Flat 8   Floorstanding as in K+T 4/2018

Technical data
  • impedance: 10 Ohm
  • sensivity (2,83V/1m): 90 dB
  • size (HxWxD): 940 x 400 x 210 mm
  • frequency range (-8dB): 32 - 20000 Hz
  • crossover frequency(s): Hz
  • speaker type: bass reflex

Omnes Audio Flat 8 is a floorstanding loudspeaker with a full range driver.

Flat 8 is a bass-reflex cabinet loudspeaker with drivers of Tang-Band .

The kit is delivered with a Tang-Band W8-1772 full range driver

The loudspeaker has been developed by Thorsten Fischer.

The crossover consists of:
Two LRC notch filters wired in series.

The frequency response of this speaker is nearly linear, taking into account that it is a full range speaker.

The decay spectrum is nearly perfect.

At low volume, i.e. 85 dB at 1 m, the nonlinear distortions are below 0,8% above 200 Hz and doesn't exceed 0,8% at 95 dB at 1 m between 300 and 15000 Hz.

  • Tang Band W8-1772 full range
  • Damping fleece MT Bondum 800 (30 x 50 x 2 cm)
  • 0,5x PE sealing tape, 5x2 mm, 7.5 m
  • 2x 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
  • Allen wood screws, black, 5x30 mm, 8 pieces
  • Plan for DIY kit

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

  • 2 pcs Audaphon MKP CAP Superior / 400 Vdc
  • 2 pcs air core coil, 2.7 mH/0.93 Ohm
  • 2 pcs Metal-oxide resistor, 10W

Kit without cabinet, price per speaker   EUR 303,00 excl. VAT: € 254.62 / $ 287.72

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 fullrange driver are of type polypropylen (MKP) Clarity-Cap ESA 250 V.

Kit with high-end-crossover without cabinet, price per speaker   EUR 325,00 excl. VAT: € 273.11 / $ 308.61

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).


Price per impedance correction for one speaker, to be mounted on a small wooden board.     EUR 7,00 excl. VAT: € 5.88 / $ 6.65

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 / $ 4.46
We recommend one board per kit (2 boards per speaker pair)


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