Xtant NGM 1 Owner's Manual

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