Integer Audio · GroundControl Nodal Series
The bass that sounds right in your studio isn't the bass in the recording — it's your room's resonances added on top. The Nodal Series removes them.
Every rectangular room resonates at specific bass frequencies. Sound bounces between parallel walls and builds up into standing waves — room modes — that make certain notes ring for a second or more after the music stops. Other notes are artificially quiet. The result is that every mixing decision you make in the bass is filtered through your room's own frequency response.
Standard acoustic treatment — foam panels, hanging baffles, rockwool corner traps — works above 200 Hz. Below 100 Hz, these materials need to be impractically thick to have any effect. A 4-inch foam panel does almost nothing at 55 Hz. Many small studios are completely untreated in the one frequency range that matters most for mixing.
In a typical untreated small to medium studio, the room is still ringing audibly at 55 Hz for over a second after the music stops. Your monitors go silent. The room keeps playing.
The Nodal Series uses tuned resonant absorption — a diaphragmatic piston mechanism — to address bass modes efficiently at 238 mm total depth, without filling your corners with thick absorbers.
Each unit is a sealed-cavity Tuned Diaphragmatic Absorber (TDA): a Richlite membrane with compliant bonding to a Baltic birch frame, acting as a decoupled rigid piston. When bass at the target frequency strikes the membrane, it resonates and dissipates acoustic energy as heat through the Owens Corning 705 cavity fill. Tuned absorption. Minimal depth. Corner placement where modal energy is highest.
Both units share the same exterior dimensions. Q factor — and therefore absorption bandwidth — is individually set within the cavity.
Richlite + MLV · Q 1.0 · wide bandwidth · maximum sub-bass reach
Richlite · no MLV · Q 0.9 · wide bandwidth · overlaps and extends Nodal 40
Up to three Nodal units stacked in a corner — any combination of Nodal 40 and Nodal 50. Nodal 40 at the bottom where sub-bass pressure is highest, additional units above. All units share the same 625 mm wide exterior. Step through the assembly and drag to inspect from any angle.
Enter your room dimensions and see the predicted T60 reduction at each tuning frequency with different Nodal configurations. The simulation uses the Eyring acoustic model with the Nodal Series absorption parameters.
Enter your room dimensions, wall materials, and number of units. The simulator shows predicted RT60 curves before and after treatment — so you know what to expect before spending anything.
Free to use. No registration required.
CNC-cut 15 mm Baltic birch plywood frame with a clear hardwax oil finish. Richlite membrane panels finished with Hardwax Oil to an obsidian matte black. A 6 mm birch ply reveal borders the membrane on all four sides — airtight, and acoustically neutral.
The Nodal Series is currently in pre-production. Register your interest to be notified when units are available, receive pricing information first, and get access to the full technical guide.
© 2026 Integer Audio LLC · Specifications subject to change pending prototype validation