Ara Textreme Beryllium   Shelf speaker as in K+T 6/2025

Technical data
  • impedance: 4 Ohm
  • sensivity (2,83V/1m): 87 dB
  • size (HxWxD): 391 x 190 x 388 mm
  • frequency range (-8dB): 40 - 40000 Hz
  • crossover frequency(s): 1600 Hz
  • speaker type: bass reflex
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Ara Textreme Beryllium is a two way compact speaker.

Ara Textreme Beryllium is a bass-reflex cabinet loudspeaker with drivers of SB Acoustics .

The kit is delivered with the following drivers:
- a SB Acoustics SATORI-TW29B-B tweeter
- a SB Acoustics Satori MW16TX-4 woofer

The loudspeaker has been developed by Daniel Gattig, Dennis Frank and SB Acoustics.

The crossover consists of:
- a 4th order high-pass filter (24 dB per octave slope) for the tweeter.
- a 4th order low-pass filter (24 dB per octave slope) for the woofer.

The frequency response of this speaker is perfectly linear.

The decay spectrum is nearly perfect.

At low volume, i.e. 85 dB at 1 m, the nonlinear distortions are below 0,2% above 300 Hz and doesn't exceed 0,5% at 95 dB at 1 m between 300 and 15000 Hz.

An excerpt from the Klang+Ton review (Translation of the author into English)

Conclusion of the magazine Klang+Ton:

Our kit consists of

  • SB Acoustics beryllium dome tweeter SATORI-TW29B-B, black faceplate
  • SB Acoustics Satori MW16TX-4
  • 2x Bass reflex tube HP50, 50x143mm, black
  • Damping fleece MT Bondum 800 (30 x 50 x 2 cm)
  • 0,5x Damping Sonofil 100 x 35 cm for 20 litres
  • Binding Post PK28 I, gold plated (one pair, red and black)
  • 2m Speaker cable 2x1.5 mm2, transparent
  • 1,5x Allen wood screws, black, 4x25 mm, 8 pieces
  • Plan for DIY kit

the crossover components (right),
to be mounted on a small wooden board.

  • Jantzen Cross Cap MKP capacitor 2.2 μF / 400V
  • Jantzen Cross Cap MKP capacitor 10 μF / 400V
  • Jantzen Cross Cap MKP capacitor 12 μF / 400V
  • Audaphon MKT CAP 5.6 μF / 160 Vdc
  • Audaphon MKT CAP 33 μF / 160 Vdc
  • Audaphon MKT CAP 47 μF / 160 Vdc
  • Mundorf air core coil L140, 0.56 mH/0.20 Ohm
  • 1.4 mm air core coil 1.5 mH/0.36 Ohm
  • 0.7 mm air core coil, 0.27 mH/0.44 Ohm
  • 0.7 mm air core coil, 0.82 mH/0.89 Ohm
  • Mundorf ferrite core coil P50 12 mH/4.31Ohm
  • Metal-oxide resistor, 10W 3.3 Ohm (orange-orange-gold)
  • Metal-oxide resistor, 10W 8.2 Ohm (grey-red-gold)
  • Metal-oxide resistor, 10W 10 Ohm (brown-black-black)

Kit without cabinet, price per speaker   EUR 839,00 excl. VAT: € 705.04 / $ 817.85

Kit with high-end crossover

The high-end kit is delivered with baked varnish air core coils on important parts of the crossover for minimizing microphonic effects. - The current flow through the coil creates a magnetic field which sets the reel of wire in motion. This motion induces a voltage in the coil which adds itself to the signal. The stiffer the reel of wire is, the less the signal will be altered. The capacitors for the SB Acoustics SATORI-TW29B-B are of type polypropylen (MKP) Mundorf MKP 250 V.

