Description
The Trap Door Electronics Active Acid is a 4-pole analog low pass filter designed for players who want movement, character, and hands-on control in their signal chain. It's perfect for guitar, bass, or synth setups, and it's especially useful if you're exploring funk-inspired envelope sweeps, ambient textures, or synth-like modulation without diving into digital territory.
It features a classic resonant low pass filter with enough range to push into self-oscillation, so you can get everything from subtle tone sculpting to squelchy synth sounds. An onboard envelope follower tracks your playing dynamics and opens the filter based on your touch, sensitivity and attack controls let you fine-tune the response. You can also sweep the filter manually via an expression pedal for more interactive control. The blend knob mixes your dry and filtered signals, while a volume control keeps your output steady when the resonance gets wild.
Top-mounted jacks and a durable aluminum enclosure keep your board tidy and gig-ready. It runs on standard 9V power and stays true to your signal path when bypassed. If you're into dynamic tone shaping and analog filter sounds, this pedal brings a ton of flexibility and fun in a tight, focused format.
Specifications:
- Type: 4-Pole Analog Low Pass Filter
- Bypass: True Bypass
- Controls: Frequency, Resonance, Blend, Volume, Envelope Sensitivity, Envelope Attack
- Inputs: 1x 1/4" Instrument Input
- Outputs: 1x 1/4" Output, 1x 1/4" Expression Pedal Input
- Power: 9V DC Center Negative (2.1mm), 50mA
- Dimensions: 4.7" x 3.7" x 1.5"
- Enclosure: Aluminum
Sku: TD-AA
