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COAX 811


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WHAT DOES THE COAX SERIES SIGNIFY FOR PIEGA?
The Coax series is probably the most important one for PIEGA because it shapes the perception of our brand like no other. Meticulous Swiss craftsmanship and its singular coaxial ribbon embody the essence of what PIEGA stands for. With four 22 cm woofers, the Coax 711 in particular, leaves no doubt that Kurt has created a remarkable loudspeaker and a true classic.

The Coax has been a significant revenue driver for many years. Nonetheless, or perhaps precisely for that reason, it was time for a complete makeover.
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WHAT PART OF THE COAX SERIES WAS OPTIMIZED?
Everything! *laughs*

No, seriously, every single aspect has been analyzed, scrutinized, and improved.


The most obvious being its new size and shape to create an even larger cabinet volume.

The cabinet has been acoustically enhanced so that the rear sound proportion in the lower midrange is better absorbed. The additional volume helps produce clean, dry, and thus full-bodied basses.

A larger cabinet inevitably leads to adjustments in the “Tension Improve Module” (TIM). As a result of the larger surfaces, the cabinet tends to resonate more, which has an immediate impact on the sound quality.
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WHAT SPECIFIC CHANGES ARE YOU REFERRING TO?
Until now, the “Tension Improve Module” (TIM) put the speaker cabinet under controlled tension by applying pressure to the inner walls, which effectively calmed cabinet vibrations.

The new TIM2 is put under tensile stress and positively bolted to the cabinet for even better results. This ensures the rigidness of the construction and keeps the bass as it should be: dry and accurate.

Picture 1: First generation

Picture 2: Second generation

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DID YOU TOUCH THE SPEAKER’S CORE, THE COAX MID-HIGH RANGE DRIVER?

Yes, of course. That’s where we made the most significant changes. An additional neodymium magnet above the tweeter gives it a higher efficiency, particularly in the Coax 811 – with pretty cool acoustic results. The front panel has been stiffened with an extra cross-bracing so the magnets could be “soft” glued, eliminating annoying resonances.

Exclusively, a newly developed special coating on the foil is used. This linearizes the frequency response in the lower transmission range and allows a lower transition to the woofer. The coax driver thus emits sounds from 450 Hz. The sensitive range of vocals is reproduced flawlessly, contributing to a well-balanced and neutral sound pattern.


Picture 1: First generation

Picture 2: Second generation

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THAT SOUNDS LIKE A GREAT DEAL OF EFFORT! DOES IT REFLECT IN THE RESULT?

It certainly does!

Our coaxial ribbon system offers advantages you can’t find in ordinary midrange drivers for love nor money.

The speaker’s “engine” is simultaneously its membrane and thus the sound generating part. This guarantees a fantastic performance – a great deal of horsepower per kilogram!

In addition, the tweeter and midrange drivers have been arranged coaxially on one level. This creates a point source at which the position of the sound reproduction remains unchanged across a wider frequency range, which is ideal for natural vocals. In reality, a voice only comes from one point, after all.

Technical Data

Design
3-way system floor-standing speaker
Recommended amplifier power
20 – 250 watts
Sensitivity
92 dB/W/m
Impedance
4 ohms
Frequency response
22 Hz – 50 kHz
Equipment
2 × 220 mm UHQD woofers
2 × 220 mm UHQD passive radiators
1 × C212+ coaxial ribbon
Cabinet
Extruded aluminum with Tension Improve Module 2 (TIM2)
Abmessungen (H × W × D)
124 × 29 × 42 cm
Weight
63 kg
Colour variants
Aluminum cabinet brushed, silver / speaker grille cloth silver
Aluminum cabinet brushed, black anodized / speaker grille cloth black
Aluminum cabinet, white-lacquered finish / speaker grille cloth white

Special colours: Blue Lagoon, Misty Green, Shiny Ash, Desert Gold, Bordeaux Red, Havanna Tobacco, Autumn Bronze and Alpine Stone.

Coax Gen2 Series

The loudspeakers of the Coax Gen2 Series can play any musical piece with incredible precision. The simultaneous transfer of all high and midrange frequencies produces a clear, natural, and immaculate sound image. Thanks to Coax Excellence, additional colour options are now also available.

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COAX 811
With incredible dynamics, spatiality, and resolution, the series' flagship showcases every type of sound – for music enthusiasts who strive for nothing but the best.
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COAX 611
The slender Coax 611 inspires with its equally natural and vibrant sound diversity.
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COAX 411
A compact coaxial bookshelf speaker with a remarkably large soundscape.
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COAX CENTER 211
With elegance and outstanding speech intelligibility, this center speaker promises movie nights at the highest sound quality level.