MADO™ Stony™ — flagship handcrafted open baffle speaker on white background with real stone front panel and Koupler™ Karlson waveguide

The Stony™

Where Stone Meets Sound

The flagship open baffle speaker. Real stone on the front and base — dense and heavy, creating a solid launch pad for sound. When the drivers vibrate, the stone doesn't move. Beautiful and effective.

Five drivers. Working through a slot-fired design: the 10" woofers fire through a 2.5" slot, increasing velocity and pressure to project bass that open baffles aren't supposed to have. The Koupler™ waveguide crowns the top — a coherent high-frequency presence unlike any conventional tweeter.

Custom stone and reclaimed hardwood options available — from granite to Carrara marble, oak to cherry and walnut. Every pair built to order in Elgin, Illinois.

Dual 10" woofers · 4" midrange · 1½" AMT · Koupler™ waveguide w/ 1" compression driver

60–80 lbs each · 4–6 week lead time · Custom stone & wood options

From $6,999 / pair

Inquire About Stony™

Specifications

Five Drivers. Zero Compromise.

Drivers

Dual 10" slot-fired woofers
4" dedicated midrange
1½" Air Motion Transformer (AMT)
Koupler™ waveguide with 1" compression driver

Construction

Real stone front panel & base
Reclaimed hardwood cabinet
Open baffle design
Slot-fired bass (2.5" slot)

Details

60–80 lbs each
4–6 week build time
Custom stone options: granite, marble, slate
Custom wood: oak, cherry, walnut, exotic

Design Philosophy

Why Stone?

Stone isn't decoration — it's engineering. A speaker cabinet vibrates. That vibration colors the sound. Stone doesn't vibrate. It's dense, heavy, and acoustically dead. The woofers push air, the stone stays still. What you hear is the driver, not the cabinet.

The open baffle design eliminates box coloration entirely. Sound radiates naturally front and back as a true dipole. The slot-fired bass design overcomes the low-frequency rolloff that limits most open baffles — the 10" woofers fire through a 2.5" slot, compressing air and increasing velocity to deliver bass with authority.

And at the top, the Koupler™ waveguide — Stephen's evolution of the Karlson principle. Coherent high frequency with wide dispersion. It sounds the same at 3 feet and 30 feet. No sweet spot required.

Gallery

Every Angle, Every Detail

MADO™ Stony™ pair on white background from left angle

MADO™ Stony™ rear view on white background

MADO™ Stony™ pair front angle view on white background

MADO™ Stony™ Koupler™ close-up detail on white background

MADO™ Stony™ full front view on white background

Experience the Stony™

Ready to Listen?

Every pair is handcrafted and built to order. Contact Stephen to discuss your stone and wood preferences, or arrange a personal listening session at his workshop in Elgin, Illinois.

Get in Touch See Us at AXPONA 2026

Where Stone Meets Sound

Five Drivers. Zero Compromise.

Drivers

Construction

Details

Why Stone?

Every Angle, Every Detail

Ready to Listen?

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