Whirlwind DA-2 manual

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A good user manual

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First and foremost, an user manual of Whirlwind DA-2 should contain:
- informations concerning technical data of Whirlwind DA-2
- name of the manufacturer and a year of construction of the Whirlwind DA-2 item
- rules of operation, control and maintenance of the Whirlwind DA-2 item
- safety signs and mark certificates which confirm compatibility with appropriate standards

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Usually it results from the lack of time and certainty about functionalities of purchased items. Unfortunately, networking and start-up of Whirlwind DA-2 alone are not enough. An instruction contains a number of clues concerning respective functionalities, safety rules, maintenance methods (what means should be used), eventual defects of Whirlwind DA-2, and methods of problem resolution. Eventually, when one still can't find the answer to his problems, he will be directed to the Whirlwind service. Lately animated manuals and instructional videos are quite popular among customers. These kinds of user manuals are effective; they assure that a customer will familiarize himself with the whole material, and won't skip complicated, technical information of Whirlwind DA-2.

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It is mostly in the manuals where we will find the details concerning construction and possibility of the Whirlwind DA-2 item, and its use of respective accessory, as well as information concerning all the functions and facilities.

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Table of contents for the manual

  • Page 1

    INTRODUCTION Thank you for sele cting the US Audio DA - 2. The DA - 2 is a 2 - channel, line - level, audio signa l distribution ampli fier. Each channel provides four electro nically balanced XLR outputs with individua l volume controls. T he audio performance is of the a bsolute highest quality pos sible and at a reasonable price point, making it[...]

  • Page 2

    Block Diagram: The DA - 2 can be configured as a 2 by 4 or a I by 8 distribution am p through the combine circuit. THEORY OF OPERATION The U.S. Audio DA - 2 is a dual channel li ne - level distribution amplif ier with four output s per channel. A ll inputs and outputs are active electr onically balanced circuits accessed t hrough XLR connectors. T [...]

  • Page 3

    1. Output Volume Pots control the level at the corresponding rear pa nel output XLR. Each of the controls has a gain range of - 60dB attenuation at ful l off to + 18dB of gain at full on. 2. Individual Clip LEDs on all 8 outputs an d on each of the two input s indicate signal overload conditions within the cir cuitry. The red clip lights illuminate[...]

  • Page 4

    Frequency response ± .3dBm 20 to 20KHz ± 3dBm 3 to 140KHz Input impedance 1Meg Ohm balanced Max. input level +23dBm unbalanced +28dBm balanced Output impedan ce 112 Ohm balanced, g round lifted Max. output lev el +22dBm unbalanc ed +28dBm balanced T.H.D. .004% at 1kHz. <.005% 20 - 20kHz Rise time 3uSec Phase shift .5 degree at unity gain Inter[...]