CT 322   Floorstanding as in K+T 4/2022

Technical data
  • impedance: 6 Ohm
  • sensivity (2,83V/1m): 81 dB
  • size (HxWxD): 940 x 160 x 224 mm
  • frequency range (-8dB): 45 - 25000 Hz
  • crossover frequency(s): 3000 Hz
  • speaker type:

CT 322 is a two way floorstanding speaker.

CT 322 is a TQWT (Tapered Quarter Wave Tube) loudspeaker with drivers of Omnes Audio .

The kit is delivered with the following drivers:
- a Omnes Audio AMT 50 air motion transformer (ribbon-tweeter)
- a Omnes Audio MW 4.01 woofer

The loudspeaker has been developed by Omnes Audio and Thomas Schmidt.

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 frequency response of this speaker is nearly linear.

The decay spectrum (waterfall spectrum) shows a decelerated swing-out behaviour in the mid-range.

At low volume, i.e. 85 dB at 1 m, the nonlinear distortions are below 0,9% above 300 Hz and doesn't exceed 1,3% at 95 dB at 1 m between 300 and 15000 Hz.

Our kit consists of

  • Omnes Audio MW 4.01
  • Omnes Audio AMT 50
  • 0,5x PE sealing tape, 5x2 mm, 7.5 m
  • Damping Sonofil 100 x 35 cm for 20 litres
  • 0,5x Foam N25, 97,5x49x4 cm, black
  • Terminal T105 Au, with brass, gold plated
  • 3m Speaker cable 2x1.5 mm2, transparent
  • 2x Pan screws 3.5x17 black, torx, 8 pieces
  • Plan for DIY kit

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

  • 2x Audaphon MKP CAP Superior 6.8 μF / 400 Vdc
  • 1.0 mm air core coil, 1.5 mH/0.63 Ohm
  • 0.7 mm air core coil, 0.47 mH/0.50 Ohm
  • Metal-oxide resistor, 10W 1.0 Ohm (brown-black-gold)
  • Metal-oxide resistor, 10W 5.6 Ohm (green-blue-gold)
  • Metal-oxide resistor, 10W 10 Ohm (brown-black-black)

Kit without cabinet, price per speaker   EUR 122,00 excl. VAT: € 102.52 / $ 108.67

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 Omnes Audio AMT 50 are of type polypropylen (MKP) Clarity-Cap ESA 250 V.

  • ClarityCap ESA capacitor 6.8 μF / 250 Vdc
  • Audaphon MKP CAP Superior 6.8 μF / 400 Vdc
  • Mundorf baked varnish air core coil BL71, 0.47 mH/0.57 Ohm
  • Mundorf baked varnish air core coil BL100, 1.5 mH/0.62 Ohm
  • Metal-oxide resistor, 10W 1.0 Ohm (brown-black-gold)
  • Metal-oxide resistor, 10W 5.6 Ohm (green-blue-gold)
  • Metal-oxide resistor, 10W 10 Ohm (brown-black-black)

Kit with high-end-crossover without cabinet, price per speaker   EUR 144,00 excl. VAT: € 121.01 / $ 128.27

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 15 μF / 160 Vdc
  • 0.7 mm air core coil, 1.2 mH/1.08 Ohm
  • ceramic resistor 12 Ohm/20 Watt

Price per impedance correction for one speaker, to be mounted on a small wooden board.     EUR 17,30 excl. VAT: € 14.54 / $ 15.41

universal PCB

If you prefer to mount the crossover components on a 140 x 102 mm universal PCB instead on wood:
Universal PCB RA140, order no.. str-RA140, price per unit:   EUR 4,20 excl. VAT: € 3.53 / $ 3.74
We recommend one board per kit (two boards for a speaker pair)


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