When Panasonic closed down their BBD production line in the mid 2000’s, Maxon had a tall task ahead of them to redesign their legendary AD-9 Analog Delay around a different IC chip. The resultant Maxon AD-9 Analog Delay Pro Pedal trumps the original version, offering several new features and a decidedly superior tone.

The AD-9 Pro provides 450 milliseconds of fat, warm analog delay tone thanks to 4 x custom-made Maxon MC4107D Bucket Brigade IC’s. The delay repeats of the AD-9 Pro are filtered using Maxon’s proprietary noise reduction circuitry which reduces the aliasing, clock noise and distortion common to analogs. The result is a rounder, smoother delay repeat that doesn’t overpower the original note.

With a wider dynamic range and max input level of +12 dB, the AD-9 Pro can accept signal from any source. This improved response offers a better balance between low and high frequency ranges, creating a delay tone that is clear and firm while still retaining that characteristic analog warmth. It also allows the Pro to be used in line level effects loops on amplifiers.

The AD-9 Pro features a Multi-Head mode controlled by a top-mounted mini switch. This switch activates a midstream delay feedback loop, creating polyrhythmic repeats against the main delay repeat. The Multi-Head mode can create a striking Tape Echo simulation, or it can be used to create ambient reverb effects at shorter delay time settings.

Topping off the AD-9 Pro are dual outputs that allow routing of the dry and delayed signals to two separate amps or mixer channels. Both outputs feature Mechanical True Bypass via a 4PDT switch.

Input Impedance: 500K Ohms
Output Impedance: 10K Ohms
Residual Noise: -100 dB or less (IHF-A)
Delay Time: 20 mSec to 450 mSec
Equivalent Input Noise: 116 dB or less (IHF-A)
Controls: Delay Time, Feedback, Delay Level
Switch: Single/Dual Mode, Effect
Operating Voltage: 9V
Power Consumption: DELAY TIME MIN 39mA/DC.9V 38mA/DC.10V
Dimensions: 74 mm (W) x 124 mm (D) x 54 mm (H)
Weight: 80 grams (including battery)
Battery: 9V battery (6LR61 or 6F22) x 1 or Maxon AC adaptor
Battery Life: Manganese dry battery more than 2 hours 25deg C / 77deg F (Panasonic 6F22NB) Alkaline dry battery more than 8 hours 25deg C / 77deg F (Panasonic 6LR61G)
Option: Maxon AC adaptor