Saturday 28 November 2015

Decibel Eleven Split Personality Amp Switcher AB/Y

I sometimes like to run two amps together, such as my Orange TH30 and Fender Blues Junior. In the past I have used a simple passive AB/Y box. This worked reasonably well, but did create a fairly noticeable mains hum.

After a quick search for a solution, I came across the Decibel Eleven Split personality which seems to have all the things I need:

  • Class-A, all discrete, high impedance buffer - eliminates losses due to splitting and allows driving long cable runs without high frequency loss.
  • Second output is transformer isolated and includes a ground lift switch to eliminate the noise and hum from ground loops
  • High quality transformer - provides extremely flat frequency response even when driving lower impedance line inputs 
  • Second output includes a phase reversal switch - corrects any polarity mismatch between two amplifiers 
  • Increased headroom - allows for hot signals without clipping
  • Optional mute function - for muting both outputs 
  • MIDI Control - allows remote access to 128 custom pre-sets using MIDI program changes and/or direct switch control using MIDI continuous controller messages
The Radial BonesTwin City and Lehle Little Dual are two other options I came across, both of these get good reviews, but they are more expensive and do not have the midi or mute functions. As I am using this to run 2 amps together rather than switching between the two, the 'clicky' switches are not a problem either.

The D11 Split Personality is a very well built unit, heavy and solid. It does not colour your sound in any way, gets rid of the mains hum, has very visible LED's and looks the business too.

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