10 Best Headphone Amplifiers 2025 in the United States

The Vox amPlug 3 AC30 is a compact and lightweight headphone guitar amplifier that delivers the iconic sound of the classic VOX AC30 tube amp. Weighing just 40 grams, it's very portable and ideal for travel. The amplifier is designed to provide rich, dynamic tones with its dual-channel design, offering a range of sounds from clean to overdriven. The analog circuitry ensures the interactive dynamics and rich overtones typical of a tube amp, which guitar enthusiasts will appreciate.

Additionally, it features nine built-in rhythms in various genres for practice and jamming, and a range of immersive stereo effects like reverb, delay, chorus, and flanger, enhancing the playing experience. A significant advantage is its up to 16 hours of playtime on two AAA batteries, which is impressive for its size. The auxiliary input allows users to jam along with their favorite tracks, and the included TRRS cable enables connections to smartphones or tablets for recording and streaming.

However, potential users should note that while it offers great sound quality and features in a small package, the power output is limited to 50 milliwatts, which might not be sufficient for high-volume playing. Additionally, being made of plastic, it may not have the premium feel some users prefer. Despite these limitations, it is ideal for guitarists who need a portable practice solution with versatile sound options.

The iFi xDSD Gryphon is a portable balanced DAC and headphone amplifier designed for high-resolution audio enthusiasts. It boasts impressive power output of 1000mW, ensuring it can drive a wide range of headphones with ease. Impedance matching is handled effectively with built-in iEmatch and auto-gain technology, which automatically adjusts the output to suit the sensitivity of different headphones and in-ear monitors. This makes it versatile and user-friendly for various audio setups.

The Gryphon offers ultra-low Total Harmonic Distortion, providing clear and accurate sound reproduction. The Signal-to-Noise Ratio is optimized for cleaner playback, making it suitable for critical listening and audiophile use. Gain control is robust and adaptive, further enhancing its usability with different headphones. Additionally, the Gryphon supports full MQA decoding and native DSD up to DSD512, catering to high-resolution audio formats. The device is compact and lightweight at 7.6 ounces, making it highly portable, and its sleek military-grade aluminum design adds durability and a premium feel.

Connectivity is diverse with Bluetooth 5.1, USB-C, S-PDIF, and analog inputs/outputs, offering flexibility for various audio sources. Advanced features like XBass and xSpace settings further enhance the listening experience. However, it’s worth noting that it does not include a TOSLINK Mini-Plug to TOSLINK Adapter, which might be necessary for some users. For those looking for a high-performance portable headphone amplifier with advanced features and multiple connectivity options, the iFi xDSD Gryphon is a strong contender.

The CHORD ELECTRONICS Mojo 2 stands out in the headphone amplifier category with several notable strengths. Its power output is solid, ensuring a high-quality and robust audio experience. The device offers versatile input options, including Micro USB, coaxial, and optical TOSLINK, all supporting high-resolution audio formats. This versatility makes it compatible with a range of devices, from personal computers to smartphones and tablets.

Impedance matching is well-managed, enhancing the listening experience across different headphones. The low Total Harmonic Distortion (THD) ensures clarity and precision in audio playback, while a high Signal-to-Noise Ratio (SNR) minimizes background noise, providing an immersive sound experience. Gain control is available for fine-tuning audio output to match personal preferences and headphone specifications.

Portability is a significant advantage, given its compact dimensions (3.26 x 2.44 x 0.9 inches) and lightweight design (10.8 ounces), making it easy to carry and use on the go. However, it may not be the best option for users seeking a budget-friendly amplifier, as it ranks relatively high in price. Additionally, while it offers extensive compatibility, it might require additional adapters for certain devices, which could be an inconvenience. The Mojo 2 is a powerful, versatile headphone amplifier that excels in audio quality and portability, suitable for audiophiles and those looking for high-end performance.