Nxg VM80 User manual

Thank you for purchasing the NX-VM80 Impedance Matching Volume
Control. The NX-VM80 is a high quality auto-former design which will
enable you to connect up to 16 pairs of 8 ohm speakers to an 8 ohm sta-
ble amplifier. Or up to 32 pairs of 8 ohm speakers to a 4 ohm stable ampli-
fier and operate them simultaneously without the fear of amplifier overload.
Wiring and Installation
First determine the minimum operating impedance of the amplifier to be
used in your installation. This information should be in your amplifier
owner’s manual. Using the chart below choose the proper position for the
impedance matching switch (see Fig. 1) and put switch in correct position.
Wiring Instructions (Fig. 2)
The NX-VM80 has detachable connector blocks to which
the amplifier and speaker wires should be connected.
When connecting the speaker leads from the amplifier
outputs to the volume control blue input connector block,
strip about an 1/8 inch of insulation from the wire and
twist or solder it so that there are no loose strands. Insert
the wires from the amplifiers outputs into the volume
control connector block inputs. Note: Wires should stay
consistent right + from the amplifier to right + on the input
side of the connecting block. Most speaker wire has some
formof identification such as raised ribs or color coding to
help determine positive and negative connections.
Connect the speakers to the blackoutput connector block
following the same format as above. When the wires are
connected to blocks, plug them back into the volume
control input and outputs. Do not apply undue pressure
while plugging it into the socket. Make sure the plug is
engaged in the socket properly and is not loose.
Caution: Do not reverse the input and output connec-
tions or serious damage may occur to your amplifier.
Fig. 2
NX-VM80 Impedance Matching Volume Control
Recommended Switch Position 8 ohm Stable Amplifier.
Connecting 2 Pairs of 8 ohm Speakers
Connecting 3-4 Pairs of 8 ohm Speakers
Connecting 5-8 Pairs of 8 ohm Speakers
Connecting 9-16 Pairs of 8 ohm Speakers
2X Position
4X Position
8X Position
16X Position
Recommended Switch Position 4 ohm Stable Amplifier.
Connecting 2 Pairs of 8 ohm Speakers
Connecting 3-4 Pairs of 8 ohm Speakers
Connecting 5-8 Pairs of 8 ohm Speakers
Connecting 9-16 Pairs of 8 ohm Speakers
Connecting 17-32 Pairs of 8 ohm Speakers
1X Position
2X Position
4X Position
8X Position
16X Position
8 ohm Speaker Chart
Recommended Switch Position 8 ohm Stable Amplifier.
Connecting 2 Pairs of 4 ohm Speakers
Connecting 3-4 Pairs of 4 ohm Speakers
Connecting 5-8 Pairs of 4 ohm Speakers
4X Position
8X Position
16X Position
4ohm Speaker Chart
Recommended Switch Position 4 ohm Stable Amplifier.
Connecting 2 Pairs of 4 ohm Speakers
Connecting 3-4 Pairs of 4 ohm Speakers
Connecting 5-8 Pairs of 4 ohm Speakers
Connecting 9-16 Pairs of 4 ohm Speakers
2X Position
4X Position
8X Position
16X Position
Fig. 1
Speaker Wire
Connecting
Blocks

One-Year Limited Warranty
If this volume control proves to be defective in materials or workmanship within one year
from the date of the original customers purchase, we will, at our option, repair or replace the
defective product.
Disclaimer
The warranty stated herein is in lieu of all other warranties expressed or implied
including merchantability and fitness for particular purpose and all other liabilities and oblig-
ations of NXG Technology, all of which are expressly disclaimed. NXG Technology has not
made and does not hereby make any other representation, warranty or covenant with respect
to the condition, quality,durability,design, operation, capacity,fitness for use or suitability of
this volume control.
Exclusion of Certain Damages
NXG Technology’s liability for any defective product is limited to repair or replacement of the
product at our option. NXG Technology shall not be liable for incidental or consequential dam-
ages of any kind or character because of product defects. Some states do not allow limita-
tions on how long an implied warranty lasts and/or do not allow the exclusion or limitation of
incidental or consequential damages, so the above limitations and exclusions may not apply.
This Warranty Does Not Cover
Damage caused by abuse, accident, misuse, negligence or improper operation or installation.
Products that have been altered or modified. Any product whose serial number has been
altered, defaced or removed. Normal wear and maintenance. Damages caused by shipping
(All claims for shipping damages must be made with the carrier)
Warranty Service
All warranty repairs must be accompanied by the original bill of sale. No other document is
acceptable or required.
Mounting (Fig. 3)
Install the completed assembly into a single gang electrical work box, approximately 18 cubic inches or greater. An open
back electrical box or plaster ring may be more convenient to work with. The volume control insert and the decorative
plate are packed separately in the carton. Mount the NX-VM80 in the electrical box using the screws provided.
Note:Avoid mounting the NX-VM80 next to AC lines or dimmers.
Operational Check
After making all connections, check for proper operation. Switch the system to the ON position. Using either the television
or music,slowly increase the volume on the amplifier/receiver to mid position. Now, slowly advance the volume control
knob on the NX-VM80, clockwise from its minimum position towards its maximum position. You should hear sound ema-
nating from the speakers, increasing in volume as you rotate the volume control knob through its twelve steps. Select the
level of sound that is most pleasing to you. If no sound is heard from any or all speakers, switch the system OFF imme-
diately and check for open or loose connections, wrong polarity or shorts in the wires.
NXG Technology •16648 North 94th Street •Scottsdale, AZ 85260 •Phone: [phone]
Fig. 3