Boss EX-4 Effects Expander

The EX-4 is a premium BOSS effects unit that instantly expands the sonic capabilities of any pedalboard setup.

This compact powerhouse delivers up to four simultaneous effects from a vast onboard library, accessed with an intuitive user interface, flexible footswitches, and a versatile range of connectivity options.

The EX-4 is ideal for guitarists, bassists, and other musicians who carefully curate effect choices to maximize creative and tonal options in their pedalboard builds.

Offering a large selection of classic BOSS effects in a space-saving package, this is the ultimate utility pedal for players needing to cover many songs/styles or craft professional sounds on the fly.

VIVID COLOR DISPLAY
Full color 2.4-inch screen for clear viewing of the full effect signal chain, individual effect blocks, editing options, menus, and more.

DEDICATED FX BUTTONS
Quickly turn effect blocks on/off with a single press and access editing parameters with a long press. FX button colors match each effect’s display colors for fast identification.

DUAL FOOTSWITCHES WITH SPLIT LEDS
Rugged dual-function footswitches can be custom-configured system-wide or per memory, with assignments that include effect block on/off, memory up/down, master bypass, tap tempo, and more. A newly designed color LED system surrounds the footswitches, allowing players to clearly identify current footswitch functions while performing.

COMPREHENSIVE I/O
Four audio jacks provide mono or stereo connectivity, with the option to use two jacks as an effect loop for placing one or more external pedals anywhere within the EX-4’s effect chain. Two footswitches or an expression pedal can be connected for more real-time control, while MIDI I/O unlocks deep integration with other MIDI pedals, switching systems, and external clocking devices.

Specifications

• Sampling Frequency: 48 kHz
• AD Conversion: 24 bits + AF method *AF method (Adaptive Focus method) This is a proprietary method from Roland & BOSS that vastly improves the signal-to-noise (SN) ratio of the AD and DA converters.
• DA Conversion: 32 bits
• Processing: 32-bit floating point
• Effects: 120 types
• Maximum Number of Effects: 4(FX1-4) + 6(DIVIDER+MIXER, SEND RETURN, FOOT VOLUME, NOISE SUPPRESSOR1, NOISE SUPPRESSOR2, GLOBAL EQ)
• Memories: 128 (User) + 128 (Preset)
• Nominal Input Level: INPUT L/MONO jack, INPUT R(RETURN) jack: -10 dBu
• Maximum Input Level: INPUT L/MONO jack, INPUT R(RETURN) jack: +7 dBu
• Input Impedance: INPUT L/MONO jack, INPUT R(RETURN) jack: 1 M ohm
• Nominal Output Level: OUTPUT L/MONO jack, OUTPUT R(SEND) jack: -10 dBu
• Output Impedance: OUTPUT L/MONO jack, OUTPUT R(SEND) jack: 1 k ohm
• Recommended Load Impedance: OUTPUT L/MONO jack, OUTPUT R(SEND) jack: 10 k ohms or greater
• Controls
  • DOWN/1 switch, UP/2 switch, 
    • MENU/EXIT button, GEAR SUITE button, FX1 button, FX2 button, FX3 button, FX4 button,
  • SELECT knob, TYPE/VALUE knob, 1-3 knobs
• Display: Color Graphic LCD (320 x 240 dots)
• Connectors
  • INPUT L/MONO jack, INPUT R(RETURN) jack, OUTPUT L/MONO jack, OUTPUT R(SEND) jack, 1/4-inch phone type
  • MIDI IN jack, MIDI OUT jack : Miniature phone type
  • CTL1([3]),2([4])/EXP jack: 1/4-inch TRS phone type
• USB port: USB Type-C(R)
• DC IN jack
• Power Supply: AC adaptor (PSA-S series)
• Current Draw: 300 mA
• Dimensions
  • (without rubber feet) 117 (W) x 138 (D) x 63 (H) mm (4-5/8 (W) x 5-7/16 (D) x 2-1/2 (H) inches)
  • (including rubber feet) 117 (W) x 138 (D) x 65 (H) mm (4-5/8 (W) x 5-7/16 (D) x 2-9/16 (H) inches)
• Weight: 800g (1 lb 13 oz)

Accessories

• STARTUP GUIDE
• Leaflet « Read Me First »
• AC adaptor: PSA-S series
• Rubber foot x 4

Options (sold separately)

• Footswitch: FS-5U, FS-5L, FS-6, FS-7
• Expression Pedal: FV-500L, FV-500H, EV-30, Roland EV-5
• TRS/MIDI connecting cable: BMIDI-5-35, BMIDI-1-35, BMIDI-2-35, BCC-1-3535, BCC-2-3535

*0 dBu = 0.775 Vrms