Headphones amplifiers — Schiit Audio FULLA 2

The FULLA 2 is an accessible headphone amplifier and DAC from Schiit Audio, built around the popular 32-bit AK4490 DAC chip, with an OPA1662 dual-channel op-amp and an LMH6643 current buffer handling amplification duty. The FULLA 2 brings Schiit's considered American engineering to a compact, entry-level headphone-amplification format.

Key specs that matter

Maximum power is 200mW RMS per channel into 32 ohms, falling to 150mW into 50 ohms and 40mW into 300 ohms. Frequency response spans 20Hz to 20,000Hz within plus-or-minus 3dB. THD is an exceptionally low under 0.001% at 1V RMS into 300 ohms. Signal-to-noise ratio exceeds 108dB, with IMD under 0.001%. At 89 x 63.5 x 35mm and a featherweight 0.260kg, the FULLA 2 maintains an exceptionally compact desktop headphone-amp-and-DAC chassis, well matched to headphones such as the Oppo PM-3, Sennheiser HD-650, and Audio-Technica ATH-IM series.

Sound and use context

Expect exceptionally clean, low-distortion amplification reflecting the exceptionally low sub-0.001% THD combined with the signal-to-noise ratio exceeding 108dB, representing accomplished value at this accessible price tier.

Pairing

The FULLA 2 is well suited to moderate-impedance headphones such as the Oppo PM-3, Sennheiser HD-650, and Audio-Technica ATH-IM series, as specifically noted by Schiit.

Alternatives

Schiit Audio's own broader headphone-amplifier catalogue offers related, more powerful alternatives within the same considered engineering philosophy.