Amplifier Tech SUM100 Stereo Amplifier User Manual


 
Audio Technologies Inc. | 154 Cooper Road #902 | West Berlin, NJ 08091 | Voice 856-719-9900 | Fax 856-719-9903 | www.
audio.com
company inspect the unit and the box at your location. Count the pieces! Don't
throw out the boxes and packing material until you are sure you have everything
that is coming to you. The amplifiers need either their own separately ordered
WA100 power supply or a DC cable, P/N20602-1 to share the supply of another
amplifier.
Rack and desk mounting hardware may be packed in with the unit even though
ordered separately. Wall mount power supplies must be ordered separately but
may either be included with the unit or shipped in their own box.
MOUNTING
Single desk mounting kits consist of a pair of angled base plates that mount
under the lower front and rear cover screws of a single unit, to raise and to tilt it
for easy use. In addition, one or more sets of vertical stacking plates, mounting to
the upper front and rear cover screws of the bottom unit, allow multiple units to
be stacked. Several units can be desk mounted side-by-side and even stacked
side-by-side using horizontal joiner kits together with mounting base and stacker
kits. P/N20617-501 is the angled base kit. P/N20617-502 is the base plus one
stacker kit (two high). P/N20617-503 is the base plus two stackers (three high).
P/N20617-504 is the stacker kit by itself and P/N20604-504 is a horizontal joiner
kit.
Rack mount system 21075-501 mounts three units in one rack.
WIRING
AUDIO CONNECTIONS
Balanced XLR type inputs and outputs are wired per figure 1 with pins 2 as HI
and pins 3 as LOW. Pin 1 is the cable shield and ground connection. Pin 1 is
grounded as shipped but may be floated to interrupt a hum producing ground
loop by opening the unit and clipping out the GND LIFT jumpers. Unbalanced
lines use pin 2 as HI and ground pins 3 and 1.
Active balanced outputs and inputs require a reference ground connection to the
source or receiving device for proper operation. This ground can be provided by
the rack frame or a studio buss connection if it is not carried through by the
output cable shield.
GROUNDING
Operation in high RF broadcast environments requires special attention to
grounding and shielding. The chassis must be grounded directly to a good, low
impedance studio ground system. Input and output connections must be properly