|
The craftsmanship of the 786 is as stunning as the engineering is
innovative. A striking blue front panel machined from 1/4" aircraft
aluminum, hand-crafted solid aluminum knobs, LEDs mounted individually
in machined stainless steel housings, custom VU meters with peak
indicators, and heavy gauge chassis solidify the 786 as the benchmark
preamplifier for decades to come. The 786 combines the best
preamplifier features and an absolutely pristine audio path. In
addition to having +48V phantom power as well as a phase reverse
switch, the 786 also features a patent-pending EQ circuit called
"spectrum" with frequency cut and boost up to 40kHz. An 11-position
coarse gain switch sets the gain between +10 and +60 dB, while the fine
gain control varies between -3 and +3 dB. Levels may be monitored on
peak-program VU meters with adjustable reference levels. The signal
path consists of a transformer-coupled, discrete-design premium input
stage utilizing the proprietary dbx M8 Mic Pre-Amp Module.
"Spectrum", a unique variable high-frequency equalization circuit
employed in the mic pre-amp 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. Premium active electronics, precision 0.1% and 1% metal
film resistors, great sounding temperature stable polypropylene
capacitors, high-reliability board-to-board connectors with
gold-palladium-nickel contacts, Jensen® transformers, gold plated
Neutrik® XLRs, rare earth magnet relays with gold contacts in a
hermetically sealed nitrogen environment, military grade glass epoxy
circuit boards, to mention a few, contribute to the most
technologically advanced preamplifier in the world.
786 Features/Specifications
The dbx Blue Series Solid State Mic Pre-Amp is a 2U two-channel
precision mic pre companion product to the 160S Stereo
Compressor/Limiter. We refer to this as a "precision mic pre-amp" as it
is designed to provide the truest reproduction of the microphone source
as is electronically possible, as opposed to "FX" mic pre-amps. The
pre-amp features the ubiquitous +48V phantom power, 20 dB pad, and
phase invert functions, but also includes a switchable "super low Z"
setting which optimizes the pre-amp performance for microphones with
very low source impedance. An 11-position coarse gain switch sets the
gain between +10 and +60 dB, while the fine gain control varies between
-3 and +3 dB. Levels may be monitored on peak-program VU meters with
adjustable reference levels.
The signal path consists of a transformer-coupled, discrete-design
premium input stage utilizing the proprietary dbx M8' Mic Pre-Amp
Module. The minimum signal path design routes the amplified signal
directly to a patented high output drive circuit. Each stage throughout
the mic pre-amp is small-signal square wave compensated to assure
precise phase alignment at all audio frequencies.
Two output options will be available for the mic pre; an analog card
that parallels one extra high drive output per channel acting as a
premium signal splitter, and a dbx Type IV Conversion System' card that
provides proprietary analog-to-digital conversion for both channels
with both AES/EBU and S/PDIF outputs.
The dbx Blue Series Solid State Mic Pre has patented high-precision,
high-drive, transformer-coupled output stages capable of performing
with incredible accuracy and sonic transparency in virtually any audio
environment. The custom designed transformer, coupled with a discrete
distortion canceling driver circuit, is capable of driving 1000 feet of
Belden 8451 cable terminated with a 150 ohm load, while maximum drive
levels exceed +30 dBm. Yet this output stage exhibits remarkably low
distortion levels, immeasurable using standard audio test equipment.
- 130dB of Dyanmic 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 mircrophones or altering the microphone's sonic character
- Proprietary High Frequency EQ circuit with cut/boost to 40kHz
Specifications
Owner's
Manual [254K]
Cut
Sheet
[348K]
White
Paper [140K]
704X Digital
Output Card | 
