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DBX 786 Precision Mic Preamp The dbx Blue Series 786 is a two channel, solid state, precision microphone preamp housed in a 2 space rack. It features a blue front panel machined from 1/4" aircraft-grade aluminum, hand-crafted aluminum knobs, LED's mounted individually in machined stainless steel housings, custom VU meters with peak indicators, all in a heavy gauge chassis. It is referred to as "precision" since it's designed philosophy is to provide the truest reproduction of the microphone source as is electronically possible - as opposed to preamps that add color the signal. The 786 features +48V phantom power, 20 dB pad, phase invert functions, and includes a switchable "super low Z" setting, which optimizes the unit for microphones with very low source impedance. An 11 position coarse gain switch sets the gain between +10 and +60dB, while the fine gain control varies between -3 and +3dB. Levels may be monitored on peak-program VU meters with adjustable reference levels. "Spectrum", a unique variable high-frequency equalization circuit employed in the preamp, enhances the high frequency spectral content of the signal, while maintaining phase integrity. The "Detail" control varies the amount of high frequency shelving boost at the frequency determined by the "Spectrum" control. The combination of the "Spectrum" and "Detail" controls allow pristine high frequency equalization adjustments without the added "hash" of traditional high-frequency EQ topologies. The signal path of the 786 consists of a transformer-coupled, discrete-design input stage utilizing the proprietary dbx M8' mic preamp module. The "minimum signal path design" routes the amplified signal directly to a patented high output drive circuit. Each stage throughout the preamp is "small-signal square wave compensated" to assure precise phase alignment at all audio frequencies. The output stages are patented high precision, high-drive, transformer-coupled, capable of performing with incredible accuracy and sonic transparency in virtually any audio environment. With the supplied 704X dbx TYPE IV A/D Conversion System digital output board, the user can capture the essence of the pristine signal path directly into the digital world, without the need of additional digital converters. The digital output communicates in either AES/EBU or S/PDIF at up to 16, 20 or 24-bit word lengths and with up to 96kHz sampling frequency. In addition, TYPE IV conversion offers the ability to select noise shape algorithms and dither types that best suit the music and medium. Features: 130dB of Dynamic Range High-Drive output transformer circuit drives 1000 ft. of Belden® cable at +30dBu with only .007% THD +48V Phantom Power, Phase Reverse, -20dB Input Pad Super Low-Z input switch for low impedance microphones or altering the microphone's sonic character Proprietary High Frequency EQ circuit with cut/boost to 40kHz
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