Radial Engineering Backtrack Stereo Backing Track Switcher with 1/8" and 1/4" Inputs, Isolated DI Outs

The Radial Engineering Backtrack™ is a compact stereo audio switcher, ideal for live performers running redundant backing tracks on stage or for switching between any two stereo audio sources.

Connecting your playback devices to the Backtrack is easy, with 1/4" TRS connections provided for the outputs of a recording interface and 3.5mm stereo inputs for integration with a smartphone, tablet or laptop. 1/4" TRS outputs can feed powered speakers for monitoring on stage and balanced XLR outputs will drive signals up to 100m (300ft) to connect to the PA system. The XLR outputs are transformer isolated to eliminate buzz and hum from ground loops and feature a ground lift switch to further reduce noise.

Once connected, an A/B switch determines which stereo input to use, so the backup source can be quickly activated should the primary playback system fail. A JR-2 remote can also be connected to the Backtrack to change the inputs remotely. When cueing up tracks for playback, a mute switch cuts the feed to the main and monitor outputs, allowing tracks to be silently monitored using a dedicated headphone output. This output features its own level control and input selector switch, so even during a live performance, both sources can be checked without disturbing the outputs on stage.

The Backtrack is an ideal switching system for redundant playback devices where reliability and portability is crucial.

Features

• Switch between two stereo backing track sources onstage
• Easily connect playback devices with 1/4" and 1/8" TRS jacks
• Headphone output for silently cueing up tracks
• Transformer isolated main outputs eliminate buzz and hum
• Switch inputs remotely with optional JR-2™ remote
• Ground lift on XLR outputs

Specifications

• Audio Circuit Type: Passive Audio Circuit with Active Headphone Amplifier
• # of Channels: 2
• Frequency Response: 20 Hz to 20 kHz (-0.5/+0.5 dB)
• Noise Floor: -105 dBu
• Dynamic Range: > +130 dBu
• Intermodulation Distortion: 0.02% @ 0 dBu, 1 kHz
• Total Harmonic Distortion: 0.007% @ 0 dBu, 1 kHz
• Common-Mode Rejection Ratio: 34 dBu @ 60 Hz, 42 dBu @ 3 kHz
• Input Connectors: 1/4" TRS, 3.5mm TRS, RCA
  • Maximum Input: > +25 dBu
• Output Connectors: XLR, 1/4" TRS, 3.5mm headphone
• Features: Ground lift, headphone monitoring
• General
  • Power: 15VDC 100mA
  • Construction: 14-gauge steel chassis
  • Dimensions (H x W x D): 1.9" x 4.6" x 5.9" (4.8 x 11.7 x 15 cm)
  • Weight: 2.2 lb (1 kg)
  • Conditions: For use in dry locations only between +5°C and +40°C