San Francisco Bay Area dealership Audio Federations first encountered the Acapella Audio Arts spherical horn, ion plasma tweeter speaker system at CES 2002, before becoming its first U.S. dealer shortly afterwards and now its U.S. Importer. Bay area audiophiles and music lovers were able to experience the speakers at 2017 and 2018 California Audio Shows.
Founded over 40 years ago in Duisburg, Germany by Hermann Winters and Alfred Rudolph, Acapella today offers thirteen complete speaker systems listed below, ranging from the $20,500 per pair High Fidelio 2 MK III to the $362,000 per pair Sphaeron Excalibur. Those who heard the spherical horn and the ion plasma tweeter would not forget the experience easily.
Audio Federation
Acapella Audio Arts
Sensitivity (active Tweeter): 1,5Volt / 0 dB
Impedance: 600 Ohm
Sound pressure level: max. 110 dB – 1 m / 1ms
Slope Input filter: approx. 12dB/octave
Frequency response: 5kHz – >50kHz (variable crossover frequencies )
Mains voltage: 234 Volt / 50 Hz Standard
Optional 110 -, 117 -, 227 Volt / 50 – 60 Hz
Dimensions H x W x D: 150 x 300 x 260 mm
Weight: 15 kg
Sphaeron Excalibur
Size: 230 x 150 x 130 (HxWxD)
Efficiency: >100dB/1W/1m
Long term power handling: 100 W continuous; 1000 W peak (10 ms)
Recommended amp power: from 15 W sinus/4 Ohm
Weight: 620 kg per System
Room size: from 40 m²
Poseidon
Bass: 20 Hz – 400 Hz with 12 x 10 “drivers
Midrange: 400 Hz – 6000 Hz with 780 mm hyper spherical Horn MT
High Frequency: 6000 Hz – 40 kHz with TW1
Bass: 4 bass modules with 3 x 10 “drivers drive with compound
Midrange: hyper spherical Horn with 780 mm diameter and 2 “driver with perfect phase relationship, and omnidirectional
Tweeter: ion with spherical horn tweeter
Overall Frequency Response: 20 Hz – 40 kHz
Efficiency: ~ 99 dB / 1 W / 1 m
Power consumption: 18 watts
Impedance:> = 6 ohms
Dimensions (HxWxD) without horn: 2300 x 720 x 810 (expressed in millimeters)
Dimensions (HxWxD) with horn: 2300 x 780 x 1000 (expressed in millimeters)
Weight: ~ 600 kg
Triolon Excalibur Mk V
Efficiency: 94 dB / W / m
Impedance: 4 Ohm
Load capacity: 200 W – 1000 W / 10 ms
Dimensions H x W x D: Total 2160 x 1087 x 950 mm
Woofer 2160 x 350 x 703 mm
Sword 2100 x 387 x 415 mm
Weight: approx. 400 kg
Recommended power output of the amplifier from: 15 W
The pair of Triolon speakers is shipped in 2 crates (one for the two heavy 600 lb. tower units and one crate for both ‘swords’).
Apollon
Bass: 20 Hz – 350 Hz with 6 x 10 “drivers
Midrange: 350 Hz – 6000 Hz with 780 mm hyper spherical Horn
High Frequency: 6000 Hz – 40 kHz with TW1
Construction:
Bass: bass modules with 6 x 10 “drivers
Midrange: hyper spherical Horn with 780 mm diameter and 2 “driver with perfect phase relationship, and omnidirectional
Tweeter: ion with spherical horn tweeter
Overall Frequency Response: 20 Hz – 40 kHz
Efficiency: ~ 99 dB / 1 W / 1 m
Power consumption: 15 watts
Impedance: 8 ohms
Dimensions (HxWxD) without horn: 2300 x 380 x 810 (expressed in millimeters)
Dimensions (HxWxD) with horn: 2300 x 780 x 1000 (expressed in millimeters)
Weight: ~ 320 kg
Apollon: Acapella has developed a floor to ceiling speaker that can be placed even in the smallest spaces with its slim housing. Fine adjustments to the ion tweeter and the midrange horn unit can be made in order to adapt the loudspeaker to every acoustical environment. The hyper spherical midrange horn transmits the range of 350Hz – 6kHz and thus an area of more than four octaves. This is the most sensitive hearing range of the human ear. Six bass drivers with 10 inch diameter produce the musical base in the lower frequency range.
Atlas
Overall Frequency Response: 20 Hz – 40 kHz
Efficiency: ~ 93 dB / 1 W / 1 m
Impedance 8 Ohm, Load capacity: 100 W – 1000 W / 10 ms
Recommended power output of the amplifier: from 15 W
Dimensions (HxWxD) without horn: 160 cm x 38 cm x 76 cm
Dimensions (HxWxD) with horn: 189 cm x 78 cm x 94 cm
Weight: ~ 140 kg
Acapella first used a hyper-spherical midrange horn in the Acapella “Poseydon” and “Apollon” speakers. This horn configuration offers an extraordinarily open and transparent sound in a more compact home loudspeaker system.The pair of Atlas speakers is shipped in 3 crates (two tower units and one crate for both horns). The tweeters are shipped already installed inside the tower enclosures.
