AMP1-DA/106 1RU Audio Speaker Monitor User Guide Part Number 821024, Revision B
© 2011 Wohler Technologies, Inc. All rights reserved. This publication is protected by federal copyright law. No part of this publication may be copied or distributed, stored in a retrieval system, or translated into any human or computer language in any form or by any means electronic, mechanical, manual, magnetic, or otherwise, or disclosed to third parties without the express written permission of Wohler Technologies. Reproduction Licensed users and authorized distributors of Wohler Technologies, Inc.
AMP1-DA/106 User Guide Introduction Overview The AMP1-DA/106 audio monitor provides self-powered, full-fidelity stereo monitoring in the smallest rack space possible. All models contain four high performance transducers driven by three power amplifiers: two amplifier/driver combinations handle midrange and high frequency information in stereo, while the third center channel reproduces information below the 500 Hz crossover point.
AMP1-DA/106 User Guide 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.
AMP1-DA/106 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. Heat Dissipation The ambient temperature inside the mounting enclosure should not exceed 40° Celsius (104° Fahrenheit). Adjacent devices can be rack mounted (or stacked) in proximity to the unit if the above temperature is not exceeded. Allow a 1RU (1.75”/44.
AMP1-DA/106 User Guide FCC Compliance FCC Compliance This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment.
AMP1-DA/106 User Guide Features Features • 98 dB SPL at two feet • Only one rack space high • Thorough magnetic shielding for placement next to video monitors • Two selectable AES/EBU inputs on unbalanced BNC connectors • Analog stereo inputs on two balanced XLR connectors • Analog output of selected input on two balanced XLR connectors • AES input signal status indication LED • AES source selection via front panel toggle switch • Digital/analog source selection via front panel toggle switch • Headphone ou
AMP1-DA/106 User Guide S p e c if i c a ti o n s systems, satellite links and cable TV facilities, and on-air radio studios. Designed and manufactured in the U.S., the AMP1-DA/106 is backed by a strong warranty and a satisfaction guaranteed return policy. Specifications Table 1–1 Specifications for the AMP1-DA/106 Specification Inputs Input Impedance Input Level for Maximum Output (Volume Full On) Input Overload Peak Acoustic Output (@ 2 ft.
AMP1-DA/106 User Guide S p e ci f i c a t i o n s Table 1–1 Specifications for the AMP1-DA/106 Specification D to A Gain Calibration, (dB = dBFS) AES Sampling Rate D to A Converter Converted Analog Out (S/ N) Converted Analog Out (THD) AES Termination Level Meter Type Bargraph Quantity LED Color Metering Range Reference Level Select Display Mode Select Peak Hold Select PPM Ballistics Select Calibration Scale Select Level Meter Type Level Calibration Frequency Response LED Color Metering Scale Midscale R
AMP1-DA/106 User Guide Other Options Table 1–1 Specifications for the AMP1-DA/106 Specification Adjacent Segment “Off” Brightness Peak Emission Wavelength Value <1% of brightness of active segment green: 570 nm; red: 630 nm Other Options Wohler Technologies offers the broadest range of standard production audio monitor units.
AMP1-DA/106 User Guide A u d i o Am p li f ie r a n d S p e a k e r C o n f i g u r a t i o n midrange and high frequency information in the left and right (stereo) speaker channels, while the third amplifier channel sums the left and right channel information below the 500 Hz crossover point in the woofer (bass) speaker(s). Note that the woofer channel is not a dedicated LFE or center channel.
AMP1-DA/106 User Guide Front Panel Controls Front Panel Controls Figure 1–2 AMP1-DA/106 Front Panel Balance Power Volume Level Meters AES Indication AES Select Analog/Digital Select Headphones Brightness Speakers • Speakers: The AMP1-DA/106 speaker system is comprised of two mid-range tweeter speakers (left and right) and two woofer speakers (left and right).
AMP1-DA/106 User Guide Rear Panel Connectors • Analog/Digital Source Select Switch: When this toggle switch is set to analog, the unit will monitor the analog input signals from the Analog In XLR connectors on the rear panel. When this toggle switch is set to Digital, the unit will monitor the selected AES/EBU In input (In 1 or In 2) on the rear panel. • Volume Control: This controls the loudness of the audio reproduced by the internal speakers or connected headphone.
