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The Verdict? The FiiO K3 is definitely one of the best portable headphone amps you can find that delivers superb sound with great sensitivity levels. There’s also an RGB light that indicates the kind of digital audio input into the K3. The volume knob is 45 degrees etched onto its surface and well-sized to allow easy turning. This allows you to match headphones with all kinds of sensitivity for different listening needs. The K3 headphone amp uses ADC volume control which eliminates channel volume imbalances and also allows you to easily adjust the volume to a more accurate and finer degree. This allows you to connect to almost any digital source which is really convenient. We really liked that this amp supports multiple interfaces with dual headphone jacks (3.5mm and 2.5mm), 3.5mm auxiliary line out, coaxial and optical digital outputs. The K3 amp also implements over-voltage protection (OVP) and a double-filter circuit to ensure power supply stability.įor older devices, this headphone amp also supports two modes of USB audio 2.0 and USB 1.0. The USB-Type C ensures a more reliable and stable connection. This headphone amp comes with a modern USB-Type C input interface. The sound signature is crisp and clear, and the amp sensitivity works well for volume adjustment control across a variety of different headphone impedances. The sound quality on the FiiO K3 is really good – it gives your headphones a good boost in audio performance and you can also tweak the bass settings for a more bass-heavy sound signature. It is capable of decoding up to 384kHz/32 bit PCM and native DSD256 for quality sound performance. The FiiO K3 is one of the best portable headphone amps you can find that delivers really good sound performance with numerous connectivity options. ?Only supports one output source at a time Additional Features: Double pass filter for stable power.#1 Best Portable DAC Amp: FiiO K3 Portable Headphone Amp View the Best Portable Headphone Amps Below 18 #15 Best Headphone Amp for Gaming: Sound BlasterX G6 Portable Headphone Amp Best Portable Headphone Amps – our top 3 picks Top 3 Portable Headphone AmpsĬompare the Best Portable Headphone Amps Picture