Firestone Audio Fubar II - Silver USB Audio Interface Digital to Analog Burr Brown PCM2702 DAC, 16 Bit 44.1 KHz / 48KHz sampling rates OP Amplifier OPA2604 (exchangeable, lets you tune to suit your taste) Frequency Response: 10Hz~25KHz ,-1dB at 600 ohms loading, low noise -99dB(A) Size: 11cm/4.3in(L) x 8cm/3.2in(W) x 5cm/2.0in(H) Weight: 300g / 10.6oz