Radial SW8

8-channel Passive Auto-Switcher


About this item



The Radial SW8 is an 8-channel auto-switcher that allows you to set up a redundant backup system by automatically switching between two multi-channel playback systems.

  • Switch between redundant playback systems
  • Manual or seamless automatic switching
  • Line-level or transformer isolated mic level outputs
  • May be linked for larger playback systems

Under the Hood

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. The SW8 will monitor any continuous audio signal such as SMPTE on the main playback system, and should the signal drop it will automatically switch to the backup. Switching can also be performed manually on the front panel, or by using a footswitch such as the Radial JR2. For larger systems beyond 8 channels, multiple SW8s may be linked together.

The Radial SW8 is an 8-channel auto-switcher designed to switch balanced and unbalance audio sources and deliver them via a straight wire or transformer coupled interface. As solid wire specifications cannot be measured, the graphs below depict the performance of the SW8 using the transformer isolated XLR outputs. it is also important to note that the direct box outputs are designed to reduce a +4dB balanced source to a lower mic level source, thus resulting in a -20dB drop in level. This enables the SW8 to be used in a typical snake system without fear or overload and crosstalk.

Audio circuit type:Passive signal path with active relay switching
Transformer:Eclipse ET-DB2
Number of channels:8
Frequency response:20Hz ~ 20KHz
Dynamic range:>120dB
Total harmonic distortion:0.002%
Intermodulation Distortion:>0.002%
Phase Deviation:-2° @ 20Hz
Input Impedance:140k Ohms, balanced
Output Impedance:150 Ohms, balanced
Common Mode Rejection Ratio:-112dB at 50/60Hz
Equivalent Input Noise:-95dBu
Maximum Input:26dBu
Input pad, Ground lift, Remote Footswitch
Input Connectors:1/4″ TRS, D-sub
Output Connectors:XLR, D-sub
Extras:Contact Alarm Input, JR-2 XLR
Construction:14 gauge steel chassis & outer shell
Size (L x W x D):17.5″ x 6″ x 1.75″ (44.5cm x 15.25cm x 4.5cm)
Weight:9.2 lb (4.2kg)
Shipping size (L x W x D):22″ x 10.375″ x 4.5″ (55.9cm x 26.4cm x 11.4cm)
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
Warranty:Radial 3-year, transferable


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