
Anthony Easton
The Maxon AD-999 is a vintage series analog delay pedal designed to deliver rich, warm, and organic delay tones. It features eight custom Maxon MC4107D Bucket Brigade ICs, providing a delay time of 40 milliseconds to 900 milliseconds. The pedal's delay repeats exhibit a slightly overdriven tonality, adding depth to clean sounds and complementing dirty tones. The AD-999 also features a slight EQ spike at around 1.5 kHz to prevent the repeats from becoming muddy.
Technical Specifications:
- Input Impedance: 500K Ohms
- Output Impedance: 10K Ohms or less
- Residual Noise: -95 dB (input shorted, IHF-A weighted)
- Control: Delay Time, Repeat, Delay Level
- Switch: Normal/Effect (4PDT mechanical true bypass)
- I/O: Input, Output (Mix in mono, Wet only in stereo), Dry Output
- Current Consumption: 46 mA at 9VDC / 48 mA at 10VDC
- Dimensions: 117 (W) x 150 (D) x 60 (H) mm
- Weight: 600 Grams
The AD-999 also features Mechanical True Bypass switching on both outputs via a Fujisoku 4PDT switch, ensuring high-quality signal routing. The pedal's delay tone is described as pure analog heaven, reacting dynamically to the player's performance.
The AD-999's design incorporates a high impedance input buffer, Compander stage, clock drivers, and a mixer/amplifier to blend the clean and delayed signals. The pedal is capable of self-oscillation effects and is equipped with stereo (wet/dry) outputs.
Watch the latest video demos and reviews for the AD-999 from YouTube. Stompbx updates this every six months to reflect the most popular reviewers and guitar pedal demos for each pedal.

Below are live Reverb listings for the Maxon AD-999 from Reverb. Stompbx automatically aggregates current offers to give you a quick look at available models, conditions, and prices. Perfect for comparing options and making an informed purchase.

Very Good
$270.72

Excellent
$397.06

Good
$230

Excellent
$175

Excellent
$480.08

Brand New
$439

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Check out the latest news and articles from around the pedal world.

Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton