ATI DDA212-XLR Series 2 Dual-Input 1x12 Digital Audio Distribution Amplifier


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  • DDA-212 Series 2 Digital Audio Distribution Amplifiers are designed to regenerate, isolate and distribute digital audio data formatted in accordance with specifications AES3-1992 and IEC 958. This is commonly called AES/EBU formatting or AES3.

    DDA-212 Series 2 units have two inputs and 12 outputs, with the assignment of inputs and outputs configurable from a front panel switch. The unit may be operated as a Dual 1X6 or as a 2-Input 1X12, depending on the Input Select switch setting. The selected input feeds AES audio to either six or all 12 separate outputs.

    A front panel switch selects either re-clocking or non-reclocking of the input signal. In most cases, re-clocking is preferred, as this feature improves the integrity of weak or distorted input signals. Re-clocking may be switched off to allow distribution of AES sync signals, Dolby E encoded AES signals, or other signals that should not be re-clocked.

    DDA-212 Series 2 units work with AES signals that contain sample rates from 27 through 192kHz and 16-bit through 24-bit density, thus permitting very high resolution signals to be distributed.

    The front panel displays full status of the input signal, including Sample rate, Word Length, Digital Errors and Pro or Consumer Mode.

    DDA-212 Series 2 units contain a unique automatic equalization function that can adjust for extremely long input lines. Equalization works independently for each input. A Front Panel Lock feature protects all your settings.

    The Model DDA-212XLR uses XLR connectors and operates from and drives a 110-ohm balanced shielded twisted pair distribution system per AES3-1992.

    S/PDIF (consumer) formatted digital audio data differs primarily in the use of consumer type "RCA" audio connectors in an unbalanced 75 ohm system and can be handled by a DDA- 212BNC with use of an RCA-to-BNC input cable.

    Input Loop-through connections for each of the two inputs are provided to permit multiple units to be stacked, or to insert the DDA-212 into your digital workflow. Switchable line termination is provided. Standard practice dictates that the last AES input be terminated; therefore, if you are not using the loop-through feature, Input Termination should be switched ON.


    • Configurable for Dual 1X6 or 2-Input 1X12 operation
    • Accepts sample rates from 27 to 192kHz
    • Displays standard sample rates of 32, 44.1, 48, 88.2, 96, 176.4 and 192 kHz
    • Displays Word Length of 16, 18, 20 and 24 bit
    • Status and error LEDs show clock lock and data validity
    • Automatic input equalizers compensate for very long cable runs
    • Switchable re-clocking regenerates stable data before distribution
    • Loop thru transformer balanced and isolated inputs
    • Switchable input termination
    • Individual, transformer balanced and isolated 110-ohm XLR outputs
    • Two front-panel-selectable inputs
    • 12 outputs
    • Front panel control locking system
    • Quiet, internal linear power supply
    • Attractive and rugged 1RU package
  • INPUT CONNECTORS XLR female; paralleled input connectors for loop-thru expansion
    LEVEL 0.2Vp-p minimum
    IMPEDANCE Transformer isolated, balanced and floating, XLR 110 ohms
    CABLE LENGTH > 1000 feet (300 meters) of 110 ohm cable with equalizer
    EQUALIZER Automatic EQ for long lines via front panel push button
    CLOCK Regenerated from input signal with dual mode PLL or non-reclocked to preserve Surround coding, switchable
    LEVEL XLR 4Vp-p loaded
    IMPEDANCE XLR 110 ohms, balanced and transformer isolated
    OUTPUT JITTER < 300 picoseconds peak to peak
    PROPAGATION DELAY < 25 nanoseconds
    INDICATORS INPUT FAULT Input 1, Input 2; identifies input with error condition
    INPUT SAMPLE RATE 32, 44.1, 48, 88.2, 96, 176.4 and 192 kHz
    INPUT WORD LENGTH 16, 18, 20 and 24 bits
    INPUT DIGITAL ERRORS Bi-Phase/Parity, Validity, Non-Linear PCM, DTS-CD Signal
    MODE Pro, Consumer
    INPUT CABLE EQ Locked, Enabled
    INPUT SELECT 1, Bridge, 2
    POWER LED indicates power is applied
    POWER Internal Supply, 115/230VAC (selectable via internal jumper) ±10%, 50/60Hz, 10VA, IEC320 3 pin connector
    SIZE 19” W x 1.75“ H x 8.5” D; 9 lbs.
    WARRANTY Limited, One Year Warranty
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