Boss EX-4 Effects Expander was announced on September 24, 2026.
Boss USA
Boss EX-4
Boss EX-4 Press Release
Boss EX-4 Startup Guide
Boss Boss EX-4 Reference Manual
Boss Boss EX-4 Reference Manual Online
Boss Boss EX-4 Parameter Guide
Boss Boss EX-4 Parameter Guide Online
Boss Boss EX-4 Software
Boss Boss EX-4 Support
To register the Boss Ex-4, click here.
2026-09-24
Boss EX-4
Type: Effects Expander
Price: US $300
On sale @ Amazon.
Buy @ Guitar Center.
Shop @ Boss.
Here are select Boss accessories for Boss EX-4.
Boss PCS-20A
Type: Parallel Daisy-Chain Cord
On sale @ Amazon.
Buy @ Guitar Center.
Shop @ Boss.
Boss PSA-120S2
Type: Power Adapter
On sale @ Amazon.
Buy @ Guitar Center.
Shop @ Boss.
Here are select cables for Boss EX-4.
For Boss cables, click here.
For Mogami cables, click here.
For Roland cables, click here.
Where do we go from here?
Back to Boss Effects.
Go to Boss.
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