Firestone Audio Spitfire MkII 24 Bit DAC - Black The 2011 Spitfire Mk II is a premium, hi-end DAC for the discriminating audiophile Burr Brown PCM1793: (24 Bit - 96 kHz Max) Inputs: 1 X USB, 1 X Toslink optical, 1 X digital coax (USB priority) Output: 1 X Gold Plated RCA Package Includes: Spitfire Mk II - 24 Bit DAC, 1.5m interconnects, USB cable