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AMP1A Series
AMP1A AMP1A-2S AMP1A-LP AMP1A-LP2S
1U Stereo Audio Speaker Monitors
with Two or Optional Four Analog Audio Inputs,
Stereo Analog Outputs, and Optional Dual
10-Segment Level Meters and Phase Indication
Title and Contents ...........................................................
Introduction .......................................................................................
Description and Features ......................................................................
Applications, General Specifications, and Other Options ......................
Section 2: Operation .......................................................
Installation ............................................................................................
Front Panel Features .............................................................................
Rear Panel Features ...............................................................................
Audio Amplifier and Speaker Configuration .......................................
Balance Control Characteristics ...........................................................
Section 3: Technical Information .......................................
General Technical Observations ..........................................................
Level Meter Gain Calibration and Display Mode Settings ....................
Bargraph Driver Circuit Description (919234) .....................................
Level Meter Specifications ..................................................................
Interconnect Block Diagrams ..............................................................
© 2006 Wohler Technologies Inc. ALL rights reserved
(Document P/N 821526, Rev-D)
User Manual
CONTENTS
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Summary of Contents for Wohler AMP1A
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Page 1: Table Of Contents
Section 3: Technical Information ........General Technical Observations ............Level Meter Gain Calibration and Display Mode Settings ....Bargraph Driver Circuit Description (919234) ........Level Meter Specifications ..............Interconnect Block Diagrams .............. © 2006 Wohler Technologies Inc. ALL rights reserved... -
Page 2: Introduction
Introduction Congratulations on your selection of a Wohler Technologies product. We are confident it represents the best performance and value available, and we guarantee your satisfaction with it. If you have questions or comments you may contact us at: Wohler Technologies, Inc. -
Page 3: Section 1: General Features And Specifications
AMP1A/-2S/-LP/-LP2S User Manual, P/N 821526, Rev-D Section 1 General Features and Specifications Description Features Applications General Specifications Other Options © 2006 Wohler Technologies Inc. ALL rights reserved... -
Page 4: Description And Features
The AMP1A and AMP1A-LP models feature one pair of balanced XLR inputs and a pair of unbalanced RCA inputs with one pair of XLR loop-through connectors for connecting to downstream equipment. -
Page 5: Applications, General Specifications, And Other Options
The AMP1A Series is 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. Designed and manufactured in the U.S., the AMP1A Series is backed by a strong warranty and a satisfaction guaranteed return policy. - Page 6 AMP1A/-2S/-LP/-LP2S User Manual, P/N 821526, Rev-D Section 1: General Features and Specifications (This page left intentionally blank) © 2006 Wohler Technologies Inc. ALL rights reserved...
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Page 7: Section 2: Operation
AMP1A/-2S/-LP/-LP2S User Manual, P/N 821526, Rev-D Section 2 Operation Installation Front Panel Features Rear Panel Features © 2006 Wohler Technologies Inc. ALL rights reserved... - Page 8 AMP1A/-2S/-LP/-LP2S User Manual, P/N 821526, Rev-D Section 2: Operation (This page left intentionally blank) © 2006 Wohler Technologies Inc. ALL rights reserved...
- Page 9 Connection of the audio feeds is straightforward. Please refer to the system interconnect block diagram on pages 19 and 20 for clarification of the general signal paths into and out of the AMP1A series units. XLR inputs are 200K Ω, balanced. RCA phono inputs are 40K Ω, unbalanced. Care should be exercised to avoid mismatched cable types and other similar causes of undesired reflections in RF signal systems.
- Page 10 Front Panel Features Please refer to Figure-2a on the following page to familiarize yourself with the front panel features of the AMP1A Series units covered by this manual. The following sections describe these functions and are referenced, by number, to Figure-2a.
- Page 11 AMP1A/-2S/-LP/-LP2S User Manual, P/N 821526, Rev-D Section 2: Operation Figure-2a: Front Panel Features © 2006 Wohler Technologies Inc. ALL rights reserved...
- Page 12 Rear Panel Features Please refer to Figure-2b on the following page to familiarize yourself with the rear panel features of the AMP1A Series units covered by this manual. The following sections describe these features and are referenced, by letter, to Figure-2b.
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Page 13: Rear Panel
BALANCED IN SOURCE 2 CH B(R) CH A(L) SEL. OUT CH A(L) AMP1A-2S and AMP1A and AMP1A-LP2S AMP1A-LP Rear Panel. Rear Panel. SEL. OUT CH B(R) CH B(R) Figure-2b: Rear Panel Features © 2006 Wohler Technologies Inc. ALL rights reserved... -
Page 14: Audio Amplifier And Speaker Configuration
The converse of the above is true if the balance control is rotated to the right. See the simplified diagram above for placement of the balance control in the audio amplifier circuit. © 2006 Wohler Technologies Inc. ALL rights reserved... -
Page 15: Section 3: Technical Information
Section 3 Technical Information • General Technical Observations • Level Meter Gain Calibration and Display Mode Settings • Level Meter Bargraph Driver Circuit Description (919017) • Level Meter Specifications • Interconnect Block Diagrams © 2006 Wohler Technologies Inc. ALL rights reserved... -
Page 16: General Technical Observations
(common) OR THE GROUNDED LEAD OF ANY TEST EQUIPMENT so as not to short out the power amps. The side speaker outputs are single-ended, so these precautions are not necessary for them. © 2006 Wohler Technologies Inc. ALL rights reserved... -
Page 17: Level Meter Gain Calibration And Display Mode Settings
The Meter Input Gain Calibration/Bargraph Display Mode DIP modules are accessible through openings in the top cover of the unit. Any adjusments to the DIP switch modules should be performed before installing the unit into an enclosed rack. © 2006 Wohler Technologies Inc. ALL rights reserved... -
Page 18: Bargraph Driver Circuit Description (919234)
Segment Brightness, (I f = 20 mA): 5.5 mcd Segment Brightness, Uniformity: <8% difference between segments Adjacent Segment "Off" Brightness: <1% of brightness of active segment Peak Emission Wavelength: green: 570 nm red: 630 nm © 2006 Wohler Technologies Inc. ALL rights reserved... -
Page 19: Interconnect Block Diagrams
AMP1A/-2S/-LP/-LP2S User Manual, P/N 821526, Rev-D Section 3: Technical Information © 2006 Wohler Technologies Inc. ALL rights reserved... - Page 20 AMP1A/-2S/-LP/-LP2S User Manual, P/N 821526, Rev-D Section 3: Technical Information © 2006 Wohler Technologies Inc. ALL rights reserved...
- Page 21 AMP1A/-2S/-LP/-LP2S User Manual, P/N 821526, Rev-D Appendix A: PCB Layouts and Schematics Notes: © 2006 Wohler Technologies Inc. ALL rights reserved...
- Page 22 Technologies, Inc. Phone: (510) 589-5676 31055 Huntwood Avenue Fax: (510) 870-0811 Hayward, CA 94544 US Toll-Free: 1-888-596-4537 Phone: (510) 870-0810 web: www.wohler.com Fax: (510) 870-0811 e-mail: support@wohler.com US Toll-Free: 1-888-596-4537 www.wohler.com support@wohler.com © 2006 Wohler Technologies Inc. ALL rights reserved...
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