Tröööt   Floorstanding as in K+T 3/2020

Technical data
  • impedance: 8 Ohm
  • sensivity (2,83V/1m): 90 dB
  • size (HxWxD): 760 x 520 x 400 mm
  • frequency range (-8dB): 38 - 20000 Hz
  • crossover frequency(s): 1100 Hz
  • speaker type: bass reflex

Tröööt is a two way floorstanding speaker.

Tröööt is a bass-reflex cabinet loudspeaker with drivers of Celestion and Visaton.

The kit is delivered with the following drivers:
- a Celestion CDX1-1747 horn with driver
- a Visaton W 300 8 Ohm woofer

The loudspeaker has been developed by Oliver Martin.

The crossover consists of:
- a 2nd order high-pass filter (12 dB per octave slope) for the tweeter.
- a 3rd order low-pass filter (18 dB per octave slope) for the woofer.

The frequency response of this speaker is perfectly 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 0,6% above 300 Hz and doesn't exceed 1,1% at 95 dB at 1 m between 300 and 15000 Hz.

Our kit consists of

  • Visaton W300, 8 Ohm
  • Celestion CDX1-1747, 1.75 inch-Kapton-Driver
  • 0,5x PE sealing tape, 5x2 mm, 7.5 m
  • 2x Damping Sonofil 100 x 35 cm for 20 litres
  • Foam N25-30, 100 x 50 cm, black
  • Bi-wiring Terminal T122 Au with brass, gold plated
  • 3m Speaker cable 2x2.5 mm2, transparent
  • Pan screws 4x20 black, torx, 8 pieces
  • Plan for DIY kit

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

  • Audaphon MKP CAP Superior 1.0 μF; / 400 Vdc
  • Audaphon MKP CAP Superior 5.6 μF; / 400 Vdc
  • Audaphon MKT CAP 4.7 μF; / 160 Vdc
  • Audaphon MKT CAP 6.8 μF; / 160 Vdc
  • Audaphon MKT CAP 22 μF; / 160 Vdc
  • Audaphon MKT CAP 33 μF; / 160 Vdc
  • 1.0 mm air core coil, 0.82 mH/0.44 Ohm
  • 1.0 mm air core coil, 2.2 mH/0.89 Ohm
  • 0.7 mm air core coil, 3.3 mH/1.75 Ohm
  • ceramic resistor 8.2 Ohm/20 Watt
  • Metal-oxide resistor, 10W 2.7 Ohm (red-purple-gold)
  • 2x Metal-oxide resistor, 10W 22 Ohm (red-red-black)

Kit without cabinet, price per speaker   EUR 268,00 excl. VAT: € 225.21 / $ 245.48

Kit with high-end crossover

The high-end kit is delivered with baked varnish air core coils 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 capacitor for the Celestion CDX1-1747 is of type polypropylen (MKP) Clarity-Cap CSA 250 V.

  • ClarityCap CSA capacitor 5.6 μF; / 250 Vdc
  • ClarityCap ESA capacitor 1 μF; / 250 Vdc
  • Audaphon MKP CAP Superior 4.7 μF; / 400 Vdc
  • Audaphon MKP CAP Superior 22 μF; / 400 Vdc
  • Audaphon MKT CAP 6.8 μF; / 160 Vdc
  • Audaphon MKT CAP 33 μF; / 160 Vdc
  • Mundorf baked varnish air core coil BL71, 3.3 mH/1.75 Ohm
  • Mundorf baked varnish air core coil BL100, 0.82 mH/0.45 Ohm
  • Mundorf baked varnish air core coil BL100, 2.2 mH/0.83 Ohm
  • ceramic resistor 8.2 Ohm/20 Watt
  • Metal-oxide resistor, 10W 2.7 Ohm (red-purple-gold)
  • 2x Metal-oxide resistor, 10W 22 Ohm (red-red-black)

Kit with high-end-crossover without cabinet, price per speaker   EUR 310,00 excl. VAT: € 260.50 / $ 283.95

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 22 μF; / 160 Vdc
  • 0.7 mm air core coil, 0.056 mH
  • ceramic resistor 10 Ohm/20 Watt

Price per impedance correction for one speaker, to be mounted on a small wooden board.     EUR 12,10 excl. VAT: € 10.17 / $ 11.08

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 / $ 4.31
We recommend one board per kit (2 boards per speaker pair)


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