IMPORTANT NOTICEThis manual contains valuable information you will need to install and use the 1788A.A separate remote control manual has
Page 10MICROPHONE PREAMPLIFIERPage 11Instruction Manual3. INSTALLATION3. INSTALLATION3.1 UNPACKING AND INSPECTINGYour Aphex product was carefully insp
Page 10MICROPHONE PREAMPLIFIERPage 11Instruction Manual3. INSTALLATIONGround LoopsGround loops hardly ever cause problems within the 1788A since it wa
Page 12MICROPHONE PREAMPLIFIERPage 13Instruction Manual3. INSTALLATIONThis connector pinout matches the Tascam Analog DB-25 connector that has also be
Page 12MICROPHONE PREAMPLIFIERPage 13Instruction Manual3. INSTALLATION3.9 COM PORTThis is a standard RS-232 Com Port that runs at a fixed 9600 Baud. I
Page 14MICROPHONE PREAMPLIFIERPage 15Instruction Manual4. FUNCTIONS IN DETAILEXAMPLE OF USING PRE MODEThe FOH position has control over the 1788A’s bu
Page 14MICROPHONE PREAMPLIFIERPage 15Instruction Manual4. FUNCTIONS IN DETAIL4. FUNCTIONS in DETAIL4.1 LOCAL BLOCKChannel Select and Channel Status Re
Page 16MICROPHONE PREAMPLIFIERPage 17Instruction Manual4. FUNCTIONS IN DETAILNOTE: The gain does not move in 1dB steps. It ramps in small increments (
Page 16MICROPHONE PREAMPLIFIERPage 17Instruction Manual4. FUNCTIONS IN DETAILchannels is muted. The channel or channels that have been muted will flas
Page 18MICROPHONE PREAMPLIFIERPage 19Instruction Manual4. FUNCTIONS IN DETAILEnable LimiterEnabling the LIMITER engages the proprietary Micropho
Page 18MICROPHONE PREAMPLIFIERPage 19Instruction Manual4. FUNCTIONS IN DETAILOnce the Adjust/Store button is lighted, you are committed to a new stor
Page 2MICROPHONE PREAMPLIFIERPage 3Instruction ManualCONTENTSA MESSAGE FROM THE PRESIDENTDear Aphex Customer,Congratulations on your purchase of the M
Page 20MICROPHONE PREAMPLIFIERPage 21Instruction Manual4. FUNCTIONS IN DETAILLocal ControlThe LOCAL button allows front panel control. Press it once,
Page 20MICROPHONE PREAMPLIFIERPage 21Instruction Manual4. FUNCTIONS IN DETAILSample RateThe RATE button toggles through the three available sa
Page 22MICROPHONE PREAMPLIFIERPage 23Instruction Manual5. USING THE DIGITAL MODULEtypically is where you want to set your 0VU reference, or average op
Page 22MICROPHONE PREAMPLIFIERPage 23Instruction Manual5. USING THE DIGITAL MODULE5. USING THE DIGITAL MODULEWhen you have the 1788A’s digital audio o
Page 24MICROPHONE PREAMPLIFIERPage 25Instruction Manual5. USING THE DIGITAL MODULEBNC Clock I/OThe sync capability is made even more flexible by provi
Page 24MICROPHONE PREAMPLIFIERPage 25Instruction Manual5. USING THE DIGITAL MODULERemote Clock MasteringDepending on your system design, you may
Page 26MICROPHONE PREAMPLIFIERPage 27Instruction Manual5. USING THE DIGITAL MODULEVariationsAs you can see, clocking is usually pretty simple. Sometim
Page 26MICROPHONE PREAMPLIFIERPage 27Instruction Manual5. USING THE DIGITAL MODULEBRIEF TUTORIALBRUTE FORCE AND IMPEDANCE MATCHED TRANSMISSIONBACKGROU
Page 28MICROPHONE PREAMPLIFIERPage 29Instruction Manual6. TYPICAL OPERATION5.2 SENDING DIGITAL AUDIOThe digital module provides three simultaneous 8-c
Page 28MICROPHONE PREAMPLIFIERPage 29Instruction Manual6. TYPICAL OPERATION6. TYPICAL OPERATIONThis section suggest ways to get the most out
Page 2MICROPHONE PREAMPLIFIERPage 3Instruction ManualCONTENTS1. INTRODUCTION – 41.1 LOGICAL CONTROL BLOCKS — 41.2 PATENTED TECHNOLOGY — 41.3 SIG
Page 30MICROPHONE PREAMPLIFIERPage 31Instruction Manual6. TYPICAL OPERATIONNOTE: You may run into issues of balanced and unbalanced inserts. The 1788A
Page 30MICROPHONE PREAMPLIFIERPage 31Instruction Manual6. TYPICAL OPERATIONoptional digital module, you can use the AES/EBU DB-15 digital output, the
Page 32MICROPHONE PREAMPLIFIERPage 33Instruction Manual6. TYPICAL OPERATION6.4 USING THE MICROPHONE OUTPUT LIMITERMicrophone limiters traditionally
Page 32MICROPHONE PREAMPLIFIERPage 33Instruction Manual6. TYPICAL OPERATIONChanging the polarity of one or more mics will often clear up the problem.
