Related Manuals for Aphex 188
Summary of Contents for Aphex 188
- Page 1 Remote Controlled 8 Channel Microphone Preampli er Instruction Manual P/N 188-3200 Preliminary Rev 1 Released 01/23/09 Manufactured by Aphex 3500 N San Fernando Blvd Burbank, CA 91505 Copyright 2009 Aphex. All rights reserved. Aphex Model 188 Page 1...
- Page 2 The user is cautioned that changes and modifications made to the equipment without approval of the manufacturer could void the user’s authority to operate this equipment. It is suggested that the user use only shielded and grounded cables to ensure compliance with FCC Rules. Aphex Model 188 Page 2...
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Page 3: Table Of Contents
Table of Contents 1.Introduction 2.Quick Start Front Panel LCD Display and Rotary Encoder/Switch Front Panel Screens 3. Rear Panel 4. Model 188 block diagram and signal flow 5. Installation 6. Functions in Detail Aphex Model 188 Page 3... -
Page 4: Introduction
500Ω. The sonic e ects are reduced frequency and transient response, and higher noise. The increase in audio quality when the microphone is driving an ideal load is dramatic. The 188 acts like an active splitter with one analog and two digital outputs.. -
Page 5: Quick Start
The first screen shows the firmware version that is loaded into the Model 188. It is a good idea to check the Aphex website occasion - ally to see if there are any updates. Updating the firmware is cov -... - Page 6 Channel number, gain, status for Polarity Reverse, Pad, Low Cut Filter, and Phantom Power functions. A check mark under the function indicates that it is active. A dash indicates that it is not active. The Input Gain is adjustable from 26 to 65dB. Aphex Model 188 Page 6...
- Page 7 (44.1, 48, SMUX 44.1, SMUX 48, SMUX 88.2 or SMUX 96kHz). The rate that is selected will appear on the Word Clock output. If the source is set to External, the sample rate will appear in the screen if there is a valid clock input. Aphex Model 188 Page 7...
- Page 8 IP is selected. The fixed IP addresses range from 192.168.1.64 for Net Number 001 to 192.168.1.192 for Net Number 128. If these addresses are not compatible with your network, please contact Aphex. Note: Power must be cycled o and on to commit these changes.
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Page 9: Rear Panel
8) when SMUX is not selected. When SMUX is selected ADAT Output 1 will have audio channels 1, 2, 3 and 4; and ADAT Output 2 will have audio channels 5, 6, 7 and 8. Aphex Model 188 Page 9... - Page 10 Standard RJ-45 connector for Ethernet remote control as well as for future downloads of firmware. POWER Standard IEC receptacle. The Model 188 has a switch mode power supply which can accept any voltage from 90 to 260VAC and at either 50 or 60Hz. GROUND LUG Provides solid grounding point.
- Page 11 Simplifi ed Block Diagram Signal Flow The microphone signal enters the Model 188 through the female XLR, through a switch for the Pad (-26dB), the mic pre front end including the transformer with 26dB of gain and the low cut fi lter, polarity reverse, through the variable gain amplifi er (0 to 39dB of gain), to the A/D converter and the output stage.
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Page 12: Installation
The Model 188 occupies 1RU (45mm or 1.75 inches) of a standard EIA equipment rack. Allow at least an additional 3” to 4” of depth for connectors. Place the Model 188 in the desired rack space and secure with the cushioned rack screws or equivalent hardware. Don’t position the Model 188 directly above power amplifiers or power supplies that produce strong hum fields... - Page 13 Ground loops hardly ever cause problems within the 188 since it was designed with high immunity. However, other equipment connected to the 188 may experience hum and noise from a ground loop. Ground loops can occur when various interconnected equipment is powered from separate AC circuits that are fed from opposite phases of the power feeder.
- Page 14 4. At the end of a successful 188 download, the computer screen will show the message: “End of Load”. 5. Cycle the 188’s power o and on. Verify that the new firmware version is now shown at the bottom right of the LCD screen..
- Page 15 CHANGING THE PRE/POST SETTING Remove the top cover and locate the jumper for each preamp behind the DB-25 connector.. Move the jumper to the appropriate position. Enlarged image with jumpers on Post for channels 7 and 8 Page 15 Aphex Model 188...
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Page 16: Functions In Detail
10dB. Even a 3dB step, up or down, in a microphone preamp will cause an audible click or pop when it is changed. The Aphex 1788A and the 188 use di erent but equally e ective circuitry to eliminate pops and clicks and zipper noise. This is especially appreciable when you have to roll through a gain change of 6dB or more very quickly. - Page 17 ADAT or SMUX by rotating the encoder to the desired format and pressing the encoder to select. Note: When 44.1 or 48kHz is selected with SMUX format, the e ective sampling rate will be double (88.2 or 96kHz). Page 17 Aphex Model 188...
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Page 18: Limited Warranty
EXCLUSION OF CERTAIN DAMAGES Aphex Systems’ liability for any defective unit is limited to the repair or replacement of said unit, at our option, and shall not include damages of any other kind, whether incidental, consequential, or otherwise.
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