ADA-204A Dual 1x4 Audio Distribution Amplifier

ADA-204A Front View


The ADA-204A is a two channel, 1 input by 4 output audio distribution amplifier.

The ADA-204A can function as two independent 1x4 amplifiers, a stereo 1x4 system, or as a mono 1x8 distribution amplifier.

All inputs and outputs are balanced, and the gain of each output is independently adjustable. The 8 gain controls are accessible from the front of the unit and are variable over a wide range, in order to accommodate most signal level requirements.


ADA-204A Specifications

Power Requirements 115 VAC, 60 Hz or 230 VAC, 50 Hz; 8.5 W

Audio Inputs

Input Impedance 20 kohms balanced
Input Signal Level +8 dBm nominal, +26 dBm maximum
Input Connectors Screw clamp terminal blocks
Output Load Impedance600 ohms nominal
Common Mode Rejection -86 dB @ 60 Hz

Audio Outputs

Number of Outputs 4 per channel, 2 channels total
Output Impedance 60 ohms balanced
Output Level +8 dBm nominal, +26 dBm maximum
Output Gain Range -6 dB/+16 dB
Output Connectors Screw clamp terminal blocks
DC Offset Less than 20 mV
Frequency Response 20 Hz to 30 kHz +/-0.1 dB
T. H. D. + Noise Less than .015%, 20 Hz to 30 kHz, nominal output
Hum and Noise -90 dBm, 20 Hz to 30 kHz
Crosstalk -110 dB @ 20 kHz

Physical Dimensions (Inches)

ADA-204A8.1 W x 1.9 H x 5.1 D

Ordering Information
ADA-204AStand alone Table Top Version
ADA-204A/R11 Unit Rack Mounted in 1 RU Frame. Unit takes 1/2 of the rack frame
ADA-204A/R22 Units Rack Mounted in 1 RU Frame
ADA-204A/AAssembly unit only. Ordered for existing Frames
ADA-204A/MManual
PH-3/FRPhase 3 Rack Frame with no Products Installed
PH-3/BFPhase 3 Blank Front Panel plate
PH-3/BRPhase 3 Blank Rear Panel Plate
PH-3/DBPhase 3 Under the Desk Mounting Bracket
Please note that the Phase 3 products may be order in combination with other units. Example A2D-1/D2A-1 is a Rack Frame with one A2D-1 and one D2A-1 together on the same frame.

ADA-204A Rear View


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