Detail 01
Shared cutoff and resonance
One cutoff control and one resonance control address both stereo channels together.
Product detailSKU #1500000474621
Erica SynthsAcidbox III Stereo Polivoks VCF
modernelectronicpop
1/2
Independent shopping perspective
The Korena take
Acidbox III is a tabletop stereo analog filter processor built around a Polivoks lowpass/bandpass VCF and the original-style programmable operational amplifiers named in its design. Shared cutoff and resonance work across both channels, with self-oscillation available at higher resonance settings. An analog overdrive circuit, syncable eight-waveform LFO, and envelope follower give incoming audio several ways to animate the filter. It can run a mono source through both sides because the right input is normalled to the left.
Strong match
Who this is for
- Adding synchronized LFO or envelope-following filter movement to stereo audio sources.
- Using a mono source through the stereo processor via the normalled right input.
- Controlling cutoff, bypass, or tempo from compatible external control hardware.
What matters in use
The specifications, translated
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.
Detail 02
Configurable CTRL IN
It can accept a bypass footswitch, cutoff CV, LFO sync trigger, or an unpowered expression pedal.
Detail 03
Envelope attenuverter
Envelope-following cutoff modulation can be set for normal or inverted response.
Detail 04
Input and modulation level support
Input signals and modulation CV are specified up to 20V peak-to-peak.
Final check
Know before you order
- 01The outputs are balanced left and right connections.
- 02Expression-pedal support is specified for unpowered Roland-compatible and Korg-compatible pedals.
- 03The supplied universal AC/DC adapter supports 110V to 220V.
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01Does Acidbox III accept a mono signal?
Yes. Its right audio input is normalled to the left input for mono sources.
02Which filter modes are available?
It offers stereo lowpass and bandpass Polivoks filtering.
03Can a footswitch control it?
Yes. The configurable control input supports a single or dual footswitch for bypass and tap tempo.
Reference
Full specifications
The complete catalog record, organized around the decisions musicians make when comparing gear.
6 detailsPickups & controls
- Footswitch Support
- Single or dual footswitch for bypass and tap tempo
- Cutoff Control
- Manual cutoff knob and CV control
- Resonance Control
- Shared resonance control for both channels
- Control Input Compatibility
- Unpowered expression pedals, Roland-compatible and Korg-compatible
- Filter Mode Switch
- Lowpass and bandpass selection
- Control Input
- Configurable control input for bypass footswitch, cutoff CV, LFO sync or expression pedal
1 detailsPlayability
- Neck Shape
- U
1 detailsBody & build
- Color
- Black
5 detailsConnections & power
- Input Signal Level
- Up to 20V peak-to-peak
- Audio Inputs
- Left and right audio inputs, right input normalled to left for mono signals
- Audio Outputs
- Balanced left and right audio outputs
- Input Gain
- Adjustable input gain up to +20dB
- Power Supply
- Universal AC/DC adapter 110V to 220V
3 detailsSize & weight
- Envelope Modulation Depth
- Attenuverter with normal and inverted response
- Weight
- 1.54
- Dimensions
- 7.28 inch x 5.51 inch x 2.17 inch
12 detailsOther
- Tap Tempo
- Tap tempo button for LFO synchronization
- Filter Type
- Stereo lowpass and bandpass Polivoks VCF
- Model
- Acidbox III
- Envelope Follower
- Built-in envelope follower with rate control
- Filter Core
- Original Polivoks programmable operational amplifiers
- Resonance
- Self-oscillation capable
- Modulation Cv Level
- Up to 20V peak-to-peak
- Lfo Sync
- External trigger sync 0V to +5V
- Product Type
- Analog filter stereo processor
- Lfo
- Syncable LFO with 8 waveforms
- Master Modulation
- Global modulation level control for LFO and envelope follower
- Overdrive
- Built-in analog audio overdrive circuit
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