Overview: The Atlas Sound AA100PHD is a four-input, 100-watt
mixer-amplifier that is ideal for small to medium-sized retail, industrial, and
commercial businesses that use background music, distributed paging, and
music-on-hold. It can also be used for speech privacy systems. The amp can
accommodate a variety of input sources, and can power a 4Ω speaker load, or
25V and 70.7V commercial speaker systems.
Push Here Diagnostic: This AAPHD series mixer amp includes a
patent pending automatic system test to check the connected speaker lines for
wiring and impedance errors. The front panel Push Here Diagnostic (PHD) button
automatically verifies that the attached speakers' tap settings do not exceed
the amplifier's rated power, that no speakers are mistakenly tapped at 8Ω, and
the speaker wire is not shorted anywhere.
Inputs: The AA100PHD has four input channels with
independent level controls on the front panel:
- The Channel 1 input has a removable Phoenix (Euro
Block) connector with +, -, and G terminals for balanced microphone or line
level signals. DIP switches on the rear panel let you select mic or line
input, and turn on Phantom power for condenser-type microphones. The Channel
1 input signal can be used to trigger or activate a mute command. A VOX Mute
Sensitivity Control, located beside Input 1, can adjust the sensitivity of
the mute circuitry. This can be used to mute background music on another
input channel when a paging announcement is made on Input 1.
- The Channel 2 input can accept more than one type of audio
signal, but only one at a time. The input has a 3-conductor Phoenix connector
for a balanced mic or line source, and a stereo 3.5mm mini-jack. Like Channel 1,
you can select the type of input and turn on Phantom power for condenser mics
through the DIP switches on the rear panel. The stereo 3.5mm input is summed,
and can be used for connecting a CD or DVD player or MP3 player.
- Channels 3 and 4 are stereo RCA summing inputs for
connecting a CD or DVD player.
Speaker Output: The amplifier has a removable Phoenix
connector for the speaker
outputs. There are connections for a 4Ω direct-coupled speaker load, or 25V
and 70V transformer-coupled speaker systems. The Phoenix connector will accept
up to 12-gauge wire.
Zone 2 Output: The AA100PHD features a Zone 2 output that gets
its signal from a selected input for music or messaging on hold applications. The Zone 2
terminal is an unbalanced 600Ω output
with a maximum level of 1.0VRMS. A dedicated Zone 2 volume control is provided
on the rear panel. The removable 2-conductor Phoenix connector accepts up to
18-gauge wire. Four DIP switches are provided for selecting an input for Zone 2.
Pre Out Jacks: The Pre Out (RCA) connector allows
you to feed a signal to another power amplifier or external audio device. An
effects loop can be created by connecting the Pre Out jack to an equalizer or
other device, and then back out to the Amp In connector.
Amp Input: The Amp In connector can be used to
convert the AA100PHD into a slave amp. When a line level signal is connected to
this input, the internal connection between the preamp and internal power amp is
broken. The AA100PHD becomes just a power amplifier, amplifying audio signal
applied to the Amp In (Pwr In) connector.
Front Panel Controls: The front panel includes a master power switch
(push button), a Master Level control, and rotary volume controls
for Inputs 1 through 4. The PHD switch is a flush-mounted button that requires a
small tool with a point to activate the self-diagnostic test (See Push Here
Diagnostic section above). There are status LEDs for Signal, Peak, Limit, and Power.
Bass/Treble Controls: Separate rotary bass and treble
controls are provided on the back panel. Normally set at the 12:00 position, the
bass control lets you adjust bass frequencies from -6 dB to + 6dB at 100 Hz,
while the treble control adjusts treble frequencies from -6 dB to +6 dB at 10
Remote Level Control: The Remote Level Control port lets you
connect an optional Atlas Sound WPD-RISRL or WPD-VC10K level control. You can
control the level of Input 1 or Inputs 2, 3, and 4 together. When a remote level
control is connected, the system's maximum levels should be set using the front
panel level controls, and use the remote potentiometer as an attenuator from the
maximum levels set.
Remote Input Select (RIS): With the optional WPD-RISRL
wall-mounted remote input selector and volume control, you can select inputs 2,
3, or 4, but not input 1, and adjust the volume. This is accomplished without
having to run an audio signal from the amplifier to the selector, which prevents
picking up interference. The WPD-RISRL connects to the amplifier through the RIS
and Remote Level connections on the amp, with a maximum range of 200 feet.
DIP Switches: The versatile AA100PHD has two sets of DIP
switches on the rear panel
that allow the amp to be configured in many ways. One set of DIP switches
selects the input for Zone 2, while the other set allows you to choose which
inputs are muted when a signal is present on Input 1, selects Mic or Line as the
input type for Input 1 and Input 2 independently, turns on Phantom Power for a
Condenser Mics connected to Input 1 or 2, and activates the Remote Input Select
- Frequency Response: 80Hz - 15kHz (+/-3dB; 1% THD)
- Output Power: 100 watts RMS
- Dimensions: Width: 8.25", Height: 3.681", Depth: 10.875"
- Weight: 13 pounds 2 ounces