BOTTOM OF CIRCUIT BOARD
INSTALLING THE NGM 1
STEP 1: Locating the Connector
INSTALLING THE NGM 1
STEP 2: Adjusting the Noise gate
INSTALLING THE NGM 1
STEP 3: Plugging-in the Noise Gate
The NGM 1 mounts on any “horizontal” accessory port
found inside every M & A series amplifiers.
A. Remove the two header jumpers and locate the missing
pin (“key”) on the port. Align the white stand-off with the
hole on the rear of the NGM 1 circuit board. Next, align the
blocked receptacle with the missing pin on the mounting
port. Press the NGM 1 onto the port and secure it to the
stand-off by applying downward pressure.
B. Turn amp on and audition the system. Adjust Threshold
and Release Time potentiometers to achieve the desired
results. See Step 2.
Note: The NGM 1 has been designed to allow the “piggy-
back” mounting of a second module via its “Auxiliary
Docking Port”. This function will work on all Xtant ampli-
fiers except on the M Series products. The M Series profile is
low to accommodate the height of a “stacked” module. Also,
when the NGM 1 is used in an M Series amplifier, its circuit
board covers the vertical accessory port eliminating its use.
A. Remove the NGM 1 from the packaging and
inspect the circuit board.
B. Locate the header connector soldered onto the
bottom of the circuit board. See illustrations 2
C. Turn the NGM 1 over and view the header con-
nector. Notice that one of the openings on the head-
er connector is blocked by white filler material. The
NGM 1’s mounting system utilizes this blocked
receptacle as the “key” to insure proper positioning
when installing the NGM 1 onto the amplifier’s
mounting port. See illustration 2.
A. The “Threshold” pot adjusts sensitivity to input
signal (voltage), the midrange frequency sensitivity is
predetermined. The threshold adjustment pot is part
of a closed loop monitoring circuit that listens to sig-
nals at the “input sensitivity range selector” (input
sensitivity jumper) only. Changes to the “input sensi-
tivity range selector” will affect noise gate adjust-
ment and operation. Any changes in signal level
upstream from the input sensitivity range selector
will affect the adjustment of the noise gate, such as
head unit volume level and source material. Output
gain pot adjustment or signal processing on the verti-
cal accessory port tower will not affect the threshold
adjustment.
B. The “Release Time” potentiometer adjusts the rate
or speed at which the noise gate will engage. A full
clockwise rotation will result in a 5 second delay
before the gate will actually close. Conversely, full
counterclockwise rotation will reduce the delay to .5
seconds.
HEADER CONNECTOR
LOCATING
“
KEY
”
illustration 1
THRESHOLD ADJUST
AUXILIARY
DOCKING
PORT
RELEASE TIME
