Kramer Electronics, Ltd.
Contents Contents 1 2 2.1 3 4 5 6 6.1 6.2 6.3 6.
Introduction 1 Introduction Welcome to Kramer Electronics! Since 1981, Kramer Electronics has been providing a world of unique, creative, and affordable solutions to the vast range of problems that confront the video, audio, presentation, and broadcasting professional on a daily basis. In recent years, we have redesigned and upgraded most of our line, making the best even better! Our 1,000-plus different models now appear in 11 groups1 that are clearly defined by function.
Getting Started 2.1 Quick Start This quick start chart summarizes the basic setup and operation steps.
Overview 3 Overview The VM-1120 is a high performance balanced stereo audio DA (distribution amplifier) using XLR connectors that includes: Front panel output level trimmer controls Active J-FET amplifying circuitry that ensures hum-free, fullbandwidth operation A high-power discrete buffering system providing excellent performance You can configure your VM-1120 as a mono DA (2x1:10 or 1:20) or as a stereo DA (2x1:5 or 1:10).
Your Balanced Stereo Audio Distributor Figure 1: VM-1120 1:10 Balanced Stereo Audio Distributor 4 KRAMER: SIMPLE CREATIVE TECHNOLOGY
Your Balanced Stereo Audio Distributor Table 1: Front Panel VM-1120 1:10 Balanced Stereo Audio Distributor Features 5 Feature Power LED 1:10 / 2x1:5 Button Level B and A Trimmers RIGHT LEFT # 1 2 3 4 1:10 / 2x1:5 Button Level B and A Trimmers Function Illuminates when the unit is powered on 1 2 Push in to select 2x1:5 , release to select 1:10 3 Adjusts the output signal level for OUTPUTS A and B 1 2 Push in to select 2x1:5 , release to select 1:10 3 Adjusts the output signal level for OUTPUTS A and B
Installing the VM-1120 in a Rack 5 Installing the VM-1120 in a Rack This section describes how to install the VM-1120 in a rack.
Connecting Your Balanced Stereo Audio Distributor 6.1 Connecting a 1:20 Mono DA To configure a 1:20 mono DA, as illustrated in Figure 2, do the following: 1. Connect a source (for example, an audio player1) to LEFT INPUT A and RIGHT INPUT A. 2. Connect up to 20 mono audio acceptors (for example, mono audio recorders) to any of the OUTPUT connectors. 3. Release the LEFT and RIGHT selector buttons 1:10/2x1:5 to select 1:10. 4. Connect the power cord to the electricity supply. 5. Switch on the VM-1120.
Connecting Your Balanced Stereo Audio Distributor 6.2 Connecting a 2x1:10 Mono DA To configure a 2x1:10 mono DA, as illustrated in Figure 3, do the following: 1. Connect mono audio source (for example, a mono audio player A) to LEFT INPUT A. 2. Connect up to 10 mono audio acceptors (for example, mono audio recorders 1A to 10A) to any of the LEFT OUTPUT connectors. 3. Connect mono audio source (for example, a mono audio player B) to RIGHT INPUT A. 4.
Connecting Your Balanced Stereo Audio Distributor 6.3 Connecting a 1:10 Stereo DA To configure a 1:20 stereo DA, as illustrated in Figure 4, do the following: 1. Connect a stereo audio source (for example, a stereo audio player) to LEFT INPUT A and RIGHT INPUT A. 2. Connect up to 10 stereo audio acceptors (for example, stereo audio recorders 1 to 10) to the LEFT and RIGHT channels of any of the OUTPUT connectors. 3. Release the LEFT and RIGHT selector buttons 1:10/2x1:5 to select 1:10. 4.
Connecting Your Balanced Stereo Audio Distributor 6.4 Connecting a 2x1:5 Stereo DA To configure a 2x1:5 stereo DA, as illustrated in Figure 5, do the following: 1. Connect a stereo audio source (for example, a stereo audio player A) to LEFT and RIGHT INPUT A. 2. Connect up to 5 stereo audio acceptors (for example, mono audio recorders 1A to 5A) to any of the LEFT and RIGHT A OUTPUT connectors. 3. Connect a stereo audio source (for example, a stereo audio player B) to LEFT and RIGHT INPUT B. 4.
Setting the VM-1120 7 Setting the VM-1120 Figure 6 illustrates how the selector button works when two inputs are connected to one channel. Figure 6: Using the Selector Button Note the following when using the VM-1120: The left and right channels are not connected. Left inputs only distribute to left outputs and right inputs only distribute to right outputs Only the “A” input can distribute to 10 outputs.
Technical Specifications 8 Technical Specifications The VM-1120 technical specifications are shown in Table 3: 1 Table 3: VM-1120 Technical Specifications INPUTS: OUTPUTS: MAX. OUTPUT LEVEL: BANDWIDTH (-3dB): S/N RATIO: CROSSTALK: CONTROLS: COUPLING: AUDIO THD + NOISE: AUDIO 2nd HARMONIC: POWER SOURCE: DIMENSIONS: WEIGHT: ACCESSORIES: 4 balanced audio +4dBu/50k on XLR (F) connectors 20 balanced audio +4dBu/50 on XLR (M) connectors >26dBu >100kHz 89.3dB -78dB Level (x4): -0.7dB to +5.
LIMITED WARRANTY Kramer Electronics (hereafter Kramer) warrants this product free from defects in material and workmanship under the following terms. HOW LONG IS THE WARRANTY Labor and parts are warranted for seven years from the date of the first customer purchase. WHO IS PROTECTED? Only the first purchase customer may enforce this warranty. WHAT IS COVERED AND WHAT IS NOT COVERED Except as below, this warranty covers all defects in material or workmanship in this product.
For the latest information on our products and a list of Kramer distributors, visit our Web site: www.kramerelectronics.com where updates to this user manual may be found. We welcome your questions, comments and feedback. Safety Warning: Disconnect the unit from the power supply before opening/servicing. Caution P/N: 2900- 001029 Rev: 3 Kramer Electronics, Ltd. Web site: www.kramerelectronics.com E-mail: info@kramerel.
