The all new ART Digital MPA-II delivers all of the same great features of the ProMPA with the added versatility of digital output. Like the ProMPA-II, each input circuit has 48v phantom power and features variable input impedance which can radically vary the overall performance of any high quality dynamic or ribbon microphone. The Digital MPA-II can be configured for dual mono or stereo operation with selectable mid/side mic support, summing the adjacent channel, to decode left/right signals. The input section of the Digital MPA-II operates at either a low or high plate voltage applied to the two integrated hand-selected 12AX7 tubes for wider variation of preamp tone and performance. Large back-lit analog VU output meters display output levels while multi-colored LED arrays, with average or peak hold, show tube gain and digital output levels. In addition to XLR and 1/4″ analog outputs, the Digital MPA-II features a high quality A to D converter which offers digital connectivity on S/PDIF, ADAT, or AES/EBU outputs. A rotary control on the front panel allows selection of format and sample rates from 44.1 to 192 KHz and 16 bit dithering. There is also a push button for, and two wordclock jacks, allowing loop-through. The Digital MPA-II comes in a standard 2u space rack-mountable steel chassis, with CNC routed black anodized aluminum face panel. Features Variable Input Impedance For Flexible Microphone Voicing (150 Ohms To 2400 Ohms) Selectable Plate Voltage Large VU Meters Backlit Function Switches Discrete Class-A Input Microphone Preamplifier Low Noise at Lower Gain Settings Extremely Low Total Harmonic Distortion (THD) Wide Frequency Response Additional Front Mounted Instrument Input Jack Supports Mid/Side Miking Technique Operates at +4dbm/-10dbv Output Selectable Stereo/Dual Operation of Output Controls Automatic Instrument Input Selection 24-204KHz External sample rate 44.1K, 48K, 88.2K, 96K, 176.4K, 192K Internal sample rates 24/16 bit switchable dithering Wide dynamic range A/D Rotary Encoder for quick selection of sample rate Separate analog and digital output level controls Digital Level LED meters display both Average and Peak level ADAT optical I/O Sync to incoming ADAT data rate Switch selectable optical output (S/PDIF or ADAT) AES/EBU and S/PDIF outputs Two wordclock jacks allowing loop through Specifications Analog Section: Frequency Response 15Hz to 48 kHz (+0, -1dB) @ normal plate voltage 15Hz to 120 kHz (+0, -1dB) @ high plate voltage Dynamic range: >110dB (“A” weighted) CMRR: >90dB THD: 800K Ohms (Instrument) Maximum Output Level: +27dBu (XLR) Output Impedance:: 112dB “A” weighted (typical) A/D THD: 10K Ohms Power Requirements: USA – 105 to 125 VAC / 60 Hz Export units configured for country of destination Dimensions: (HxWxD in) 3.50 x 19.0 x 8.75 Dimensions: (HxWxD mm) 88 x 482x 222 Weight: (lb/kg) 10.5 / 4.7
