The Little Labs IBP Jr is a indispensable secret weapon for modern tracking and mixing setups. If you routinely record sources with multiple microphones or combine mic and DI signals, the IBP Jr instantly retrieves missing low-end punch and mid-range clarity with a turn of a single knob.

The Little Labs IBP Jr (In-Between Phase) is a compact, single-slot 500 Series module engineered to solve complex phase alignment challenges in critical recording and mixing applications. Building upon the legacy of the original full-rack Little Labs IBP, the IBP Jr provides continuous, analog phase-adjustment technology, enabling engineers to eliminate comb filtering and frequency cancellation between multiple microphone or direct signal sources without relying on digital delay plugins or physical microphone repositioning.

Operating entirely in the analog domain, the IBP Jr features a continuously variable phase control that sweeps smoothly from $0^\circ \text{ to } 180^\circ$ (or $180^\circ \text{ to } 360^\circ$ when the phase-invert switch is engaged). This allows precise phase matching across multi-mic instrument setups—such as top and bottom snare mics, acoustic guitars, or combined mic-and-DI signals on electric bass and kick drums. The result is a fuller, tighter low-end response and restored mid-range punch.

In addition to its primary phase-alignment duties, the IBP Jr includes a built-in audiophile-grade direct box (DI) and a re-amp output stage. The instrument DI input allows passive or active instruments to be recorded directly while simultaneously aligning their phase against a room or amplifier microphone. With transformer-isolated output options and rugged construction, the IBP Jr is an essential utility tool for tracking and mix engineers seeking uncompromised phase accuracy.

Key Features

• Continuously Variable Phase Adjustment: Smooth analog control allows precise phase-angle sweeping ($0^\circ \text{ to } 180^\circ$) to eliminate comb filtering and restore natural low-end punch.

• $180^\circ$ Phase Invert Switch: Expands phase-adjustment range from $180^\circ \text{ to } 360^\circ$, granting total $360^\circ$ alignment capability across any complex multi-mic setup.

• Integrated High-Quality Direct Box: Front-panel hi-Z instrument input enables direct instrument tracking while simultaneously phase-aligning the DI signal to an amp or room microphone.

• Re-Amp & Splitter Functionality: Line-level input capability lets you feed pre-recorded tracks back through the unit to align phase during mixdown or send signals out to external amplifiers.

• Center Frequency Switch: Selects between high and low center-frequency curves for the phase-shifting circuit, allowing targeted phase adjustments tailored to low-end bass or mid-range vocal/acoustic sources.

• Compact 500 Series Format: Integrates Little Labs' acclaimed phase-alignment technology into a single-slot module for modern rack systems.