SB Acoustics ARA-Kit   Shelf speaker as in Hobby Hifi 6/2019

Technical data
  • impedance: 4 Ohm
  • sensivity (2,83V/1m): 86 dB
  • size (HxWxD): 391 x 190 x 388 mm
  • frequency range (-8dB): 38 - 31000 Hz
  • crossover frequency(s): 2000 Hz
  • speaker type: bass reflex

SB Acoustics ARA Kit is a two way compact speaker.

SB Acoustics ARA Kit is a bass-reflex cabinet loudspeaker with drivers of SB Acoustics .

The kit is delivered with the following drivers:
- a SB Acoustics Satori TW29R-B tweeter
- a SB Acoustics Satori MW16P-4 woofer

The loudspeaker has been developed by SB Acoustics and Bernd Timmermanns.

The crossover consists of:
- a 2nd order high-pass filter (12 dB per octave slope) for the tweeter.
- a 2nd order low-pass filter (12 dB per octave slope) for the woofer.

The crossover frequency of the SB Acoustics crossover is 4000 Hz.

The frequency response of this speaker is nearly linear.

The decay spectrum as shown in the waterfall diagram is exemplary, free of any disturbing resonance.

At medium volume, i.e. 90 dB at 1 m, the nonlinear distortions are below 0,6% above 300 Hz.

Our kit with HOBBY HiFi crossover consists of

  • SB Acoustics ring dome tweeter SATORI-TW29R-B
  • SB Acoustics SATORI-MW16p, 4 Ohm
  • 2x Bass reflex tube HP50, 50x145 mm, black
  • 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 Pan screws 4x20 black, torx, 8 pieces
  • Plan for DIY kit

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

  • Mundorf MCAP EVO 15 uF / 450 V
  • Mundorf MCAP EVO Oil 6.8 uF / 450 V
  • Audaphon MKP CAP Superior 1.0 uF / 400 Vdc
  • electrolytic capacitor, unetched, 33uF / 70 Vdc
  • Mundorf baked varnish air core coil BL71, 0.47 mH/0.57 Ohm
  • Mundorf baked varnish air core coil BL71, 1.5 mH/1.13 Ohm
  • Mundorf baked varnish air core coil BL140, 1.2 mH/0.34 Ohm
  • Metal-oxide resistor, 10W 3.9 Ohm (orange-white-gold)
  • Metal-oxide resistor, 10W 6.8 Ohm (blue-grey-gold)

Kit without cabinet, price per speaker   EUR 395,00 excl. VAT: € 331.93 / $ 368.45

Kit with HOBBY HiFi high-end crossover

The high-end kit is delivered with baked varnish air core coils and CFC 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 TW29R-B are of type polypropylen (MKP) Mundorf Mcap Supreme EVO ÖL.

Kit with high-end-crossover without cabinet, price per speaker   EUR 476,00 excl. VAT: € 400.00 / $ 444.00

Our kit with SB Acoustics crossover consists of

  • SB Acoustics ARA Crossover for tweeter TW29R-B, a pair
  • 2x SB Acoustics ring dome tweeter SATORI-TW29R-B
  • 2x SB Acoustics SATORI-MW16p, 4 Ohm
  • 4x Bass reflex tube HP50, 50x145 mm, black
  • 2x Damping Sonofil 100 x 35 cm for 20 litres
  • 2x Binding Post PK28 I, gold plated (one pair, red and black)
  • 4m Speaker cable 2x1.5 mm2, transparent
  • 3x Pan screws 4x20 black, torx, 8 pieces
  • Plan for DIY kit

Kit without cabinet, price per pair   EUR 829,00 excl. VAT: € 696.64 / $ 773.27

Our kit with HOBBY HiFi crossover for useing with SB Acoustics cabinets consists of

  • 2x SB Acoustics ring dome tweeter SATORI-TW29R-B
  • 2x SB Acoustics SATORI-MW16p, 4 Ohm
  • 4m Speaker cable 2x1.5 mm2, transparent
  • Plan for DIY kit

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

  • 2x Mundorf MCAP EVO 15 uF / 450 V
  • 2x Mundorf MCAP EVO Oil 6.8 uF / 450 V
  • 2x Audaphon MKP CAP Superior 1.0 uF / 400 Vdc
  • 2x electrolytic capacitor, unetched, 33uF / 70 Vdc
  • 2x Mundorf baked varnish air core coil BL71, 0.47 mH/0.57 Ohm
  • 2x Mundorf baked varnish air core coil BL71, 1.5 mH/1.13 Ohm
  • 2x Mundorf baked varnish air core coil BL140, 1.2 mH/0.34 Ohm
  • 2x Metal-oxide resistor, 10W 3.9 Ohm (orange-white-gold)
  • 2x Metal-oxide resistor, 10W 6.8 Ohm (blue-grey-gold)

Kit without cabinet, price per pair   EUR 758,00 excl. VAT: € 636.97 / $ 707.04

Kit with HOBBY HiFi high-end crossover

The high-end kit is delivered with baked varnish air core coils and CFC 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 TW29R-B are of type polypropylen (MKP) Mundorf Mcap Supreme EVO ÖL.

Kit with high-end-crossover without cabinet, price per pair   EUR 919,00 excl. VAT: € 772.27 / $ 857.22

Our kit to be used with SB Acoustics cabinets and with SB Acoustics crossover consists of

  • SB Acoustics ARA Crossover for tweeter TW29R-B, a pair
  • 2x SB Acoustics ring dome tweeter SATORI-TW29R-B
  • 2x SB Acoustics SATORI-MW16p, 4 Ohm
  • 4m Speaker cable 2x1.5 mm2, transparent
  • Plan for DIY kit

Cabinets inclusive damping, screws, bass reflex tube and grilles

Ara Kit cabinet white satin, price per pair   EUR 339,00 excl. VAT: € 284.87 / $ 316.21

Ara Kit cabinet white high gloss, price per pair   EUR 399,00 excl. VAT: € 335.29 / $ 372.18

Ara Kit cabinet black high gloss, price per pair   EUR 399,00 excl. VAT: € 335.29 / $ 372.18

Ara Kit cabinet orange lambo high gloss, price per pair   EUR 479,00 excl. VAT: € 402.52 / $ 446.80

Impedance correction for the HOBBY HiFi crossover

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).


Price per impedance correction for one speaker, to be mounted on a small wooden board.     EUR 14,55 excl. VAT: € 12.23 / $ 13.57

universal PCB for the HOBBY HiFi crossover

If you prefer to mount the crossover components on a 159 x 127 mm universal PCB instead on wood:
Universal PCB RA160, order no.. I-2766, price per unit:   EUR 5,10 excl. VAT: € 4.29 / $ 4.76
We recommend one board per kit (two boards for a speaker pair)


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