Converter / headphone amplifier. Model HP-A4BL, designed being based on the current HP-A4, is an affordable USB DAC & Headphone amp offering balanced connection for headphones that is becoming more popular in the market. In addition to the balanced headphone out, it also complies with DSD Audio up to 11.2MHz. Compatibility with Windows 7 / 8 / 8.1 / 10 and Mac OSX(10.6 or later). Equipped with 4-pin XLR balanced output. Newly developed audio-grade capacitor is adopted. Highly precise crystal with low phase noise is adopted. Playback 24bit / 192 kHz PCM and 11.2 MHz DSD audio. High performance DAC (Barrbrown PCM1792A) is equipped. Asynchronous transfer up to 192kHz/24bit compatible with USB Audio 2.0 . HI/LO Gain selection (10dB) for wider selection of headphones. Digital Filter selecting Roll-Off characteristics and Cut-off frequencies. Dimensions: 150 x 34 x 157 mm. Weight: 630 g.