“Huge clean headroom,
spring drip, and
hypnotic tube tremolo”
The fixed-bias 6L6GC-style power section and stiff supply are tuned for fast attack, broad lows, and confident clean headroom. Instead of loose sag, Duo Reverb gives you a solid platform that keeps pedals clear and chords intact.
The built-in spring reverb and tube-style tremolo turn a clean amp into a complete atmosphere. Add a subtle studio halo, a deep surf wash, or a slow vintage pulse while the dry tone stays focused and present.
What do the knobs actually do?
Sets how hard the selected channel drives the preamp. Keep it low for wide, pristine cleans, or raise it for more edge, harmonic push, and touch-sensitive bite.
Shapes the top end of the passive American tone stack, adding sparkle, pick definition, and glassy clean chime.
Controls the guitar's forward presence. Raise it for more body and authority, or pull it back for a spacious, scooped clean sound.
Sets low-end weight. Add fullness without losing the tight, composed feel that makes the amp work so well as a pedal platform.
Blends in spring reverb, from a subtle room-like halo to a wet, drippy surf wash around the note.
Controls the tremolo rate, from a slow, lazy shimmer to a faster rhythmic pulse.
Sets tremolo depth. Use low settings for gentle movement or push it higher for an unmistakable vintage volume pulse.
Sets final output level, so you can keep the amp full, clean, and wide without overloading the session.
Selects Normal, Vibrato, or Jumpered operation. Jumpered mode blends both channel voices for extra color, thickness, and push.
Adds a bright-cap-style lift for extra bite and clarity, especially at lower volume settings.
Universal architecture
These are the ideas, design philosophies, and shared technical choices common to every Smear Audio amp. They are not one-off product notes or model-specific feature lists, but the baseline assumptions behind how we build our amplifier plugins.
Instead of running our software through a single, compromise-heavy digital grid, every individual tube stage is calculated independently in real time.
Getting a software plugin to feed back naturally without a roaring 4x12 cabinet physically vibrating your guitar strings used to be a pipe dream. Our proprietary Ghost Bloom engine changes the game by emulating physical acoustic feedback with breathtaking realism.
An extraordinary amplifier needs a real environment to breathe. Our unified speaker platform offers six distinct, classically voiced cabinet models, paired with an intuitive three-dimensional mic room.
In the real world, the perfect alternative or shoegaze tone almost always starts with a great pedal slamming the front end of an amp. We have hardwired two switchable, analog-modeled boost circuits directly into the top bar of every interface.
Fender and Twin Reverb are trademarks of Fender Musical Instruments Corporation. Duo Reverb is an independently developed product and is not affiliated with, endorsed by, sponsored by, or licensed by Fender Musical Instruments Corporation. All other trademarks are the property of their respective owners.
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