DA1000 DISTRIBUTION AMPLIFIER OPERATING AND MAINTENANCE MANUAL © Copyright 2011, ATI Audio Inc. ATI Audio Inc. ■ Tel: 856-626-3480 ■ Fax: 856-504-0220 ■ sales@atiaudio.com ■ www. audio.
DESCRIPTION The DA1000 is a 1X8 Analog Audio Distribution amplifier. A single balanced bridging input is level-regulated via a front panel level control and the signal is sent to eight balanced differential outputs and a front panel mounted headphone jack. Power, Signal Present and Output Clipping indicators are located on the front panel. The ICs developed primarily for the instrumentation market had many shortcomings when used in high quality audio applications.
SIGNAL PRESENT INDICATOR The second half of Al monitors the voltage at the output of the input buffer IC. The green Signal Present LED on the front panel will light for audio inputs over -30dBm. The LED will normally flicker with applied program material to tell you that all is well. (Happiness is a green LED.) OUTPUTS Audio from the input buffer is AC coupled to the front panel level adjust potentiometer. This control adjusts the level of all outputs.
light the yellow OUTPUT CLIPPING LED. Conserve power—try not to light the yellow LED. HEADPHONE OUTPUT The front panel headphone jack provides a ninth output with its own set of build-out resistors. The phone jack is a convenient metering point, an auxiliary output or headphone output. The jack is wired primarily to drive stereo headphones with an inphase mono signal; consequently tip (red) and ring (blue) are wired together and to the HI output, and the sleeve connection (white) is wired to the LO output.
Audio inputs and outputs should be connected using the rear panel labels as a guide. HI outputs are all in phase with each other and in phase with the HI inputs. Fanning strips are provided so that our ears won't be burning in the middle of the night while you are trying to wrap wires around tiny barrier strip screws. The fanning strips are Kulka part number 649A22 and extras are available from our Parts and Accessories Department.
TECHNICAL SPECIFICATIONS OUTPUT CLIPPING LEVEL +24dBm @ 600 ohms load DISTORTION .2% maximum THD, 20-20kHz @+24dBm output and input levels to +24dBm FREQUENCY RESPONSE ±.25dB, 20 to 20kHz; -3dB at 100 kHz OUTPUT NOISE -70dBm maximum @ 20kHz measurement bandwidth, 600 ohm source impedance and max gain HUM REJECTION 80dB for common mode hum INPUT IMPEDANCE Balanced differential inputs, 30,000 ohms bridging.
One Year Limited Warranty ATI warrants this product to be free from defects in materials and workmanship to its original owner for a period of one year from date of purchase. ATI will repair or replace such product or part thereof, which upon inspection by ATI, is found to be defective in materials or workmanship. The Proper Return Authorization Number must be obtained from ATI in advance of return. Contact ATI at 856-626-3480 or email sales@atiaudio.
