High-end audio has gone insane
 

High-End Audio prices are ridiculous. Speakers are gigantic and overwhelm the living room. Most high-end systems still don’t sound like a real concert. And if your partner prefers small speakers?

Forget it — unless you're ready to sacrifice scale, dynamics, and freedom of system tuning. 

You deserve big, emotional, live sound without the giant boxes and without the luxury tax.

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Let’s be honest: high-end audio today suffers from three major problems — and everyone feels them.

1. The price problem

€30,000… €50,000… €100,000 for a pair of loudspeakers.

And what do you get?
  • MDF boxes with shiny paint
  • mediocre drivers
  • marketing fantasy
  • performance that rarely matches the promise
High-end audio pricing is simply not grounded in reality anymore.

2. The size problem (WAF included)

Most brands tell you: “Want big sound? You must buy big loudspeakers.”

Result:
  • huge cabinets dominating your room
  • interior design takes a punch to the face
  • your partner hates the look
  • and even then — many don’t sound truly “big”
The living room turns into a “speaker showroom” and you still don’t get that live concert scale.

3. The freedom problem (Active systems trap you)

To achieve real dynamics and scale, manufacturers push you toward active speakers.But here’s the catch:
  • You lose the freedom to choose your amplifier
  • You lose the ability to tune your system
  • You depend entirely on the built-in electronics
  • When the amp fails, the entire speaker becomes useless
  • You cannot upgrade, experiment, scale, or refine your sound
Active means zero flexibility — and more often than not that’s not the way for most of us.

And despite all that…
 The sound is still often:
  • compressed
  • flat
  • uninvolving
  • lacking physicality
Where is the big, emotional, live-scale experience?

The real question:

Why can’t you have compact speakers that deliver huge, concert-level performance at a fair price and with full system freedom?

They didn’t exist.

So COBRA was created to fix it.
 

COBRA

Compact loudspeaker with the soul of a 15-inch sub and the finesse of a reference AMT monitor

COBRA brings live-concert energy, holography, wall of sound and dynamics into any room. 

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COBRA is a ground-up redesign of what a high-end loudspeaker should be.

It delivers:
  • the physical impact of a large floorstander
  • the scale of a full-range system
  • the air and holography of an open-back dipole
  • the precision of a studio monitor
  • and the freedom of a fully passive design
All in a compact footprint that fits any room — and any interior. COBRA exists because you deserve big sound, not big speakers.

Designed by Grzegorz Rulka

Co-founder of Cube Audio and Qualio Audio, and creator of Virtual HiFi. 20 years of designing world-class drivers and loudspeakers.

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I’m Grzegorz Rulka, and my life is audio.
Over the last 2 decades I’ve:
  • co-created Cube Audio full-range drivers
  • co- created Qualio Audio IQ loudspeakers
  • built a global reputation through Virtual HiFi YouTube Channel
  • developed drivers, crossovers, cabinets, entire speaker systems
  • earned a background in Technical Physics, Engineering, and Nuclear Energetics
But most importantly:
I believe audio is art guided by physics.
You need engineering to build it — and artistry to make it alive.
COBRA is the result of everything I've learned so far.

Three simple steps to your sound revolution:

 

Choose your COBRA

  • Select your Cobra looks
  • Go with Dealer or Direct

We build it for you

  • 3D printed
  • Hand-assembled 
  • Fine-tuned
  • Fully tested in Poland

Try it for 30 days risk-free

If COBRA doesn’t blow your mind

  • Return it
  • No questions
  • No pressure

The Engineering

Cobra uses the finest 7" drivers, supercharged by twelve passive radiators and housed in acoustically dead 3D-printed composite cabinets. With ultra-premium crossover parts and pure signal paths, Cobra delivers explosive bass, flawless detail, and a sound born from true dark-arts engineering.

  •  4× long-throw 7" carbon fibre Epique drivers
  • 12× long-throw 7" carbon fibre Epique passive radiators
  • Equivalent surface area of a 15-inch subwoofer
  • Ultra-damped 3D-printed composite cabinet
  • Open-back Mundorf AMT on isolated suspension
  • Silver WBT NextGen connectors
  • Extreme Quality crossover parts

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1. Massive displacement in a compact box
Each COBRA speaker uses:
  • 2 Dayton Epique long-throw 7" drivers (19mm Xmax)
  • 6 matching Epique 7" passive radiators (19mm Xmax)
This creates the moving air of a 15.5-inch subwoofer — with far lower distortion and better transient speed.


 2. A cabinet designed like no other
 Cabinets are built from:
  • 5mm PETG high dampening 3D printed shell
  • 5mm structural rib bracing to ensure high rigidity 
  • cavities filled with 35A elastomer + stainless steel micro-particles
This creates a highly damped CLD (Constrained Layer Damping) composite structure where vibrations are converted into heat and panel resonance is reduced to nearly zero — resulting in an enclosure that is effectively silent. And all of this is achieved with only 10 mm wall thickness. 