  • Mundorf MKP capacitor 2.2 μF / 250 V
  • Mundorf MKP capacitor 10 μF / 250 V
  • Mundorf MKP capacitor 12 μF / 250 V
  • Audaphon MKT CAP 5.6 μF / 160 Vdc
  • Audaphon MKT CAP 33 μF / 160 Vdc
  • Audaphon MKT CAP 47 μF / 160 Vdc
  • Mundorf baked varnish air core coil BL71, 0.27 mH/0.45 Ohm
  • Mundorf baked varnish air core coil BL71, 0.82 mH/0.89 Ohm
  • Mundorf baked varnish air core coil BL140, 0.56 mH/0.20 Ohm
  • Mundorf baked varnish air core coil BL140, 1.5 mH/0.38 Ohm
  • Mundorf ferrite core coil P50 12 mH/4.31Ohm
  • Mresist Classic 3,3 Ohm / 10 Watt
  • Mresist Classic 8,2 Ohm / 10 Watt
  • Mresist Classic 10 Ohm / 10 Watt

Kit with high-end-crossover without cabinet, price per speaker   EUR 886,00 excl. VAT: € 744.54 / $ 863.66

Our kit for useing with SB Acoustics cabinets consists of

  • 2x SB Acoustics beryllium dome tweeter SATORI-TW29B-B, black faceplate
  • 2x SB Acoustics Satori MW16TX-4
  • 2x Damping fleece MT Bondum 800 (30 x 50 x 2 cm)
  • 4m Speaker cable 2x1.5 mm2, transparent
  • 2x Plan for DIY kit

the crossover components (right),
to be mounted on a small wooden board.

  • 2x Jantzen Cross Cap MKP capacitor 2.2 μF / 400V
  • 2x Jantzen Cross Cap MKP capacitor 10 μF / 400V
  • 2x Jantzen Cross Cap MKP capacitor 12 μF / 400V
  • 2x Audaphon MKT CAP 5.6 μF / 160 Vdc
  • 2x Audaphon MKT CAP 33 μF / 160 Vdc
  • 2x Audaphon MKT CAP 47 μF / 160 Vdc
  • 2x Mundorf air core coil L140, 0.56 mH/0.20 Ohm
  • 2x 1.4 mm air core coil 1.5 mH/0.36 Ohm
  • 2x 0.7 mm air core coil, 0.27 mH/0.44 Ohm
  • 2x 0.7 mm air core coil, 0.82 mH/0.89 Ohm
  • 2x Mundorf ferrite core coil P50 12 mH/4.31Ohm
  • 2x Metal-oxide resistor, 10W 3.3 Ohm (orange-orange-gold)
  • 2x Metal-oxide resistor, 10W 8.2 Ohm (grey-red-gold)
  • 2x Metal-oxide resistor, 10W 10 Ohm (brown-black-black)

Kit without cabinet, price per pair   EUR 1643,00 excl. VAT: € 1380.67 / $ 1601.58

Kit with high-end crossover

The high-end kit is delivered with baked varnish air core coils on important parts of the crossover for minimizing microphonic effects. - The current flow through the coil creates a magnetic field which sets the reel of wire in motion. This motion induces a voltage in the coil which adds itself to the signal. The stiffer the reel of wire is, the less the signal will be altered. The capacitors for the SB Acoustics SATORI-TW29B-B are of type polypropylen (MKP) Mundorf MKP 250 V.

Kit with high-end-crossover without cabinet, price per pair   EUR 1728,00 excl. VAT: € 1452.10 / $ 1684.44

Cabinets inclusive damping, screws, bass reflex tube and grilles

Ara Kit cabinet white satin, price per pair   EUR 549,00 excl. VAT: € 461.34 / $ 535.16

Ara Kit cabinet white high gloss, price per pair   EUR 639,00 excl. VAT: € 536.97 / $ 622.89

Ara Kit cabinet black high gloss, price per pair   EUR 639,00 excl. VAT: € 536.97 / $ 622.89

Ara Kit cabinet orange lambo high gloss, price per pair   EUR 719,00 excl. VAT: € 604.20 / $ 700.87

Impedance correction

If you want to use a valve amplifier with this speaker an impedance correction should be employed. In this case the component quality is less important; therefore, we offer only one kit (upon request higher quality components are available).

  • Audaphon MKT CAP 47 μF / 160 Vdc
  • 0.7 mm air core coil, 0.39 mH/0.49 Ohm
  • ceramic resistor 4.7 Ohm/20 Watt

Price per impedance correction for one speaker, to be mounted on a small wooden board.     EUR 21,52 excl. VAT: € 18.08 / $ 20.98

universal PCB

If you prefer to mount the crossover components on a universal PCB instead on wood
PCB 150x115 mm, tin plated, price per unit:   EUR 4,70 excl. VAT: € 3.95 / $ 4.58
We recommend one board per kit (2 boards per speaker pair)


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