AMP1-DA/106 User Guide R e a r P a n e l C o n n e ct o r s • AES/EBU Input Termination and AES Error Fault Type DIP Switches: • AES Input Termination: In the event that either of the AES input channels is connected to downstream equipment, set the appropriate switch to the up position (unterminated). If no downstream equipment is connected, then set to the down position (terminated). See Figure 1–4 below termination settings.
AMP1-DA/106 User Guide Rear Panel Connectors • AES/EBU In (In 1 and In 2): These two female BNC input connectors (In 1 and In 2) accept standard AES/EBU signals. These connectors are configured for unbalanced, 75 connections. Only one of the two AES/ EBU inputs may be monitored at a time. Use the Digital Source Select Switch on the front panel to select between AES/EBU inputs In 1 and In 2.
AMP1-DA/106 User Guide R e a r P a n e l 6 -P o s it i o n DI P S e tt i n g s f o r t h e Le v e l M e t e r s Figure 1–7 XLR (Male and Female) Pin-Outs) Female Male • Level Meter Calibration, Display Mode, and Reference Level DIP Switch: This DIP switch sets the Line Level (Auto) Calibration feature, the Display Mode, and the Reference Level for the Audio Level Meters. Note: An internal DIP switch sets the Peak Hold, PPM Ballistics, and Alternative Scales.
AMP1-DA/106 User Guide R e a r P a n e l 6 -P o s it i o n D IP S et ti n g s f o r t h e L e v e l M e t e r s Figure 1–8 Note: AMP1-DA/106 Rear Panel DIP Switch Settigns For more accurate indication of signal levels, meters are tuned to effect a “rounding” function, which occurs between the thresholds of any two bargraph segments. This means the level meter zero LED segment will turn on at one-half the smallest spacing between LED segments (mid-scale resolution) before that segment's scale indication.
AMP1-DA/106 User Guide R e a r P a n e l 1 0 -P o s it i o n D IP S ett i n g s f o r t h e L e v e l M e t e r s 7. Only one auto-calibration attempt may be made for each cycling of AC power to the unit. Once the Line Level Calibration DIP switch has been placed in the CAL position, it is necessary to cycle the power before that DIP switch will be functional again, even if a calibration attempt was unsuccessful.
AMP1-DA/106 User Guide R e a r P a n e l 1 0 -P o s it i o n D IP S et ti n g s f o r t h e L e v e l M e t e r s position rear panel DIP switch is located). See page*** for a diagram of the PCB and the DIP switch location. Figure 1–9 Internal 10-Position DIP Switch Settings Switch positions 1 and 10 are not used and should be left at the factory set position.
AMP1-DA/106 User Guide R e a r P a n e l 1 0 -P o s it i o n D IP S ett i n g s f o r t h e L e v e l M e t e r s Figure 1–10 18 821024: DIP Switch Locations A M P 1 - D A / 1 0 6 U s er G u i d e © 2 0 1 1 Wo h l e r Tec h n o l o g i e s , I n c. A l l r i g h t s r e s er ve d .
AMP1-DA/106 User Guide R e a r P a n e l 1 0 -P o s it i o n D IP S et ti n g s f o r t h e L e v e l M e t e r s PPM Characteristics (Ballistics) The PPM characteristics determine the Integration Time (rise time) and Return Time (fall time) of the level meter. The Integration Time is the time it takes for the lighted segments of the level meter, after application of a 5 Khz tone at a certain reference level, to rise within a specified number of dB of that level.
AMP1-DA/106 User Guide R e a r P a n e l 1 0 -P o s it i o n D IP S ett i n g s f o r t h e L e v e l M e t e r s Figure 1–11 Phase Correlation Positive amounts of correlation are indicated by an ascending amber bar in the lower (right channel) bar graph; negative correlation is shown when a redbar ascends in the top (left channel) bar graph.
AMP1-DA/106 User Guide T e c h n i c a l F u n c t i o n a l O v e r vi e w Figure 1–12 106-Segment Alternate Scales Technical Functional Overview Figure 1–13 below illustrates the overall functionality of the AMP1-DA/106. Figure 1–13 AMP1-DA/106 Block Diagram 821024: AMP1-DA/106 User Guide © 2 0 1 1 Woh l er Te c h n o l o g i es , I n c . A ll r i g h t s r e se r ve d .
AMP1-DA/106 User Guide Technical Functional Overview 22 821024: A M P 1 - D A / 1 0 6 U s er G u i d e © 2 0 1 1 Wo h l e r Tec h n o l o g i e s , I n c. A l l r i g h t s r e s er ve d .
