1788A
1788A Remote Controlled Mic Preamp
THE PROBLEM
Long mic level lines, mic splitters, and multiple inputs reduce the sensitivity of the microphone and change its frequency, phase and transient response. This performance degradation is the result of shifts in impedance, capacitance, and inductance values and is quite audible.
THE SOLUTION
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By placing the 1788A close to the mics and controlling it remotely the need for long mic level runs is eliminated.
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The noise picked up by long cable runs is no longer boosted at the end of the lines since the preamp gain has already been taken at the input of the line.
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By providing 5 outputs (3 digital & 2 analog) that are usable simultaneously the need for mic splitter boxes is eliminated.
Aphex Proprietary Technologies
MicLim™ is a patented limiter circuit at the mic input - a mic level limiter that speeds setup and makes the 1788 virtually crash-proof. MicLim allows you to set for maximum noise performance without having to back off for headroom, and eliminates the need for constant gain riding...plus fiber or digital systems can be driven at levels that yield maximum resolution without fear of overload.
LeNA™, the digitally controlled Low Noise Amplifier, allows the 1788's input gain to be adjusted without noise or glitches. This patented Aphex circuit changes level in 1/4 dB steps with 1dB stops. Other remote controlled preamps use relay switching with step sizes as high as 10dB. Even a step size of 1/4dB without LeNA will cause an audible click or pop that at high gains could be explosive!
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AUDIO |
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Frequency Response |
19Hz - 20 kHz (± 0.2dB) |
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Noise |
-125 dBu EIN |
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THD + N |
.003% @ +4dBu out |
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SMPTE IMD |
<.02% |
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DIM |
<.005% |
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Crosstalk |
<-96dB |
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MICROPHONE INPUTS |
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Connector |
8 x 3-PIN XLR Female |
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Type |
Jensen® Transformer coupled |
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Impedance |
Balanced, 1.6k ohms |
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Maximum Input Level |
+27 dBu (with 26dB pad engaged) |
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CMRR |
better than -99dB @ 60 Hz, -72 dB @10kHz |
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Phantom Power |
48 VDC on pins 2 and 3 |
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ANALOG OUTPUTS |
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Connector |
Main: (8) x XLR-3M; Aux: DB-25 (Tascam) |
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Type |
Main: Servo Balanced; Aux: Balanced |
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Impedance |
Balanced , 65 ohms |
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Maximum Output Level |
+27dBu |
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Test Tone |
700 Hz 0dBfs, -20dBfs |
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Headphones |
8-600 ohms recommended load impedance, mono or stereo |
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DIGITAL OUTPUTS (optional) |
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Connector |
AES/EBU: DB-15 Male
ADAT Optical:TOSLINK
T/DIF: DB-25 |
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Type |
Drift Stabilized 24 bit |
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Impedance |
75 ohms (AES/EBU) |
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Clock |
44.1, 48, or 96kHz Internal (or External) |
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Clock Connector |
BNC |
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REMOTE CONTROL |
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1788RC Hardware Remote |
Full remote control functions, full metering and preamp status;
Select one of 16 units, Create, Save, Edit, Recall up to 60 presets |
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1788SW Software
( W95/98/2000/XP Mac OS X®) |
(For Windows 95/98/2000/XP +Mac OS) Full remote control functions, Full metering and preamp status, Select one of 16 units, Create, Save, Edit, Recall up to 60 presets, Assignable up to 20 scenes |
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MIDI Controller |
MIDI command protocol for full remote control, metering, and status |
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Connection: |
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Remote to 1788 |
Ethernet, MIDI |
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Unit to unit linking |
Ethernet Hub |
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Remote Functions |
Input Gain, Main Out Gain, Aux Out Gain, Polarity, Mute, Low Cut Filter, Mute, Pad, Phantom Power, Sample Clock, Test Tone, Group Assign, Snapshot, Recall Presets |
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OTHER SPECIFICATIONS |
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Power requirements |
90-260 VAC 50-60 Hz 60 Watts |
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Dimensions |
19"W x 3.5"H x 13.58" D 2 Rack U (482.6mm x 88.9mm x 345mm) |
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Net Weight |
17 lbs (7.7 kg) |
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All specifications are subject to change without written notice |
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