Thanks to the 5 mm PETG shell combined with a 5 mm internal diamond-brace grid filled with 35A elastomer loaded with stainless steel micro-particles, the Cobra enclosure is over 10× more effective at suppressing vibration than a traditional 22 mm MDF cabinet.
 It also preserves almost 20% more internal volume, allowing deeper bass and greater output from the same footprint.
The box disappears — only the music remains.
 


 3. Open-back Mundorf AMT on top
 Mounted on a 3D printed Elastomer TPU isolation frame, not the cabinet.Benefits:
  • Superb vibration isolation
  • pure, airy treble
  • massive holography
  • perfect time alignment
A small speaker shouldn’t sound this big — but COBRA does.

Magic of Passive Radiators 

What’s a Passive Radiator?

A passive radiator is a speaker cone with no magnet. It moves from air pressure inside the box and adds extra deep bass without ports or a big enclosure.

Why They Matter
At low frequencies, passive radiators act like extra woofers.
In Cobra, twelve radiators behave like a 15-inch bass driver  hidden inside each Cobra monitor — giving huge, clean bass.

Why Others Don’t Use Them

They’re expensive. A port costs a few dollars. Cobra’s radiators cost €840.
Most brands skip them. High-end brands? No idea — the performance gains are enormous.

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What’s a Passive Radiator (and Why It Matters)?

A passive radiator is basically a speaker cone without a magnet. It moves only because the air inside the enclosure pushes and pulls it. When the main driver moves, it changes the internal air pressure — and that pressure makes the passive radiators move.

The real magic happens at the resonant frequency, the point where the radiator and the air in the box bounce together naturally. Here, the radiator moves in sync with the main driver and produces a large amount of bass energy.
 
In simple terms:

A passive radiator turns air pressure into extra low-frequency sound, letting a small speaker produce deeper, louder bass without ports or a huge box.

Why Passive Radiators Are So Important
At bass frequencies, passive radiators behave like additional active woofers equal to their combined surface area.

In Cobra, the twelve radiators effectively create the output of a 15-inch woofer inside each tiny monitor.They also let the main driver work in a much smaller enclosure, because the radiators provide the needed “spring” and excursion that normally require a large internal air volume.

A smaller internal volume results in tighter, faster, more controlled bass.

So Why Doesn’t Everyone Use Them? Because they’re expensive.

A basic bass-reflex port costs a few dollars. Each high-performance Epique passive radiator costs €70 — Cobra uses twelve, totalling €840 in radiators alone. For normal consumer speakers, that’s impossible to justify.

And for many high-end brands? Let’s just say their avoidance of passive radiators is… difficult to explain, given how much they improve performance when cost is no object.
 

4 Epique drivers and 12 passive radiators
in 1 pair of Cobra "monitors" 

Magic of Mundorf AMT 

The Mundorf AMT25D1.1 — A World-Class Tweeter

With over 13× the radiating area of a standard dome tweeter and dipole radiation that fills the room from both sides, the AMT25D1.1 delivers unmatched speed, detail, and realism.
 Filtered through Jantzen Amber copper-foil capacitors and mounted on an elastomer-damped frame to eliminate vibrations, it reveals high frequencies with absolute purity.
 

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Why the Mundorf AMT25D1.1 Is So Special

The Mundorf AMT25D1.1 is one of the finest tweeters ever made.

Its pleated diaphragm provides a radiating surface over 13× larger than a typical 1" dome tweeter. More radiating area means more air movement, more effortless dynamics, and a room filled with clean, natural high-frequency energy.
 
Because it’s a dipole AMT, it radiates sound both forward and backward, effectively doubling the acoustic output and creating a huge, open soundstage no dome tweeter can match.

 
Ultra-High-End Crossover Components

To extract the full potential of this tweeter, Cobra uses Jantzen Amber Series copper-foil capacitors — among the most neutral transparent, high-resolution capacitors in the world.

These ensure the AMT sees an ultra-pure, noise-free signal with zero grain or harshness.

 
Vibration-Free Mounting for Maximum Clarity

The AMT is mounted on top of the cabinet, not inside it, using a custom elastomer isolation frame.
This completely decouples the tweeter from cabinet vibrations, dramatically lowering distortion and preserving the AMT’s microscopic detail and transient speed.

The result is a top end that feels weightless, holographic, and astonishingly real.

Ultra High-End Components

COBRA uses components found in €30k–€100k speakers:
 
  • Mundorf AMT Tweeter
  • Dayton Epique Carbon fibre drivers & passive radiators 
  • Jantzen Litz coils
  • Jantzen Amber copper capacitors
  • ClarityCap PUR capacitors 
  • Mundorf Supreme non-inductive resistors
  • WBT NextGen silver terminals
  • Duelund internal cabling
     
    Most high-end speakers hide entry-level components behind luxury cabinets.
    COBRA does not.
    No shortcuts.
    No marketing tricks.
    COBRA is built like a €30,000+ speaker — but sold for €16'900.

