AtlasIED AA240

Features

Overview: The Atlas Sound AA240 is a six-input, 240-watt mixer-amplifier that is ideal for large 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 an 8Ω speaker load, or 25V, 70V, and 100V commercial speaker systems.

Inputs: The AA240 features five balanced microphone inputs (Inputs 1-5) that can also accept line level or telephone signals. The inputs feature Phoenix (Euro Block) connectors, and offer switchable Phantom Power (24VDC) on all five inputs if you are using condenser mics. Rotary trim controls are provided for each input (when set to "Mic") so you can fine tune the gain of the input signal between 0dB and 20dB. Input 6 consists of an unbalanced, stereo-summing line level input with dual RCA jacks. You can connect a CD player or the audio from a DVD player to this input for background music or music-on-hold. You can also input Telephone Paging signals on this input. The Input 6 sensitivity switch should be set to 100mV for paging systems, and 300mV for CD/DVD player outputs. If desired, you can send the Input 6 signal to the Zone 2 output.

Note: Phoenix connector adapters are available for XLR microphone and RCA audio connections.

Speaker Output: The amplifier has a terminal strip for the speaker outputs. There are connections for an 8Ω direct-coupled speaker load, or 25V, 70V, and 100V transformer-coupled speaker systems.

Zone 2 Output: The AA240 features a Zone 2 output that gets its signal from Input 6 for music or messaging on hold applications. There are two Zone 2 output terminals: a 1 watt @ 8Ω output (to an external speaker), and a transformer-isolated 600Ω output with a maximum level of 1.5VRMS (typically used for "music on hold"). A dedicated Zone 2 volume control is provided on the rear panel.

Pre Out/Line Out Jacks: The Pre Out (RCA) connector allows you to feed a signal to another power amplifier or external audio device. This signal is affected by the bass and treble controls, as well as the 400Hz low-cut filter, when engaged. 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 (Pwr In) connector.

Amp Input (Pwr In): The Amp In connector can be used to convert the AA240 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 AA240 becomes just a power amplifier, amplifying audio signal applied to the Amp In (Pwr In) connector.

Line Outputs: Line Outputs A and B are paralleled mono jacks that can provide an unbalanced, line-level signal to another amplifier or other external device. The line outputs are affected by the tone controls as well as the low-cut filter, when engaged.

Tape Outputs: Tape Outputs A and B are line level mono signals for connecting recording devices. The signal from the tape outputs is not affected by the tone control and low-cut filter.

Bridge In/Out: Some installations require combining one or more mixers together. The mixers may be in different rooms, but have the need to share a page or music throughout the installation. The Bridge In/Out terminals can send and receive balanced line level signals from the internal mix bus of the amplifier. These Phoenix-type inputs feature Bridge In/Out and Bridge Select terminals.

Front Panel Controls: The front panel includes a master power switch (push button), a Master Gain control, and rotary volume controls for Inputs 1 through 6. Rotary bass and treble controls (±10dB at 100Hz and 10kHz) are provided for the main and line outputs. The "zero" position for the tone controls is at the "12:00" position. Tone controls do not affect the Zone 2 outputs. There are LEDs to indicate the status of the System Signal, Peak, and Power.

Low Cut Filter: The AA240 has a switchable, 400Hz low-cut filter with a 6dB per octave slope. When paging horns are connected to the amplifier, it is recommended the low-cut filter be engaged to prevent low bass from entering the speakers. When the low-cut filter is engaged, the front panel bass control is bypassed.

Remote Mute: When the AA240 is used for background music with paging, it is necessary to temporarily mute the music when the paging announcement is made. Dipswitches on the amp can be set to select which inputs receive the mute trigger when a contact closure is present on the remote mute terminals (Phoenix/Euro connector).

VOX Mute: You can also mute Inputs 2-6 when a signal is present on Input 1. The rotary Input 1 Sensitivity control on the rear panel lets you adjust how sensitive the mute send circuitry reacts. When the sensitivity is set to the lowest end of the control (fully counter-clockwise or "zero"), a higher amplitude signal is required on Input 1 to trigger the mute. At the highest end of the control (clockwise or "10"), a lower amplitude signal will trigger the mute.

Optional VCA Control: With the optional AAVC-10K VCA wall-mounted remote volume control, you can control the volume of the entire system (Master), or the volume of the sound source on Input 6 (typically, background music). You can configure the VCA control through the dipswitch panel on the rear panel (Dipswitch B, Position #8).

Unswitched AC Outlet: An unswitched AC outlet is provided on the rear panel to power accessories (such as a rack work light) or other devices. The outlet is live whenever the power cord in plugged into an energized outlet. The maximum power draw of the outlet is 500 watts. The outlet is protected by a 4A circuit breaker.

Dipswitches: The versatile AA240 has two sets of dipswitches on the rear panel that allow the amp to be configured in many ways. The dipswitch functions include:

Dipswitch A

Dipswitch B

Rack Mounting Options: The AA240 can be mounted in a standard equipment rack, using the optional AARM-2RU rack mount kit. The amplifier is 2U in height. If multiple AA240s are being stacked in the rack, you should install 1U vented panels (Atlas Sound SVP19-1-052) between the amps to aid in cooling. The rack kit and vented panels are available directly from the manufacturer.

Specifications:

• Frequency Response: 50Hz - 20kHz (0.5% THD)
• Output Power: 240 watts
• Dimensions: Width: 16.54", Height: 4.219", Depth: 14.06"
• Weight: 27.85 pounds