Instruction/ maintenance manual of the product DA-2 Whirlwind
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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.
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.
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.
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.
An important point after buying a device Whirlwind DA-2 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Whirlwind DA-2 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Whirlwind DA-2 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Whirlwind DA-2 you will learn all the available features of the product, as well as information on its operation. The information that you get Whirlwind DA-2 will certainly help you make a decision on the purchase.
If you already are a holder of Whirlwind DA-2, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Whirlwind DA-2.
However, one of the most important roles played by the user manual is to help in solving problems with Whirlwind DA-2. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Whirlwind DA-2 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
