The Source Audio Soundblox Pro Bass Envelope Filter is an upgraded, pro-series evolution of the standard Soundblox BEF. It offers 22 filter types (including 2-pole and 4-pole low-pass, single/triple peak, peak/notch, and phaser settings) alongside four modulation sources: standard envelope, LFO, passive expression pedal, and Hot Hand motion control. [1, 2, 3, 4, 5]Key Manufacturer Specifications

• Modulation Sources: Standard envelope sweeps, selectable LFO waveforms, Hot Hand motion sensors, and expression pedal control.
• Filter Sounds: 22 total options (2 & 4-pole Low Pass, Single/Triple Peak, Peak/Notch, and Phasers).
• Presets & EQ: 6 savable user presets across two banks, utilizing a built-in, ultra-precise 7-band graphic equalizer.
• Lo-Retain Algorithm: Features a wet/dry mix knob powered by a signature algorithm designed specifically to preserve your low-end bass frequencies.
• DSP & Converters: Powered by the proprietary 56-bit SA601 DSP chip and 24-bit converters.
• Bypass: Active Analog Bypass is fully routed around the DSP with active inputs to ensure zero signal degradation. [1, 2]

Control Parameters

• Sweep & Speed: Offers positive and negative filter sweeps, as well as adjustable attack and decay speeds.
• Tap Tempo: The LFO speed can be controlled and modified directly via an assignable tap-tempo footswitch.
• MIDI & Expression: Features an expression input for multi-parameter control (resembling a wah pedal) and MIDI access for recalling presets and parameters. [1, 2]

Physical Specs

• Dimensions: 7 in. (L) × 6 in. (W) × 2 in. (H).
• Power: Runs on 9V DC power supply (typically included with the unit). [1]

Gently Used in a Rackmont Installation. Does not include power supply.