MODEL EJ-8 Multi-Input Adapter Box Solve Your Sound Connection Problems The Easy Way…
Table of Contents Controls and Functions (illustration) Controls and Functions (description) Basic Information Read this section for basic information on the EJ-8: what it includes, how it works, and what you need to use it. Using the EJ-8 with Audio Equipment Read this section for step-by-step instructions for using the EJ-8 in some common situations.
Controls & Functions 1. Stereo Input - accepts stereo line level audio signal input - 1 volt RMS to microphone. 2. Loudspeaker Level Input – accepts speaker level signals up to 10 volts RMS and provides a power load 10 ohms – 10 watts for lowest distortion noise. 3. Mono RCA, 1/8” Mini & ¼” Phone Auxiliary Line Level Inputs – accepts line level 1 volt RMS inputs – buffered inputs allow up to six different inputs at the same time. 4.
The EJ-8 Basic Information The EJ-8 is a multi-input adapter box that allows you to use one or more pieces of audio/visual equipment with the speakers and volume of an existing public address (P.A.) or sound system. Several audio devices can be used simultaneously.
This section explains how to use the EJ-8 to properly connect the following audio devices to a microphone input jack (connector) of a sound system.
5. Locate the output connector (jack) on the audio device. It may be labeled LINE OUT, AUXILIARY, AUX OUT, EARPHONES, EAR, EXT. SP., PHONO, etc. If the audio device is stereo, there may be two connectors: one for each channel. NOTE: The EJ-8 mixes the stereo signals and sends a balanced, mono signal to the sound system. Some audio devices have AUX or MIC inputs, so be sure to use output connectors. 6.
11. Try switching the EJ-8’s HUM switch (on the upper right corner of the EJ-8) back and forth. Set it in the position that produces the least amount of hum. Speaker Level Audio Devices Device Output labeled: SPEAKER OUT This section explains how to use the EJ-8 to connect the following audio devices to a microphone input jack (connector) of a sound system.
7. Check that the volume control on the EJ-8 is turned to MIN, then plug the other end of the patch cord into the jack on the EJ-8 labeled LOUDSPEAKER LEVEL INPUT. (To prevent distortion, the EJ-8’s loudspeaker connector provides a 10 ohm, 20 watt resistive load to the audio device). 8. Plug the XLR microphone connector (the connector on the thick black cord that comes out of the right side of the EJ-8) into the microphone input jack of the sound system. 9.
Troubleshooting All Audio Devices (Auxiliary Line Level or Loudspeaker) Symptom Corrective Procedure Hum-background noise Move HUM switch to the other position. Choose the position that produces the least hum. No sound Connection Problems Be sure that you are using both ends of the same patch cord. Cord and plug colors must match. In particular, if you used half of the paired RCA/Mini phone plug cable, be sure you used the same color plug on both ends.
1. Check that the sound system amplifier is on. 2. Check that the microphone volume control knob is on and set to a moderate level. 3. Speak into the microphone to test the sound system. At this point, the microphone should be working. If it isn’t, the sound system itself is not working as needed for proper functioning with the EJ-8. You will need someone to check and perhaps repair the sound system. If the microphone is working, continue with the following steps: 4.
Technical Information Model EJ-8 Multi-Input Adapter Box Specifications Inputs: Unbalanced Line Stereo phone, phone, mini phone, & “RCA” phono Speaker Level 1/4-inch phone plug Outputs: Transformer balanced low-impedence (100 ohms) adjustable mic level output on 3-foot cable with XLR type plug.
protection and transporting. Basic instructions and complete operations manual must be stored in the carrying case. The size must be 3 in. H x 6.6 in. L x 2.5 in. W and its weight shall be 1 lb.
Limited Warranty The Model EJ-8 is guaranteed for two years from date of original purchase against malfunction due to defects in workmanship and materials. If such malfunction occurs, unit will be repaired or replaced (at manufacturer’s option) without charge for materials or labor if delivered prepaid to the factory. Unit will be returned prepaid.
