The Ladder, a Professional 500 Series Dynamic Ladder Filter based on Bob Moog's original ladder filter design. The Ladder is Moog Music’s first 500 series module for the Pro Audio market and is designed to add depth, flexibility and classic Moog vibe to sound sources.

Extended information

The Ladder packs all the punch, fullness and analog euphoria of the
original Moog Filter, but adds key component and feature upgrades
required for professional studio use. From classic Moog filtering and
vibe to modern sweetening and wild, exciting behavior; The Ladder is a
powerful, articulate sound sculpting tool.

The Ladder features include:
- Low Pass and High Pass: The Ladder has inherited the smoothest all analog filter section possible. Choose between LP and HP at the flick of a switch.
- Cutoff: Simply adjust this knob to determine where The Ladder begins to sculpt the sound.
- Attack and Release: These variable controls allow you to perfectly dial in the timing behavior of The Ladder's envelope section. Use them to open and close the envelope as fast as lightning, or slow as molasses.
- Amount: Use in Positive or Negative mode for mild to extreme sound shaping and manipulation. The amount determines how much signal is sent to the envelope section of The Ladder. From slight timbral excitement and voicing to extreme compression-like behavior and even reversed filtering is achievable.
- Resonance: Controls the amount of harmonic bump at the cutoff frequency. This is the voice of The Ladder. Create sweet, dynamic or extreme speech like behavior and beyond. Accentuate specific frequencies to excite a sound or create completely new and unique ones.
NOTE: The Ladder's Resonance control can push the unit into self-oscillation. This can be used for effect if desired.
- 2Pole/4Pole: Select how aggressive the filter slope is. 2 pole is equal to 12db per octave, which is smooth and sweet, while 4 pole is 24db per octave, which is hard, aggressive and most similar to a Classic Moog filter.
- Bypass: Totally transparent relay bypass for routing and A/B comparison

Technical specifications

Audio I/O: XLR (Via 500 rack) Balanced line level
Level Controls: Input and Output level
Bypass: Hard Bypass
Filter Type: Dynamic Low Pass and High Pass
Envelope Type: Variable Attack/Release
Envelope Control: Positive and Negative Modulation
Input Impedance: 20KΩ, balanced
Output Impedance: less than 50Ω
Max. Output Level: +24dBu, balanced
Drive Gain: -15 to +15 dB
Output Gain: -15 to +15 dB
Noise Level: better than 73dB below +4dBu, 0-30kHz
Power Consumption: max 88 mA