SoloDallas Introduces the New EX Tower

A 1:1 replica of the original Schaffer-Vega Diversity System.

San Diego, CA (September 12, 2016) -- The SoloDallas EX Tower is the latest evolution in a four decade quest for tone & signal enhancement. The EX Tower is designed for professional & boutique musicians, producers, and engineers seeking to take their mixes and tracks to the next level.

Created as a 1:1 replica of the original Schaffer-Vega Diversity System audio circuitry, The EX Tower has a very unique sound signature. This device brings back that elusive sound heard on albums such as Back in Black and Highway to Hell, and was used extensively by Aerosmith, Grateful Dead, Nile Rodgers & Chic, and hundreds of others, including AC/DC.

Just as he did on Powerage and Back in Black, Angus Young used the newest SD Tower on all of the Rock or Bust tracks, as well as the entirety of every live AC/DC show in 2015 & 2016. The Tower is also presently used by Sting, Joe Bonamassa, Keith Urban, and Airbourne, among others.

The EX Tower version is built with through-hole components and housed in an enclosure identical to the original ’63EX’ receiver, which was 3D scanned and faithfully recreated. The EX Tower circuit is 100% analog and features an analog limiter derived from a previously unseen and very musical Opto-Isolator (a vintage optical limiter) recently discovered in our latest reverse-engineering of the original Schaffer-Vega Diversity System TX10 Transmitter, as well as a compander (compressor-expander), giving your tone extra sustain, fatness and a rich harmonic content.

The new EX Tower debuts a balanced XLR output & two switches on the back panel. The first switch enables the opto-isolator for even more tonal flexibility. The second switch is an extra normal/boost mode which allows for either a smoother, quieter operation, or full-out 30db of clean boost to “give a guitar hell” (in Angus Young’s own words).

This device reproduces not only the sound, but the complete experience of operating a long-lost vintage piece of audio equipment, with the stability of 2016 technology and manufacturing.

For more information:

There’s way more than blues-rock fodder buried in the crevices of the most overused scale in music.



  • Explain how chords are generated from scales.
  • Create unusual harmonies, chord progressions, bass lines, and melodies using the blues scale.
  • Demonstrate how music theory and musical intuition can coalesce to create unique sounds from traditional materials.
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