MikesGig features affiliate links to help support our content. At no cost to you, we may earn a commission on affiliate purchases.
BOSS has officially announced the EX-4 Effects Expander, a compact multi-effects processor designed to give guitarists and electronic musicians a high-density utility boost on crowded pedalboards.
Offering up to four simultaneous effect blocks from an onboard library of 120 algorithms, the EX-4 covers everything from classic BOSS drive, modulation, delay, and reverb models to specialized utility functions—including dedicated noise suppressors, global EQ, send/return loops, and signal dividers.
Key Features & Control Architecture
- 120 Onboard Effects: Includes classic drive/distortion, modulation, delay, and reverb, alongside bass-tuned presets and iconic BOSS effects like Slow Gear and Slicer.
- Four Simultaneous Blocks: Run up to four independent effect blocks at once with flexible signal path placement.
- Gear Suite Functionality: Instant recall system allowing users to store and organize custom pedalboard setups and global utility routings.
- Color LED Hardware: Color-coded FX buttons match screen graphics and surround the dual-function footswitches for clear stage identification.
- Stereo & MIDI I/O: Features four audio jacks for mono/stereo routing or FX loop insertion, external expression pedal support, and low-profile TRS MIDI I/O.
BOSS EX-4 Specifications
| Specification | BOSS EX-4 Effects Expander |
| Effect Engines | 120 Built-In Algorithms (Up to 4 Simultaneous) |
| Utility Routings | Global EQ, Send/Return Loop, Divider/Mixer, 2 Noise Suppressors |
| Footswitches | 2 Multi-Function Switches w/ Color LED Halo Rings |
| Audio I/O | 4 x 1/4″ Jacks (Mono/Stereo In/Out or Internal FX Loop) |
| Control & MIDI | 1/4″ Expression/CTL In, 3.5mm TRS MIDI In/Out |
| Street Price | $199.99 USD (Estimated) |
“Modern players carefully curate their pedalboard builds, and every slot must earn its place. Offering a large selection of classic BOSS effects in a space-saving design, there’s no better utility pedal than the EX-4.”
Availability
Check Price on Amazon
The BOSS EX-4 Effects Expander is shipping to authorized BOSS dealers worldwide starting late September 2026.
Where to buy:
MikesGig — Gear Moves Music. Music Moves People.
/ama
About The Author
