amplifier
• Users with high end digital audio players
• Music lovers wanting powerful and dynamic sound
• Anyone upgrading to a premium portable amplification solution

Experience Tube Sound Anywhere

The iBasso PB5 combines the classic warmth of vacuum tubes with modern Class A amplification to deliver a powerful and musical listening experience. It is an excellent choice for those who want high fidelity sound with character and depth.