Cube 8BB4   Shelf speaker as in K+T 1/2016

Technical data
  • impedance: 6 Ohm
  • sensivity (2,83V/1m): 88 dB
  • size (HxWxD): 350 x 350 x 350 mm
  • frequency range (-8dB): 35 - 22000 Hz
  • crossover frequency(s): Hz
  • speaker type: bass reflex

Cube 8BB4 stands for 8 inch woofer and 4 inch fullrange driver (the German word for fullrange is BreitBand, therefor BB). Both are in a cubic cabinet: a 2 way bassreflex loudspeaker with Omnes Audio fullrange BB 4.01 and woofer Omnes Audio Exclusive 8. Cube 8BB4 has been developed by Blue Planet Acoustic.

The crossover consists of a 3rd order high-pass filter (18 dB per octave slope) for the fullrange speaker and a 2nd order low-pass filter for the woofer. A RLC resonant circuit in series to the fullrange loudspeaker eliminates unwanted resonances.

The frequency response of this speaker is linear (except for higher frequencies, like it is typical for fullrange loudspeakers). The decay spectrum is nearly perfect. At low volume, i.e. 85 dB at 1 m, the nonlinear distortions are lower than 0.2% between 500 and 10 000 Hz and rises not over 0.5% at 95 dB at 1 m .

Our kit consists of

  • Omnes Audio Exclusive 8
  • Omnes Audio, full range BB 4.01
  • Bass reflex tube HP50, 50x145 mm, black
  • 0,5x PE sealing tape, 5x2 mm, 7.5 m
  • Damping Sonofil 100 x 35 cm for 20 litres
  • Binding Post PK31, gold plated (one pair, red and black)
  • 2m Speaker cable 2x1.5 mm2, transparent
  • 1,5x Pan screws 4x20 black, cross recess, 8 pieces
  • Plan for DIY kit

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

  • 4x Audaphon MKT / 160 Vdc
  • 2x 1.0 mm air core coil
  • Mundorf H core coil H140
  • Metal-oxide resistor, 10W

Kit without cabinet, price per speaker   EUR 360,00 excl. VAT: € 302.52 / $ 341.85

Kit with low-cost crossover

Kit with high-end-crossover without cabinet, price per speaker   EUR 309,00 excl. VAT: € 259.66 / $ 293.42

Kit with high-end crossover

Kit with high-end-crossover without cabinet, price per speaker   EUR 377,00 excl. VAT: € 316.81 / $ 357.99

universal PCB

If you prefer to mount the crossover components on a 240 x 165 mm universal PCB instead on wood:
Universal PCB RA240, order no.. I-2767, price per unit:   EUR 7,60 excl. VAT: € 6.39 / $ 7.22
We recommend one plate for one kit (for a pair of speakers you need 2 plates)


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