Featuring the same technical specifications and - most importantly - the sound as the original HD 25, the mechanical joint between the actual ear-cups and the headband has been improved and its joints are now more solid, providing a smoother adjustment for a better fit

Solid, Powerful Suitable for headphones ranging from 16 to 150 Ohms, the Fiio A3 is potent enough to drive all but the most power hungry headphones. Use the low gain setting with high sensitivity IEMs, or switch it to high gain for full size headphones. Audiophile Grade Design The A3 offers superior sound quality through expertly selected components and design. Its pre-amplifier section is based on the TI OPA1642, with excellent layering, midrange resolution, and high frequency extension. The power amplifier section relies on the AD8397 for great bass control and smooth drive characteristics. Sophisticated Bass Boost A fully discrete bass boost circuit increases output by 3.5dB at 60Hz, producing a gentle swell of low end energy that preserves the overall sound field. The bass boost circuit is completely bypass when off to ensure low noise floor and purity of sound quality.

Set Includes:
Sennheiser HD 25 PLUS Monitor Headphones
Coiled Cable and Straight Cable
Set of Ear Cushions
Protective Pouch
Limited 1-Year Warranty
FiiO A3 - Portable Headphone Amplifier (Black)
USB Charging Cable
Limited 1-Year Warranty