Features

Overview: The JBL VMA2120 is a cost-effective and flexible commercial mixer/amplifier designed for installed sound applications. Featuring 120 Watts of power per channel, it has 8 input channels and 2 output channels, which can drive either 4 or 8 Ohm speakers or 70V/100V speakers. It also includes VOX ducking during announcements, independent bass and treble controls for each output channel, remote capability with JBL's optional wired volume control, and MP3 file playback from the front panel USB input or a Bluetooth connection.

Inputs: The VMA2120's 8 inputs are as follows:

• Inputs 1 and 4: These are both balanced 1/4" TRS jacks located on the front panel.
• Inputs 2 and 5: These inputs have both balanced 1/4" TRS jacks and balanced 5-pin Euroblock connectors. The Euroblock connectors include priority contacts that will duck other channels during an announcement when the contacts are closed, such as when using a push-to-talk microphone.
• Inputs 3 and 6: Both of these inputs include a 3-pin Euroblock connector and dual unbalanced RCA jacks. Stereo sources are summed into a mono signal.
• Music1 and Music2: These inputs are both dual unbalanced RCA jacks. Signals are summed into mono.
• USB: A front panel USB port is provided for MP3 file playback.
• Remote Inputs: The rear panel includes two RJ-45 style sockets to use with JBL's optional CSR-V remote volume control modules. One for each output channel is provided.

Outputs: The VMA2120 utilizes two Barrier Strips for the output channels. Each strip has set-screw connections that include + and - terminals for a 4Ω or 8Ω connection as well as 70V, 100V, and COM terminals for high impedance speakers. These can accept speaker wire up to 14AWG.

Front Panel: The VMA2120 controls include a main power switch, Bluetooth pairing button, 2 rotary Master output level controls (one per output channel), 8 rotary input level controls (one for each input), Bass and Treble controls for each output channel with +/- 14dB adjustment at 50Hz and 10kHz. The front panel also includes an LCD screen and media playback controls for the USB and Bluetooth sources. Controls include: Play/pause, Stop, Next, Previous, Loop, Record, and media Volume +/-.

DIP Switch Configuration: The VMA2120 has 3 DIP switch panels used to configure the inputs and outputs, giving it a lot of flexibility. By default, Input channels 1-3, Music 1, and Bluetooth/USB are sourced to amplifier 1. Input channels 4-6 and Music 2 are routed to amplifier 2. The user may take any input and have it routed to both outputs by selecting the appropriate switch. Each of the output channels has its own DIP switch configuration. The DIP switch Input/Output sections are as follows:

70V/100V Output Setting: This DIP switch determines whether the amplifier is configured to drive low impedance speakers (4Ω/8Ω) or 70V/100V speakers. When set for high impedance speakers, a 70Hz high-pass filter is automatically applied.

Chime Function: This DIP switch setting enables a chime sound at the onset of an announcement when priority muting is being used.

Line/Mic Switch: This setting will be determined by the strength of the input signal. Switching to Mic activates 48dB of additional gain to the signal.

Phantom Power: The amplifier can apply 27V of phantom power to that input if the microphone requires it.

VOX Function: Voice activated ducking is available for input channels 2 and 5. The audio input level required to activate ducking is set using the two trim pots on the rear panel (one for each input). Turning them counterclockwise will reduce the level while full clockwise will disable the VOX function.

Priority Muting: Input channels 2 and 5 can mute all other channels if pins 4 and 5 are shorted together using a switch such as a push-to-talk microphone. Input 2 can have priority over all inputs going to amp CH1 and Input 5 can have priority over all inputs going to amp CH2. Input 2 will have priority over both amplifier output channels if input DIP switch #2 is set to On.

Media Playback: The JBL VMA2120 allows MP3 file playback from either the front panel USB input or a Bluetooth connected device. A front panel button allows quick and easy pairing of Bluetooth devices.

Remote Volume Control: Each of the 2 output channels has an RJ45 connector on the back panel for using an optional CSR-V wall-mounted, remote, volume control.

Rack Mounting: The VMA2120 includes optional front and rear brackets allowing it to be mounted in a standard 19" rack.

Specifications:

• Maximum Power: 120 Watts into 4Ω or 8Ω
• Number of Input Channels: 8
• Number of Output Channels: 2
• Tone Controls:
  • Bass +/- 14dB @ 50Hz
  • Treble +/- 14dB @ 10kHz
• Input Sensitivity:
  • Mic input: 5.5mV
  • Line input: 1.3V
  • RCA input: 130mV
• Frequency Response:
  • 4/8Ω Output: 20Hz - 20kHz +/- 2dB
  • 70V/100V Output: 80Hz - 15kHz +/- 3dB
• Total Harmonic Distortion (THD): <0.5%, 20Hz - 20kHz
• Signal-to-Noise Ratio: >76dB
• Input Impedance (Nominal):
  • Mic: 400Ω
  • Line: 20kΩ (balanced)
  • RCA: 50kΩ
• Phantom Power: 27 VDC
• Crosstalk: -70dB
• Dimensions:
  • Width = 17.0"
  • Height = 3.875"
  • Depth = 18.0"
• Weight: 29.3 lbs.