Page 34MICROPHONE PREAMPLIFIERPage 35Instruction Manual8. SPECIFICATIONS7.2 SERVICE INFORMATIONIf it becomes necessary to return this unit for repair,
Page 34MICROPHONE PREAMPLIFIERPage 35Instruction Manual8. SPECIFICATIONS8.1 GENERAL SPECIFICATIONS8. SpecificationsANALOG OUTPUTSConnector:Type:Output
Page 36MICROPHONE PREAMPLIFIERPage 37Instruction ManualAPPENDIX A8.2 ARCHITECT’S SPECIFICATIONSBasic DescriptionA multichannel microphone preamplif
Page 36MICROPHONE PREAMPLIFIERPage 37Instruction ManualAPPENDIX Alines are the same. They both need two conductors. What makes a system unbalanced
Page 38MICROPHONE PREAMPLIFIERPage 39Instruction ManualAPPENDIX B & C1 illustrates how the hum is induced into both wires equally and therefore is
Page 38MICROPHONE PREAMPLIFIERPage 39Instruction ManualAPPENDIX B & Clem of a ground loop. First is to eliminate it from its source, and
Page 4MICROPHONE PREAMPLIFIERPage 5Instruction Manual1. INTRODUCTION1. INTRODUCTIONThe Aphex Model 1788A is a premium 8-channel remote contro
Page 40MICROPHONE PREAMPLIFIERPage 41Instruction ManualAPPENDIX DCONNECTOR WIRING STANDARDSThe 3 pin XLR, 1/4” (63.5 mm) TS mono phone and the 1/4” (6
Page 40MICROPHONE PREAMPLIFIERPage 41Instruction ManualAPPENDIX DA word on impedance and interfacing adapt-ers: If you are connecting betwe
Page 42MICROPHONE PREAMPLIFIERPage 43Instruction ManualAPPENDIX DPART 1: BALANCED OUT to BALANCED INOK for MicrophonesStandard store-bought cable. Shi
Page 42MICROPHONE PREAMPLIFIERPage 43Instruction ManualAPPENDIX DPART 2: BALANCED OUT to UNBALANCED INIt was mentioned that there are several types of
Page 44MICROPHONE PREAMPLIFIERPage 45Instruction ManualAPPENDIX EStereo PlugMale XLRFemale XLRDon’t Connect Pin 3Ground Shield This End OnlyGround Shi
Page 44MICROPHONE PREAMPLIFIERPage 45Instruction ManualAPPENDIX EAPPENDIX E: HELPFUL WIRING TABLEAlso see next page...Cross-CoupledBalanced(Aphex Serv
Page 46MICROPHONE PREAMPLIFIERPage 47Instruction ManualAPPENDIX FNOTESThe following notes are referenced in the text and in Table 2 on the preceding p
Page 46MICROPHONE PREAMPLIFIERPage 47Instruction ManualAPPENDIX FAPPENDIX F: WORD CLOCK CABLINGTransmission SystemsThere are basically two systems in
Page 48MICROPHONE PREAMPLIFIERPage 49Instruction ManualAPPENDIX Fnot terminated in its characteristic impedance. In most cas-es, unmatched word clock
Page 48MICROPHONE PREAMPLIFIERPage 49Instruction ManualAPPENDIX FNOTE ON CONVERTING TO A MATCHED LINE: because of the 1788A’s automatic inpu
Page 4MICROPHONE PREAMPLIFIERPage 5Instruction Manual1. INTRODUCTIONOptional Digital I/OWhen the optional digital audio output module is installed, th
Page 50MICROPHONE PREAMPLIFIERThis product is protected under one or more of the following Aphex patents.4,578,6484,633,5014,843,6264,939,4715,115,471
Page 6MICROPHONE PREAMPLIFIERPage 7Instruction Manual2. QUICK START1. CHANNEL SELECT buttons select one of eight channels for local control.2. C
Page 6MICROPHONE PREAMPLIFIERPage 7Instruction Manual2. QUICK STARTAUXOUTPUTCH 8MIC INLINE OUTCH 7MIC INCH 6MIC INCH 5MIC INCH 4MIC INCH 3MIC INCH 2MI
Page 8MICROPHONE PREAMPLIFIERPage 9Instruction Manual2. QUICK START2.3 GETTING UP & RUNNINGHere’s a step by step instruction on using the 1788A.
Page 8MICROPHONE PREAMPLIFIERPage 9Instruction Manual2. QUICK STARTto your equipment and that our MIcLim protection will indeed protect you from clipp
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