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Radial Engineering SW8

The Radial SW8 is a backing track switcher that automatically switches between two playback systems to prevent disaster during a live performance.

The Radial SW8 is an 8 channel auto-switcher that allows you to set up a redundant backup system by automatically switching between two sources such as a pair of digital recorders, computers or network systems.

Designed primarily for live concerts and stage shows where backing tracks are used for orchestration, vocals and sound effects, SW8 employs an adjustable gate to detect a machine malfunction and automatically switch to a second 'backup' machine to deliver a seamless performance. One merely records a steady state signal on a track and feeds it to the SW8. Should the signal drop, the SW8 will automatically switch to the B system and 'sound' an alarm. Switching can also be performed manually via the front panel A~B switch, a rear access latching switch or by using the optional Radial JR2 footswitch. For larger systems, multiple SW8s may be linked together to create 16, 24 or 32 track systems.

Housed in a heavy duty 14-gauge steel 19" enclosure, the Radial SW8 is equipped with choice of 25-pin D-sub or ¼" TRS connector inputs with both XLR and D-Sub outputs. The front panel XLRs produce a balanced DI mic level to feed a snake system and are transformer isolated to eliminate hum and buzz caused by ground loops. The rear panel D-Sub provides direct balanced line level connectivity and the transformer isolated outputs may be internally re-patched to send the mic level signal to the 25 pin D-sub output if needed. To further suppress switching noise, a series of internal filters help eliminate DC offset from offending source devices. A global mute switch may be engaged that turns off the XLR outs, enabling you to audition and cue tracks on the fly. This is augmented by a standby switch that holds the SW8 on the source-A inputs in between songs.

The Radial SW8 eliminates embarrassing system malfunctions by providing an easy to implement system that will ensure your show will go on!
  • Switch between two playback systems automatically
  • Expandable 'link' with remote control contact closure
  • Balanced or unbalanced mic and line level operation
  • Transformer isolated DI output on each channel
  • Specifications
  • Audio circuit type : Passive signal path with active relay switching
  • Input impedance : 140k Ohms, balanced
  • Output impedance : 150 Ohms, balanced
  • Frequency response : 20Hz ~ 20KHz
  • Gain : -20dB
  • Dynamic range : >120dB
  • Total harmonic distortion : 0.002%
  • Noise floor : -115dBu
  • Signal to noise ratio : >94dB
  • Equivalent input noise : -95dBu
  • Maximum input : 26dBu
  • Phase deviation : -2° @ 20Hz
  • Intermodulation distortion : >0.002%
  • Common mode rejection ratio : -112dB at 50/60Hz

  • Features
  • Number of channels : Eight channels
  • Switching : Local, remote, and auto-switching with gate
  • Transformer : Eclipse ET-DB2
  • Pad : -30dB
  • Ground lift : Disconnects XLR pin-1 at isolated output
  • XLR configuration : AES standard Pin-1 ground, Pin-2(+), Pin-3(-)
  • Connectors : ¼" TRS, DB-25 inputs; XLR-F, DB-25 outputs

  • General
  • Construction : 14 gauge steel chassis & outer shell
  • Finish : Durable powder coat
  • Size : (W x H x D) 17.5" x 6" x 1.75" (44.5 x15.25 x 1.75cm)
  • Weight : 9.2 lb (4.2kg)
  • Shipping size : W x H x D : 10.25" x 4.5" x 22.5" (260 x 114 x 572mm)
  • Shipping weight : 9.7 lb (4.4 kg)
  • Power : Two +15VDC/400mA power supplies included
  • Conditions : For use in dry locations only between 5°C and 40°C
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    Additional information
    For more information about the SW8, please visit the website of Radial Engineering
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