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AMP2A-10S User Guide Introduction Overview The AMP2A series units are complete, exceptionally high-quality stereo audio monitoring systems in a compact, 2RU. These models contain three audiophile-quality drivers and three power amplifiers; two amplifiers (and two speakers) that reproduce midrange and high frequency information in stereo, and a third amp/driver combination (and speaker) that handles summed low frequency (LF) information below the 500 Hz crossover point.
A M P 2 A - 1 0 S Us e r G u i d e S a f e t y I n s tr u c ti o n s Safety Instructions IMPORTANT: 1. Read, keep, and follow all of these instructions; heed all warnings. 2. Do not use this equipment near water or moisture. 3. Use only a dry cloth to clean the equipment. 4. Do not block any ventilation openings. Install only in accordance with the instructions in the section entitled, “Installation Recommendations” on page 3. 5.
AMP2A-10S User Guide I n s ta l la t i o n R e c o m me n d a t io n s Installation Recommendations Mounting The unit is designed to install into a standard 19" rack mounted at eye level for best visual observation of the monitor screens. Note: Be sure to set the level meter input level gain calibration and VU/PPM display mode DIP switch (accessed through the top cover) before installing the unit into an enclosed rack or console.
A M P 2 A - 1 0 S Us e r G u i d e D e s c r ip t i o n Audio Connections Connection of the audio feeds is straightforward. Please refer to the system interconnect block diagrams in Figure 1–5 on page 14 for clarification of the general signal paths into and out of the AMP2A-10S unit. Analog inputs via the 3-pin male Phoenix connectors are configured for 40K balanced connections.
AMP2A-10S User Guide Features The rear panel features ten selectable stereo pairs of analog inputs on balanced Phoenix connectors. It offers an analog output of the selected stereo source on two XLR connectors on the rear panel.
A M P 2 A - 1 0 S Us e r G u i d e Applications Applications The AMP2A-10S are ideally suited for use in VTR bays, mobile production vehicles, teleconferencing installations, multimedia systems, satellite links and cable TV facilities, and on-air radio studios.
AMP2A-10S User Guide A v a il a b l e O p t io n s Table 1–2 Level Meter Specifications for the AMP2A-10S Specification Level Meter Type Segment Quantity LED Segment Pitch Bar Graph Length Meter Dynamics Level Gain Dynamic Range Midscale Resolution Segment Colors Scale Table 1–3 Values 20-Segment LED bar graph 20 .01” (2.54 mm) 2” (50.
A M P 2 A - 1 0 S Us e r G u i d e Front Panel Features • Speakers: The AMP2A series internal speaker system is comprised of two mid-range tweeter speakers (left and right) and one woofer speaker (center). The two side channel speakers reproduce, in stereo, only the mid and high frequencies. • Power Indication LED: This LED glows green to indicate the AMP2A-10S unit is connected to mains power and an operation voltage is present.
AMP2A-10S User Guide Rear Panel Connectors intermittent instantaneous out-of-phase and in-phase conditions (small LEDs), a steady red glow of the larger LED almost always indicates an out-of-phase alarm condition. • Balance Control Pot: This control pans the volume balance between the left and right speakers. • Source Select Switch: This 10-position rotary switch selects one of ten stereo pair inputs for monitoring through the speakers (or headphones) and level meters.
A M P 2 A - 1 0 S Us e r G u i d e L e v e l M e t e r S e t t in g s a n d S p e c if i c at i o n s Connector pinout information is silk-screened between the two banks of input connectors. • Selected Output Connectors (3-pin male XLR): These connectors are analog outputs of the Analog Input Connectors (Item B or C) as selected by the Source Select Switch on the front panel. The left connector outputs the left channel (Channel A) and the right outputs the right channel (Channel B).
AMP2A-10S User Guide L e v e l M e t e r S e t ti n g s a n d S p e ci f i c a t i o n s Input Level Gain Calibration Settings DIP switch sections 1 and 2 set the level meter Input Level Gain Calibration, which determines the level of the input signal that will result in a 0 reading on the meter bar graph. The factory setting is +4 dBu, but can be set for -6 dBu, 0 dBu, or +8 dBu by the user. See the diagram below for settings. Note: Example: Each bar graph segment will turn on at 0.
A M P 2 A - 1 0 S Us e r G u i d e Level Meter Bar Graph Fine Adjustment Level Meter Bar Graph Fine Adjustment 1. To remove the top cover, remove the top cover screws (2 along upper front panel, 2 per each side, 3 along upper rear panel, and 1 center top). The 919030 PCBs (2 each) are vertically mounted to the chassis bottom just behind the front panel-mounted LED bar graph displays, one for each bar graph. 2.
AMP2A-10S User Guide T e ch n ic a l F u n ct i o n a l D i a g ra m 2. Locate P2 on the 919030 bar graph driver PCB(s) you wish to adjust. The P2 trim pot faces upward from the PCB edge. Of the two trim pots visible (P1 and P2) it is the farthest from the front panel as mounted to the chassis. 3. Connect an analog audio signal of an amplitude of approximately 1 kHz of the amplitude desired to give a “Peak” indication on the bar graph (top segment) to the input of the bar graph you wish to adjust. 4.
AMP2A-10S User Guide Technical Functional Diagram Figure 1–5 Analog Inputs (Pair 1-10) AMP2A-10S Block Diagram Right Input 1 2 3 4 5 6 7 8 9 10 Left Input 5 6 4 3 2 1 10 7 8 9 Source Pair Select Headphone 20-Segment Level Meters Volume Balance L Left R L R Stereo Analog Amplifier Right Loop-Through Phase Indication Output 14 © 2 0 1 0 Woh le r Te c h n o l o g i e s , I n c . A l l r i g h t s r e s e r v e d .
