Analog Color, Played by Ear

A Juno-inspired filter, chorus, and drive plug-in for adding motion, width, and analog color to any source.

QUASAR-106 takes the most-loved signal path in synth history — the Juno-106's filter, drive, and BBD chorus — and rebuilds it from the inside on MNTRA's Anima Circuits™ technology. You get the 24 dB four-pole bite the original gave you, plus a smoother 12 dB slope it never offered. A drive stage that warms and sings instead of clipping. A stereo image that opens up to 2.5× wide. A single Vintage knob that ages the whole circuit. And a reactive iris-and-field surface that turns filter sweeps and chorus motion into something you perform by ear — not draw with a mouse.

THE JUNO, STANDALONE.

Some circuits earn their place in music history. The Roland Juno-106's chorus is one of them — a warm, drifting, BBD-modeled chain that gave a generation of synths their unmistakable shimmer and width. Pair it with the Juno's four-pole resonant filter, and you have one of the most musical signal paths ever shipped in a polysynth. The sound underneath countless records.

QUASAR-106 takes that exact path — filter, drive, chorus — and rebuilds it from the inside. Same soul. New slopes. Modeled circuit motion. A reactive interface. Refined into what we think it always should have been.

ONE FILTER. THREE CHORUS MODES. ONE PLUG-IN.

A punchy Juno-style 24 dB four-pole contour and a smoother 12 dB two-pole mode the hardware never had — both modeled for character, neither one a compromise. Three classic BBD chorus modes (slow and deep, fast and shimmering, or both at once) with a stereo image that opens up to 2.5× at its widest. A vintage-style drive that warms and sings before the filter. A single Vintage knob that ages the whole circuit. And a reactive Perform View that turns the whole signal path into an instrument you play — not a panel you click through.

INTRODUCING ANIMA CIRCUITS™

At the heart of QUASAR-106 is Anima Circuits, MNTRA's analog-modeling research. Most filter plug-ins fake it. They lean on static digital approximations that sound fine in the sweet spot and shatter into harsh clipping and lifeless aliasing the moment you push them. We rebuilt the physics. Anima Circuits models the actual physical behaviour of the original circuitry — real components warming up, real resonance pushing back, real chorus drifting under load.

Crank the resonance into self-oscillation. Drive the input deep into saturation. QUASAR-106 sings, ages, and breathes — without a hint of digital harshness.

VINTAGE AGING, IN A SINGLE KNOB.

Forty years of well-worn electronics, dialed in by ear. Turn Vintage up and the chorus drifts deeper, the high end darkens, the noise floor lifts, and the resonance develops a slow wobble. Clean and modern at zero. Beautifully aged at the top. One control from studio-fresh to forty-years-on-the-road.

PLAY IT, DON'T AUTOMATE IT.

QUASAR-106 doesn't put you in front of a row of knobs. The main interface is the Perform View — a reactive iris ring that drives filter cutoff and resonance, a field behind it that drives chorus depth and stereo width, and a center circle that toggles the filter slope. The interface moves with your signal. Push resonance hard and the iris sings and wobbles. Open the chorus and the field breathes around it. You don't draw an automation lane. You play the circuit.

When you need precision, the Advanced panel exposes every parameter — CUT, RES, DRV, VINT, FILT, CHO — for surgical control.

A SAFE MODE FOR THE STAGE.

High-resonance self-oscillation is one of the most musical sounds a filter can make — and one of the most dangerous in a live set. QUASAR-106's OSC control includes a Safe Mode that lets the filter sing without ever letting it scream. Push resonance with confidence onstage.

REACTIVE. PLAYABLE. ALIVE.

QUASAR-106 runs on the same reactive engine MNTRA uses across the FX line. The iris lights up with your audio. The particle field breathes when the chorus is on. The output meter colour-blends with chorus activity, vintage amount, and drive amount. The plug-in doesn't sit in your session — it lives in it.

Performance Surface — Iris and Field

The Perform View has three controls. The Iris triangle drives filter cutoff (vertical) and resonance (horizontal). The Field bars drive chorus depth (vertical) and stereo width (horizontal). The Center Circle toggles the filter slope between 12 dB and 24 dB. Every parameter is fully automatable in your DAW — iris, field, advanced knobs, chorus mode, filter slope, mixes, and output gain.

