The 786 is the perfect partner for your microphone, providing you with two channels of audio purist
quality preamplification. The 786 delivers up to 70dB of sonically transparent gain to reveal the detail
and audio signature of even the most esoteric studio mics. It transforms their low level output signal to
a clean high level, high current output for direct connection to the line level inputs of your mixer, DAT
machine, sampler, or any other recording medium that accepts line level, analog input.
1. Bypassing a console’s preamp with the 786.
1. Mount the 786 in a 2U rack space. The 786 requires a two rack-space height and a standard
19 inch rack-space width. It can be mounted above or below anything that doesn’t obstruct
the vents of the 786. Ambient temperatures should not exceed 95°F (35°C) when equipment
is powered.
2. Make sure that AC power is not connected to your 786.
3. Connect your mic cables to the audio inputs of the 786.
4. Set the front panel of the 786 to the desired settings, including phantom power and Low-Z.
Connect the audio output of the 786 to the console’s LINE INPUT, and ensure that the con-
sole’s input selection switch is set to LINE, and the console’s gain control is set at its nominal
operating level (ie: +4dBu).
NOTE:
If you are using a mic with a separate power supply, such as a tube microphone, make sure that you are
not s48V phantom power from the 786 to the mic. Use the +48V Phantom Power switch on the 786
for all other microphones which require phantom power.
5. Turn the 786’s large
Gain control
counter-clockwise to the +15dB position, and the
Fine con-
trol
to 0dB, and apply power to the 786. Make sure your console’s gain slider is at approxi-
mately nominal level (“0dB”) and begin to slowly increase the gain of the 786 using the large
Gain control
. You should increase the gain until the recording device is operating at nominal
signal input level. Refer to Figure 2 below for hooking up the 786 to a console.
4
Connection
to your system
786
IN
OUT
Channel 1
MANUFACTURED UNDER THE FOLLOWING U.S. PATENTS:
4,368,425 5,282,252. OTHER PATENTS PENDING.
Power Supply, if required
Figure 2
:
Bypassing a console’s
mic pre with the 786
