The Monoprice Indio AD-4 Vintage Analog Delay is a compact guitar effect pedal in the delay family. It is an analog circuit with true bypass switching, and RockBoard's PedalPedia describes it as combining "the original warmer tone of those 70s and 80s stompboxes, with modern, high-end features" such as 350ms delay times and a true bypass design1.
What it does
As an analog delay, the AD-4 repeats your signal in the warmer, darkening style associated with older analog stompboxes rather than the cleaner repeats of a digital delay. Monoprice positions it as a vintage-flavored delay with modern conveniences: the 350ms maximum delay time covers the short slapback to medium-length echo range most players use, and true bypass means the pedal's circuit is removed from your signal chain when it is switched off1.
Power
The AD-4 runs on a 9V DC supply with a center negative plug, drawing 18mA. That current draw is low enough for most standard pedalboard power supplies1.
The pedal's specifications list 9V DC, center negative power at 18mA, so plan a dedicated supply output or a daisy chain with enough headroom as you would for any pedal on your board1.
Demo
RockBoard's PedalPedia entry for the AD-4 links to a demo video by Steve Sterlacci, in English, showing the pedal in use1.
Videos
MusicGearMondays
Don Honaker
AndyGinterBlues
Sources (1)
- Indio AD-4 Vintage Analog Delay by Monoprice, RockBoard PedalPedia, 2026