Maxon AD-9 Analog Delay


  • Delay Time
    controls the delay time
  • Repeat
    controls the number of repeats (feedback)
  • Delay Level
    controls the volume of the delayed signal


  • Input
    audio input
  • Dry Output
    direct output of the clean input signal
  • Delay Output
    output for the delayed signal



The revised AD-9 improves on one of Maxon's most coveted models in order to create the best sounding, most reliable analog delay ever. Improved construction including through-hole, glass reinforced epoxy PCB's, snap-in PCB connectors, and true bypass switching guarantee trouble free performance. The combination of one Panasonic MN3205 BBD IC and one Signetics NE570 compander provides warm yet crystal-clear delay time with adjustable repeats and zero clock noise.

The AD-9 captures all the classic sounds of the most sought-after vintage analog delay units. With 10-300 milliseconds of variable Delay Time provided by a Panasonic MN3205 (low voltage BBD IC, now out of production), the AD-9 can produce a wide variety of time-delay effects, from Rock-A-Billy slapback echo to erratic, runaway delays. The unit's Repeat control provides additional spatial effects by adjusting the repeats from one to infinity to emulate various room sizes. Calibrated for self-oscillation, the AD-9 is capable of "UFO landing" effects as well as many other bizarre sounds limited only by the user's imagination.

The AD-9's Delay Level control adjusts the mix between dry and effected signals, allowing the delayed signal to sit back behind the input signal to add subtle ambience or right up in front for greater impact. Stereo outputs provide a variety of signal routing options for use with multiple amplifier setups or mixer channels. All sounds are provided with zero clock noise thanks to one Signetics NE570 compander and true bypass switching using a 4PDT mechanical switch.


myFXDB user reviews

1 review, average score of 10 / 10

2017-03-1610/10  Best delay sound I've ever heard...

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  • Input Impedance
    100K Ohms
  • Output Impedance
    10K Ohms
  • Residual Noise
    -100 dB or less (input shorted IHF-A weighted)
  • Delay Time
    16 mSec to 300 mSec
  • Controls
    Delay Time, Delay Level, Repeats
  • Switch
    Normal/Effect (true bypass configuration w/4PDT switch)
  • Power Consumption
    19 mA (9 V battery) or 20 mA (10 V adaptor)
  • Dimensions
    74 mm (W) x 124 mm (D) x 54 mm (H)
  • Weight
    580 grams (including battery)

Where to find one?

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fx pedal stompbox stomp box guitar effects pedal analog delay analogue delay echo repeat delay/reverb
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