Hz Box
Key Features
- Algorithmic soundbox emulation that models instrument bodies, guitar cabinets, and resonance chambers for unique timbral shaping
- Four parallel bandpass filters with individual volume, pan, and phase inversion controls for sculpting custom tonal profiles
- Short-delay resonator with feedback that emulates sound bouncing inside an enclosed acoustic space
- Stereo LFO modulation applied to tone sweep and resonator time for chorus, phaser, and early-reflection reverb effects
- Four-channel mixer blending clean, driven, filtered, and resonated signals with independent level controls
- Adjustable oversampling from off to 16x for balancing CPU load and audio quality
- Seven factory presets covering soundbox, chorus, reverb, and experimental textures
Description
Hz Box by Higher Hz is an algorithmic soundbox emulator that reshapes the timbral character of any audio signal. Rather than applying a single effect, it models the way acoustic instrument bodies, guitar cabinets, and resonance chambers color sound, giving tracks a sense of physical depth and dimension.
The plugin's signal chain routes audio through a soft drive stage, a four-band parallel bandpass filter section with independent pan and phase inversion per band, and a short-delay resonator that mimics sound bouncing inside an enclosed space. A dedicated modulation section with stereo LFO adds movement to both the tone filters and the resonator delay time, unlocking chorus, phaser, and early-reflection reverb textures.
Bedroom Producers Blog described Hz Box as having "a decidedly strange flair," comparing it to PSP's PianoVerb for its ability to produce unusual, resonant timbres. The plugin is particularly effective on synthesizers and electronic sources, where the bandpass tone shaping and resonator feedback create unpredictable, evolving textures that standard chorus or reverb plugins cannot replicate.
Each section feeds into a four-channel mixer with separate Clean, Drive, Tone, and Reson level controls plus a master output. Oversampling scales from off to 16x, and the developer recommends placing a limiter after Hz Box since the resonance feedback can produce loud transient peaks.
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Frequently Asked Questions
What types of effects can Hz Box produce?
Hz Box can create five distinct types of effects: instrument body resonance chamber simulation, combo speaker/cabinet emulation, chorus, phaser, and early-reflection reverb. The results depend on how you balance the four-channel mixer and modulation settings, so each sound source responds differently.
Does Hz Box work as a traditional chorus plugin?
Hz Box is categorized as a chorus plugin but it goes well beyond traditional chorusing. The modulation section can produce chorus-like effects when applied to the resonator delay time, but the plugin's core design is a soundbox emulator that combines bandpass filtering with short-delay resonance. Standard chorus effects are just one of several textures it can generate.
Why does Higher Hz recommend using a limiter after Hz Box?
The resonator feedback can generate loud transient peaks, especially at higher feedback and Q settings. The developer specifically advises placing a brickwall limiter or clipper across your DAW master bus when using Hz Box to protect your speakers and ears from unexpected volume spikes.
Can Hz Box be used as a send effect for reverb?
Yes. To use Hz Box as a send reverb, set all mixer knobs except Reson to zero so you only hear the resonated (delayed) signal. Enable the Time-Long button for a longer echo time of up to 120ms. Note that this shifts the emulation from a small soundbox to a larger room-like space.