The Sound of Cobra

  • Live dynamics
  • Worlds top high frequencies
  • Deep physical bass
  • Huge soundstage
  • Stunning holography 

  • Lifelike vocals
  • Warm, detailed low-volume listening
  • Organic rich and detailed presentation
  • Perfect immersion into the music
  • Zero compression at high SPL 

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Bass
Immediate, deep, physical — the kind that pushes air and hits your chest.

Dynamics
Explosive, effortless, alive.
Drums sound like drums.
Pianos have weight and authority.

 Soundstage
Open, holographic, three-dimensional.
The AMT fills the room with air and realism.

Low-volume beauty
Warm, textured, detailed — even at whisper levels.

High SPL stabilityPlays loud without breaking a sweat.
No strain, no distortion, no compression.

Big speakers?
You don’t need them anymore.

 

Listen to the Cobra recorded with 

High End Microphones

 

Cobra Reviews

"By late November 2025, I found myself once again staring at a personal first: true unconditional  full-range performance bottled by a passive bookshelf speaker then uncorked at a scale that just shouldn't be." 

"Once more, Cobra's tweeter preceded by its custom silver/gold wiring and filter parts overtook my former triumvirate to usurp the Treble High Throne."

"Where Viper is still sane, Cobra is completely bonkers " -

 Srajan Ebaen, 6moons.com
 

Where's the Catch? 

To control the long-throw woofers and passive radiators system, all you need:
  • 200–500W per channel at 4Ω
  • Class D or Class AB recommended
  • Good damping factor for bass control 

Cobra will adjust to your needs

Every room is different. Every system is different. Every listener is different. 
COBRA solves this elegantly:

  • 5-step plug-in resistor system
  • Adjusts the relative level of the open-back AMT
  • Zero-loss pure silver WBT Nextgen RCA plug
  • No sound-degrading switches
  • Zero compression at high SPL
  • Takes 5 seconds to change
Warm. Neutral. Studio. Airy. Choose your world.
 

Customization

COBRA is printed to order using premium BambuLab and FiberLogy materials.
You can choose:
  • Cabinet colors
  • Front panel colors
  • Finishes
  • Bespoke options (case by case)
  • Front panels are magnetic — swap them anytime.
  • Each pair is handcrafted in Poland with full attention to detail.

Limited Production

COBRA is not mass-produced.
 Every pair is:
  • 3D printed with combined print time of 600 Hours
  • Hand assembled in Poland
  • Individually tested for 100 hours
  • Production is limited.

If the queue is full, you wait — quality comes first.
 

Choose the way to buy

Dealer
 
€16,900 including VAT / Tariffs
 

  • All shipping cost, taxes and duties included

  • Local support and assistance

  • Easiest experience — no shipping or import steps on your end

  • Immediate access to local service

  • Just let us know we will arrange everything with your dealer

Factory Direct
 
€9,500 plus VAT / Tariffs

  • Factory-Direct 

  • Worldwide insured airmail included

  • Direct relationship with the makers of your speaker

  • Ultimate value for international customers in low-tax or no-tax regions

  • Ideal for those comfortable with self-importing the Viper speakers

  • All shipping cost, taxes and duties included

  • Local support and assistance

  • Easiest experience — no shipping or import steps on your end

  • Immediate access to local service

  • Just let us know we will arrange everything with your dealer

  • Factory-Direct Advantage

  • Worldwide insured airmail included

  • Direct relationship with the designer

  • Ultimate value for international customers in low-tax or no-tax regions

  • Ideal for those comfortable with self-importing the Cobra speakers

Same product. Two ways to own it. You Decide the most convinient way for you.

Try COBRA at home for 30 days.
 

COBRA is built for people who want to experience music, not marketing.
 
And the best way to know if it’s right for you?
 
  • Hear it at home
  • On your system
  • In your room
  • With your music
     
If you don’t fall in love, return it within 30 days.
No questions. No pressure.

Experience real high-end. 
On your terms. 

 

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Buy at Local Dealer 

High End Sound

3 Years Warranty

Local Service

Premium Local Assistance

Tell us where you live and what electronics you plan to pair with the Cobra.
We’ll connect you with a trusted dealer in your area who can import the speakers and help you get the perfect setup.

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Buy Factory Direct

High End Sound

3 Years Warranty

30 Days Return

Free Worldwide Shipping
Cobra Monitor
Cobra Monitor

Price shown is for a pair of Cobra monitors purchased direct from the factory. 
Stands are not included. 
Orders are fulfilled in the sequence they are received. 

For EU residents, VAT is added at checkout.

A 23% VAT applies to all European orders. If you are purchasing for a business and have a valid EU VAT number, contact us to receive a 0% VAT invoice.

Complimentary Worldwide Shipping.

We ship all Viper monitors via FedEx, with fully insured, trackable delivery.
You can expect your order to arrive in approximately 1 week from the shipping date.

Orders shipped outside the EU may be subject to local taxes or import duties.

You may also be required to complete a shipping/import form sent by FedEx via email.
Taxes and tariffs depend on your country’s local regulations. For example, the current U.S. tariff on EU products is 15%.
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