The DOD Envelope Filter 440 revives one of the funkiest and most expressive envelope filters ever made. First introduced in the 1970s, this reissue delivers the same dynamic, quacky auto-wah sweeps that react to your pick attack—perfect for classic funk grooves, vocal-like phrasing, and dynamically shifting textures.

Now enhanced with modern improvements including true bypass, updated electronics, and a lightweight aluminum enclosure, the 440 is equally ready for guitar, bass, synth, or studio use. Whether you’re after vintage Jerry Garcia-style tones or Flea-inspired bass sweeps, the 440 brings iconic character and responsive filtering to any rig.

• Authentic reissue of the original 1970s Envelope Filter 440
• Touch-sensitive, pick-triggered filter sweeps
• Range control for precise sweep shaping
• Voice switch (Up/Down) for different sweep directions
• Up mode: classic quacky auto-wah tones
• Down mode: deep, throaty bass-friendly sweeps
• Level (Sensitivity) control optimizes envelope triggering
• True bypass switching preserves tone
• Modern updates: blue LED, upgraded components
• Lightweight aluminum chassis
• Works with guitar, bass, keys, synths, and more

• Controls: Level, Range, Voice Switch (Up/Down)
• Bypass: True Bypass
• Power: 9V DC (center-negative) or 9V battery
• Current Draw: Approx. 6 mA
• Input: ¼" Instrument Input (Mono)
• Output: ¼" Instrument Output (Mono)
• Chassis: Lightweight Aluminum
• Dimensions: 4.68" (L) × 2.63" (W) × 2.25" (H)
• Weight: 0.62 lbs (0.28 kg)
  
• Manual: Click here.
  

The Envelope Filter 440 is a touch-sensitive funk machine that rewards expressive players. From bubbly 1970s funk to modern motion-filled textures, its reactive filtering and dual Voice modes make it versatile, musical, and inspiring for guitarists and bassists alike.