DigiTech GSP1101 Preamp/Effects Processor Review

DigiTech GSP1101

Quick Summary

The DigiTech GSP1101 has been around for quite some time now, but remains a popular choice for budget-conscious guitarists who want a flexible rack processor capable of providing high quality effects and a versatile assortment of guitar amp and cabinet models. With a substantially lower price than newer units that offer similar features (like the Fractal AxeFX II and Line 6 Helix), that GSP1101 packs a tremendous bang for the buck. Any semblance of outdated modeling technology with this unit totally vanishes with the use of third-party speaker cabinet impulse responses, which can be loaded into the unit by updating to the beta C63 firmware version. With a selection of great impulse responses loaded, it is clear that the GSP1101’s amps and effects modeling is top notch despite the sometimes lackluster stock cabinet models. The unit also provides tremendous versatility for any situation with its flexible input/output routing options and comprehensive MIDI functionality. With all the features and great tone it packs, it’s no surprise that it’s been a favorite of artists such as Dave Mustaine and Dweezil Zappa.


  • Huge number of amp, effects, and cabinet models
  • Very flexible routing options for functioning in many different rig setups
  • Built-in FX loop allows the ability to use an external preamp with GSP1101 effects
  • User friendly preset editing interface and great software for editing presets via computer
  • Functions as a 2-input/2-output audio interface, negating the need for additional recording equipment
  • Extremely comprehensive MIDI functionality
  • Unofficial beta C63 firmware update adds many great features, such as third-party IR support


  • Cabinet simulations are lackluster
  • Limited ability to change signal chain placement of effects units
  • Maximum of 6 effects blocks may be used simultaneously (and pitch shifting and modulation occupy the same block)
  • Model is no longer officially supported/updated by DigiTech (all firmware updates are considered beta and unofficial)
  • X-Edit software update for beta C63 firmware supports Windows only

Overall Rating: 4.5 stars


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