Tantrum Audio NEXUS Hardware Room Correction Processor

The Tantrum Audio NEXUS is a compact, line-level DSP speaker processor designed to deliver time aligned, room corrected audio across DAWs, laptops, and external playback devices. Operating entirely on internal hardware with a processing latency of just $1\text{ ms}$, NEXUS sits directly between your audio sources and active studio monitors or amplifier systems. By housing all corrective EQ, delay, phase alignment, and crossover functions on the device itself, NEXUS functions completely standalone, ensuring your room calibration remains perfectly active even when your DAW computer is off or disconnected.

Every NEXUS includes Omnissiah, Tantrum Audio’s license and subscription free room measurement software for macOS, Windows, and Linux. Omnissiah measures your listening position using any standard measurement microphone and generates diagnostic cards for each channel. It explains what acoustic anomalies were corrected, what was deliberately left untouched, and why. Once written to the unit, NEXUS runs independently in hardware.

Designed for stereo mains and 2.1 subwoofer configurations, NEXUS aligns monitors and subwoofers down to the millisecond using per-output delay, high-pass/low-pass crossovers and all pass phase rotators. With two balanced analogue line inputs, a $3.5\text{mm}$ stereo aux input, S/PDIF, and USB-C audio streaming, NEXUS acts as a centralised monitoring hub. Comprehensive macro mapping allows virtually any parameter to be controlled remotely via MIDI or OSC control surfaces.

Key Features

• Hardware-Based Room Correction: Runs corrective FIR/IIR filters directly on the device with an ultra-low $1\text{ ms}$ processing latency.

• Time-Aligned 2.1 Speaker Crossover: Independent delay (up to $10\text{ ms}$), polarity, phase rotators, and crossovers per output so subwoofers and main monitors arrive at the listening position simultaneously.

• Four Simultaneous Input Sources: Accommodates balanced $+20\text{ dBu}$ analogue inputs, $3.5\text{mm}$stereo aux, coaxial S/PDIF (up to $96\text{ kHz}$), and USB-C digital audio (up to $192\text{ kHz}$).

• Standalone DSP Operation: Once programmed via Omnissiah, settings persist onboard; no DAW plugins, background apps, or computer connections required for playback.

• Omnissiah Measurement Suite Included: Perpetual software license with plain-language channel reporting; works with any measurement microphone.

• MIDI & OSC Macro Control: Seamlessly map volume control, preset switching, A/B reference toggles, and mute functions to hardware surfaces, tablet apps, or console GPIs.

• Ultra-Quiet Audio Performance: Pristine audio specs featuring a $120\text{ dB}$ noise floor and $0.0013\mathrm{\%}$THD.

Technical Specifications

• Form Factor: Compact Desktop / 1U High Rackable Unit ($169.6\text{ mm}\times 43\text{ mm}\times 100\text{ mm}$; Weight: $600\text{ g}$)

• Processing Latency: $1\text{ ms}$

• Noise Floor: $120\text{ dB}$

• Total Harmonic Distortion (THD): $0.0013\mathrm{\%}$

• Supported Sample Rates: Up to $192\text{ kHz}$

• Audio Inputs:

  • Main Analogue Input: 2 Channels, $+20\text{ dBu}$ max, Balanced $1\mathrm{/}4\mathrm{"}$ TRS

  • Aux Analogue Input: Stereo Line-Level $3.5\text{mm}$ Jack

  • S/PDIF: 2 Channels Coaxial (Up to $96\text{ kHz}$)

  • USB Audio: 2 Channels Playback (UAC over USB-C, Up to $192\text{ kHz}$)

• Audio Outputs:

  • Main Analogue Outputs (1 & 2): $+18\text{ dBu}$ max, Balanced $1\mathrm{/}4\mathrm{"}$ TRS

  • Sub Analogue Output (3): $+18\text{ dBu}$ max, Balanced $1\mathrm{/}4\mathrm{"}$ TRS (Subwoofer / Mono / Utility)

  • USB Audio: 2 Channels Record (UAC over USB-C, Up to $192\text{ kHz}$)

• DSP Features:

  • Filters: 15 Filters per Output (Parametric EQ, All-Pass)

  • Crossovers: $24\text{ dB/octave}$ Linkwitz-Riley or Butterworth (High-Pass / Low-Pass)

  • Time Alignment: Up to $10\text{ ms}$ per output with phase rotators

• Remote Protocols: MIDI & OSC (User-named macros for volume, routing, mute, preset recall, and bypass)

• Software: Omnissiah Configuration Suite (macOS, Windows, Linux included; no subscription)

• Power Supply: USB-C Powered ($5\text{V},0.5\text{A}$)