Campanile 2
Efficiency: 95 dB / W / m
Impedance: 8 Ohm
Load capacity: 200 W – 1000 W / 10 ms
Dimensions H x W x D: Body 2400 x 350 x 660 mm
Total (Horn) 2400 x 720 x 970 mm
Special 2280 x 720 x 970 mm
Weight: approx. 200 kg
Recommended power output of the amplifier: from 15 W
Campanile 2: This Acapella classic has been updated to include a center mounted hyperspherical horn, like the larger Apollon and Poseydon.
High Violoncello II Mk II
Dimensions: 154 x 40 x 55 cm
Dimensions High version: 162 x 47 x 69 cm
Weight: 140 kg
Recommended power: 100 W
Maximum power: 1000 W
Cellini
Overall Frequency Response: 28 Hz – 40 kHz, Efficiency: ~ 91 dB / 1 W / 1 m
Impedance 8 Ohm, Load capacity: 100 W – 1000 W / 10 ms
Recommended power output of the amplifier: from 15 W
Dimensions (HxWxD) without horn: 1490 x 330 x 475 mm (4,89 x 1,08 x 1,56 feet)
Dimensions (HxWxD) with horn: 1705 x 620 x 585 mm (5,59 x 2,03 x 1,91 feet)
Weight: ~ 105 kg (230 lb), High Version 120 kg (265 lb)
The Cellini is a new (2015) speaker from Acapella. It can be thought of as a slightly larger Violon but with a hyperspherical horn. Acapella first used a hyper spherical midrange horn in the Poseydon speakers. This horn configuration offers an extraordinarily open and transparent sound in a more compact home loud speaker system.
This highly musical midrange is traditional accompanied by the Acapella Ion Tweeter TW 1. The bass foundation is provided in a sleek housing that also serves as the support for the Ion Tweeter and the spherical horn. The complete system recreates the sound of any type of music with absolute authenticity and a certain mysterious magic.
Violon Mk VI
Efficiency: 91 dB / W / m
Impedance: 8 Ohm (High-Version 8 Ohm)
Load capacity: 100 W – 1000 W / 10 ms
Dimensions H x W xD: Body 1170 x 330 x 450 mm
Total (Horn) 1550 x 460 x 580 mm
Weight: approx. 95 kg
Weight of the High-Version: approx. 110 kg
Recommended power output of the amplifier from: 25 W
The Violon (Violin) is built from a ION/plasma tweeter in its own enclosed chassis; a midrange (non-compression) horn, built using a very strong and thick acoustically neutral composite material using a Dynaudio driver; and one 10″ SEAS driver for a woofer in the sealed enclosure.The Violon Highs are the same as the Violons except that there is significantly more internal bracing and dampening, more expensive components and Acapella’s own silver wiring are used in the cross-over. Their Sub Octave is an additional 10″ SEAS driver for a total of two woofers in the sealed enclosure.The Violon box enclosure can be separated from the horn assembly and the tweeter comes in its own 30lb chassis that slides into the back of each Violon. Lately, however, the speakers are shipping with the tweeter already installed in the box enclosure.With the early Violons, the Violon 1 over 10 years ago, for example, they were hard enough to drive that we would always recommend a larger solid-state amp. A lot of work has been done over the years to improve drivability and now Acapella Violon speakers are proficiently driven tube amps like the Einstein 65 watt OTL and filled very large rooms with sound.
La Campanella 2
Efficiency: 93 dB / W / m
Impedance: 8 Ohm
Load capacity: 100 W – 1000 W / 10 ms
Dimensions H x W x D: Body 1300 x 260 x 530 mm
Total (Horn) 1410 x 390 x 610 mm
Weight: approx. 85 kg
Recommended power output of the amplifier: from 15 W
The new LaCampanella 2 and LaCampanella Alto 2 now use a new, larger (450mm, about 18″) hyperspherical horn.
Bassonobile
Efficiency: approx. 93 dB / 1 W / 1 m, amplification from 15 watts
Impedance: 8 ohms, Power handling capacity: 100 W – 1000 W / 10 ms
Dimensions (H x W x D) without horn: 1620 x 335 x 620 mm
Dimensions (H x W x D) with Horn: 1620 x 475 x 675 mm
Weight: approx 110 kg
Harlekin MK II
Efficiency: 90 dB / W / m
Impedance: 8 Ohm
Load capacity: 100 W – 300 W / 10 ms
Dimensions H x W x D: 1130 x 300 x 430 mm
Weight: approx. 55 kg
Recommended power output of the amplifier: from 20 W
High Fidelio 2 Mk III
Dimensions (W x H x D): 150 x 320 (355 with Groundplate) x 360 mm
Impedance: 8 – 10 Ohm
Efficiency: 87 dB
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