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3x1 Mic/Line Mixer

Part #: TSD-MIX31RL
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MSRP: $312.99
Our Price: $252.99
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Top TSD-MIX31RL Specifications
  • Description: 3 x 1 Mic/Line Mixer
  • Chassis Color: Black
  • Chassis Material: Aluminum
  • Inputs
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Atlas Sound's TSD-MIX31RL is a 3x1 mic/line mixer featuring a stereo-summing dual-RCA input and 2 mic/balanced inputs that have removable Phoenix-style connectors. This mixer is equipped with switchable phantom power for both mic inputs. This mixer is fitted with an internal mic preamp, which ensures quiet operation and clarity of signal. 

This mixer is a great fit in applications in which intercom paging systems interrupt ambient music to page an employee. Users can set the paging priority via contact closure or VOX trigger on Input 1 (mutes input 3 only). The TSD-MIX31RL features remote control feature that enables users to us an AAVC-10K wall plate for remote control capabilities. The mixer also protects its system by reducing clipping and distortion. 

The TSD-MIX31RL 3x1 mic/line mixer includes two mic/balanced line inputs via removable Phoenix style connectors and a stereo summing dual RCA input. Switchable phantom power is provided for both mic inputs to facilitate condenser microphones. The high quality, low noise internal mic preamps ensure clarity and quiet operation without unwanted coloration. A 12dB / octave high pass filter @ 125Hz also is available on each input to minimize bass rumble and low frequency feedback.

This mixer requires a separately purchased power supply, however, multiple TSD units can be powered via a single power supply and requires 60mA of power. Other key features of the TSD-MIX42RT include the following:

  • 2 balanced mic/line inputs
  • High gain (50dB) microphone preamps
  • Switchable 24V phantom power
  • 1 unbalanced summing dual RCA line input
  • Vox sense and contact closure priority mute of Ch3
  • Variable output limiter
  • Remote level control
  • 12dB/octave low cut filter @ 125Hz
  • Input signal and peak indicator LEDs
  • High gain output for driving long balanced lines
  • Separate ground connections


  • Type: Qty 1, Unbalanced
  • Connection: RCA Left and Right Actively Summed
  • Impedance: 10K
  • Input Level: 316mV (-10dBV) = 2V (+6dBV) Balanced Output, Maximum Input 1.6V (4.1dBV)
  • Type: Qty 2, Balanced Mic or Line Selectable
  • Connection: Removable 3 Position Captive Screw 3.5mm Spacing
  • Impedance: 1.2K Balanced, 600 Unbalanced
  • Phantom: 24VDC Defeatable
  • Low Cut Filter: 125Hz/12dB Defeatable
  • Line Input Level: 1V (0dBV) Balanced 2V (+6dBV) Balanced Output, Maximum Input 6V (6dBV)
  • Mic Input Level: 46dB Gain 10mV (-40dBV) Balanced = 2V (+6dBV) Balanced Output, Maximum Input 40mV (-27dBV)
  • Outputs
  • Type: Qty 1, Balanced Line
  • Connection: Removable 3 Position Captive Screw 3.5mm Spacing
  • Impedance: 300 Balanced, 150 Unbalanced
  • Line Output Level: 1V (0dBV) In = 2V (+6dBV), Maximum Output 6V (15dBV)
  • Controls
  • Input Level Control: Qty 3, Removable Knobs with Security Covers
  • Mute Input 3: Contact Closure, Removable 2 Position Captive Screw 3.5mm Spacing
  • VOX Mute Sens: Trim Adjust for Mic Sensitivity
  • Output Limiter: Threshold Adjust
  • Remote Level: Control Port 10K External Pot, Removable 2 Position Captive Screw 3.5mm Spacing
  • Dip Switch Function: Phantom Power 24VDC, Input 1 & 2 / Input 1 & 2 Mic/Line Select / Input 1 & 2 125Hz/12dB High Pass Filter / Input 3, Mute Receive / Remote Level Assign, Mix or Input 3
  • Indicators
  • Input Signal: Green, 25mV On Threshold
  • Input Peak: Red, -3dB Before Clip
  • Limiter: Red, Limiter Activation
  • Power: Blue
  • Electrical: Frequency Response: 20Hz - 20kHz ( 1dB)
  • THD: .06% & 1kHz
  • Signal to Noise: Line to Line: 85dBV / Mic to Line: 78dBV
  • Output Limiter: Threshold Adjust 50mV Mimimum Output to No Limit
  • Mounting
  • Velcro: Industrial-Grade, Included
  • Brackets: Qty 2, Included
  • TSD-RMK: Optional 1 RU Rack Mount Panel (Supports 4 TSD Units)
  • Cable Retainer: Qty 2, Included
  • Warranty: 3 years

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