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Callens Audio Labs

Dutch & Dutch dealer for Lausanne and beyond. Studio-grade listening, done right.

Lausanne region, Switzerland

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How the 8c works with your room

Most speakers fight the room. The Dutch & Dutch 8c was designed to make it a useful extension. Scroll to see how.

Scroll down to begin the animation

01 — Omnidirectional radiation

The problem with conventional speakers

Imagine listening to a concert recording in your living room. A traditional loudspeaker radiates bass in all directions — like a bare light bulb. These reflections layer your room's own acoustic signature over the recording venue's. Standing waves, comb filtering, and muddy bass — you're hearing two rooms at once.

02 — Directional by design

Acoustic cardioid dispersion

The 8c eliminates your room from the equation. Using the back-wave of its midrange driver and side cabinet vents, it creates a cardioid radiation pattern — sound is focused forward while rear energy is acoustically cancelled. The back wall virtually disappears. You hear the concert hall, not your living room.

03 — The wall becomes an ally

Boundary-coupled bass

Twin rear-firing woofers couple with the wall behind them. This gives the 8c three major advantages: no destructive interference between direct and reflected bass, +6 dB of dynamic headroom (the wall does real work), and directivity that matches the cardioid midrange. Place it just 10–50 cm from a solid, rigid wall — the closer, the better. Note: BCB requires a solid wall to function as designed.

04 — Controlled from 100 Hz up

Constant directivity waveguide

From 100 Hz upward, a proprietary waveguide ensures the tweeter's dispersion matches the midrange driver. The result is consistent frequency response across a wide listening area — the same tonal balance whether you're in the sweet spot or off to the side. No hot seat, no dead zones.

05 — Acoustics first, DSP second

RoomMatching

Acoustics first, then digital refinement. After solving room interaction by design, the built-in DSP handles what physics cannot: room EQ based on actual measurements, boundary compensation tuned to your exact wall distances, and parametric filters — all configurable from the companion app. The result is measurable and audible.

06 — Studio accuracy, any room

The result

Frequency response from 20 Hz upward. Constant directivity from 100 Hz. Full range at 106 dB continuous. In any room, close to any wall. What you hear is what was recorded — nothing added, nothing left out. The speaker disappears; the music remains.

REAR WALLFRONT10–50 cm5.4 m4.4 mROOM EQ20 Hz20 kHztargetminimalminimalSpeakerSpeaker8c8clistener

The technology in depth

01

Cardioid dispersion: making the room disappear

Imagine an orchestra playing in a famous concert hall. The acoustics of that hall — its reverb, its warmth, its sense of space — are integral to the recording. Now play that recording through conventional speakers in your living room: your room's own reflections layer on top of the concert hall's acoustics. You end up hearing two rooms at once.

The 8c solves this at the source. Side-mounted vents use the back-wave energy from the midrange driver to create an acoustic cardioid pattern — sound radiates forward while rear and side energy is cancelled. The back wall effectively disappears as a source of reflections. You hear the concert hall, not your living room.

Normally, this approach would introduce phase and frequency response problems. Dutch & Dutch's internal DSP corrects for these in real time, preserving a flat, accurate response. This technique is well-known in professional audio, but implementing it in a domestic loudspeaker at this level of refinement is extremely rare.

02

Boundary Coupled Bass: the wall as an acoustic partner

Most speakers are designed to be placed away from walls. The 8c does the opposite: its twin rear-firing woofers are engineered to couple with the wall behind them. This design, inspired by the pioneering work of loudspeaker designer Roy Allison, turns what is normally a problem — bass reflections from nearby boundaries — into an advantage.

Boundary Coupled Bass provides three key benefits. First, it eliminates destructive interference between direct bass and reflected bass, which plagues conventional speakers near walls. Second, the wall reinforcement adds up to 6 dB of dynamic headroom — real, usable output gained from physics, not from bigger amplifiers. Third, the increased directivity in the bass matches the cardioid midrange above 100 Hz, ensuring consistent dispersion across the full frequency range.

For BCB to work as designed, the 8c needs a solid, rigid wall behind it — concrete, brick, or dense construction. Place it 10 to 50 cm from that wall, and the speaker and boundary combine into a single, phase-coherent source. The built-in distance presets handle the rest.

03

Constant directivity waveguide

From 100 Hz upward, a proprietary waveguide matches the tweeter's dispersion pattern to the midrange driver's. This means the same tonal balance reaches you whether you're sitting in the sweet spot, leaning to one side, or standing up. There's no hot seat and no dead zones — just a wide, consistent listening area.

This directivity matching is key to how the 8c sounds in real rooms. When the speaker's off-axis response is smooth and controlled, room reflections carry the same tonal character as the direct sound. The result is a natural, spacious presentation that doesn't collapse or change character as you move.

04

RoomMatching: acoustics first, DSP second

After solving room interaction through acoustic design, the 8c's built-in DSP handles the fine-tuning that physics alone cannot. RoomMatching includes boundary compensation calibrated to your exact wall distances, room EQ based on actual measurements, and a full parametric equalizer — all configurable from the companion app or web interface.

This is where tools like REW (Room EQ Wizard) come in. During professional setup, we measure your room's response and feed the results into the 8c's DSP. The speaker adapts to your specific environment — not with generic presets, but with precise corrections based on real data. The result is measurable and audible: flat response from 20 Hz, in your room, with your placement.

Hear the difference yourself

Theory is one thing. Listening is another. Book a demo and experience room-corrected sound in person.