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Two-Channel Mixer

Part #: TSD-RL21
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MSRP: $284.99
Our Price: $229.99
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Top TSD-RL21 Specifications
  • Description: 2 x 1 Mic/Line Mixer with Remote Level
  • Chassis Color: Black
  • Chassis Material: Aluminum
  • Inputs
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Atlas Sound's TSD-RL21 is a two-channel mixer. This 2x1 mic/line mixer enables paging over intercom capability, which makes it ideal for malls, department stores, hospitals, and other settings that require an intercom system. The TSD-RL21 can be used alongside power amplifiers or remote mixers. It can be paired with a control wall plate (AAVC-10K) for remote control capabilities from the switch rather than the mixer. 

The TSD-RL21 is configurable: Configure channel 1 from the rear panel dip switch to accommodate mic or line level. Channel 2 features a stereo-summing RCA line level input. 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:

  • 1 mic/line input
  • 1 summing RCA line input
  • Remote level control assignable mix bus or input 2 only
  • Balanced mono line out
  • Input and peak signal indicator LED
  • High gain output for driving long balanced lines
  • Removable Phoenix-style I/O connectors
  • Security covers for front panel controls
  • Energy efficient


  • 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 1, Balanced Mic or Line Selectable
  • Connection: Removable 3 Position Captive Screw 3.5mm Spacing
  • Impedance: 1.2K Balanced, 600 Unbalanced
  • Line Input Level: 1V (0dBV) Balanced = 2V (+6dBV) Balanced Output, Maximum Input 6V (15dBV)
  • Mic Input Level: 46dB Gain 10mV (-40dB) 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)
  • 1Controls
  • Input Level Control: Qty 2, Removable Knobs with Security Covers
  • Remote Level: Control Port 10K External Pot, Removable 2 Position Captive Screw 3.5mm Spacing
  • Dip Switch Function: Input 1, Mic/Line Select / Remote Level Assign, Mix or Input 2 / Indicators
  • Input Signal: Green, 25mV On Threshold
  • Input Peak: Red, -3dB Before Clip
  • Power: Blue
  • Electrical
  • Frequency Response: 20Hz - 20kHz ( 1dB)
  • THD: .06% & 1kHz
  • Signal to Noise: Line to Line: 85dBV / Mic to Line: 70dBV
  • 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
  • Power Requirements
  • Voltage: 24VDC
  • Power Consumption: 60mA
  • Power Consumption: 1.4W
  • Dimensions: 1.5" (39mm) x 4" (101mm) x 2.75" (70mm)
  • Weight: 6oz, .165kg
  • Accessories
  • TSD 24VDC: Power Supplies
  • TSD-RMK: 1 RU Rack Panel
  • Safety and Certifications
  • External Power SupplyL: cUL, CE, RoHS, TUV
  • Warranty: 3 years

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