NHT Evolution System - Manual (Page 42)

9.0 A1 Monaural Amplifier
9.1 Design
The A1 is a full range (20Hz - 20kHz) audio
power amplifier. It provides RCA and XLR
inputs for connection with all types of receivers
or separate audio components. The A1 is a sin-
gle channel or monaural amplifier and can be
used with Evolution subwoofer and tower prod-
ucts or to power individual Evolution monitors.
The A1 is a Class G design, which operates at
lower temperatures than other amplifier classes
and is typically more efficient. The A1 offers the
wide dynamic range and low distortion typical of
more conventional class AB designs.
9.2 Placement
The A1 amplifier may be placed on a shelf, or in
a standard 19" equipment rack using the option-
al rack ears and hardware. See instructions on
rack mounting below.
Ideally, the A1 should be placed in close prox-
imity to the receiver or surround processor.
Minimizing cable lengths reduces the chance of
noise contamination. If long runs (more than
20’) of signal cable are required we recommend
using the balanced (XLR) input on the amplifier.
9.3 Rack Mounting the A1 and or X1
You may need assistance to hold the A1 or X1
in place while mounting them to the rack.
Note: When rack mounting, we recommend you
leave at least one rack space between compo-
nents (particularly amplifiers) for proper cooling.
Step One: Remove the
two screws on each
side of the X1 or A1 with
the #2 Phillips screw-
driver.
Step Two: Position
the rack ears over
the threaded holes.
Replace the two
screws and tighten
both securely.
Step Three: Arrange the
mounting screws included
with the rack ears and the
plastic insulating washers
as shown.
Step Four: Start all four
bolts, then tighten secure-
ly.