One gesture. Many parameters. Animated by audio.

Feature Cards

• Filter — 24 dB + 12 dB — The punchy Juno-style 4-pole contour alongside a smoother 2-pole mode the original never offered. Modeled for character; neither slope is a compromise.
• Use when: a sweep needs either bite or breath without flipping plug-ins
• Chorus — Three BBD Modes — Mode I: slow, deep, oceanic. Mode II: fast, tight, shimmering. Mode I+II: both at once — thick, animated, alive. Stereo width opens up to 2.5× at maximum. Refined into what we think it always should have been.
• Use when: a track needs width, motion, or that unmistakable Juno air.
• Drive — Vintage-Style Saturation — From subtle analog warmth to full harmonic grit. Clean at the top end where digital clipping usually falls apart. The way circuits actually warm up.
• Use when: a clean source needs body, edge, or the colour of being pushed.
• Vintage Aging — Chorus drift. High-end darkening. Rising noise floor. Resonance wobble. Forty years of beautifully aged electronics, dialed in from a single control.
• Use when: a take is too perfect and needs the warmth of well-worn electronics.
• Modeled Circuit Motion — with Safe Mode — Push resonance and the filter sings, wobbles, and pushes back like a physical circuit. OSC Safe Mode keeps it musical on stage.
• Use when: you want self-oscillation onstage without the surprise.
• Reactive Perform View — A particle field, an audio-reactive iris, and a meter whose colour blends with chorus, vintage, and drive activity. The visualisation is the instrument.
• Use when: you'd rather play a circuit than draw an automation lane.

For Producers, Sound Designers, and Mix Engineers

Sweetening a soft synth. Gluing a drum bus. Widening a pad. Sweeping into the drop. QUASAR-106 sits between source and mix as a living signal path — equally at home on an 808, a Rhodes, a vocal bus, or a master. Stack it, layer it, automate it, or play it. The plug-in earns its slot.

Built from Our Anima Circuits™ Research

QUASAR-106 brings MNTRA's analog-modeling research into a focused Juno-inspired effect. Where most filter plug-ins rely on static digital approximations — fine in the sweet spot, brittle at the edges — Anima Circuits models the way real components interact, warm up, and push back when they're driven hard. That's what gives the filter its character. The chorus drifts. The drive retains a musical top end when pushed deep into saturation. It warms up, it sings, and it ages — without a hint of digital harshness.

Within the FLTRS Family

QUASAR-106 is the standalone Juno-inspired circuit from FLTRS — MNTRA's 37-circuit creative filter system. Already running FLTRS? QUASAR-106 shares the same Anima Circuits engine, so it slots naturally inline with the rest of the collection. Not running FLTRS yet? Start with this one circuit — the one that started it all — and let it earn its place in your chain.

• 37 circuits.
• Anima Circuits technology.
• Spectral and physics engines.

The MNTRA FX Ecosystem

QUASAR-106 sits alongside BOREALIS (saturation and mastering dynamics) and BRUITAGE (reactive distortion). All three share the same reactive engine and Anima Circuits behaviour. Stack them and your entire signal chain breathes, moves, and reacts together — one performance, top to bottom.

Offline Mode

After the first activation, QUASAR-106 runs without an internet connection. It supports a 30-day offline grace window after each verification — reconnect within 30 days and the plug-in keeps working normally on any authorized system. Only the initial MNTRA account verification needs to be online. If the grace window lapses without a successful re-verification, the plug-in mutes until you reconnect and sign in again.

Features

• Authorization: No USB dongle required. Seamless MNTRA account login.
• Apple Silicon + Windows. VST3 / AU. Zero latency.
• Formats: VST3, AU
• Systems: Apple Silicon + Windows
• Latency: Zero latency
• Filter: 24 dB + 12 dB modes
• Chorus: 3 BBD modes (I, II, I+II)
• Stereo width: Up to 2.5× at maximum
• Output gain: −12 dB to +12 dB
• Cutoff range: 20 Hz – 12 kHz, logarithmic, default 1 kHz

Tech Specs