Orwell   DJ and power speaker system as in K+T 4/2016

Technical data
  • impedance: 4 Ohm
  • sensivity (2,83V/1m): 99 dB
  • size (HxWxD): 1250 x 550 x 550 mm
  • frequency range (-8dB): 40 - 20000 Hz
  • crossover frequency(s): 220, 1050 Hz
  • speaker type: bass reflex
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Orwell is a high quality two-and-a-half-way PA speaker with HiFi sound quality. The kit provides a Celestion CDX20-3020 driver with a P-Audio PH-2380 horn as tweeter. Two Celestion FTR15-3070C are used for the bass range.

Orwell is developed by Daniel Gattig and Dennis Frank.

The crossover consists of a 3rd order high-pass filter (18 dB per octave slope) for the tweeter. A 2nd order low pass filter (12 dB per octave slope) is connected to the lower woofer and has a cut-off frequency of 300 Hz. The upper woofer is connected to a 2nd. order low pass filter with a cut off frequency of 1000 Hz. In the bassrange below 300 Hz both woofers are working in parallel.

The frequency response of this speaker a linear. The decay spectrum shows some little horn typical artefacts. At low volume the nonlinear distortion is very low (not measurable according to journal Klang+Ton) at medium volume, i.e. 95 dB at 1 m, the nonlinear distortion is lower than 0,5% between 500 and 4000 Hz; at a level of 105 dB at 1 m the distortion is below 1.5%.

Our kit consists of

  • Celestion CDX20-3020, 3 inch-Titanium-Driver, 8 Ohm
  • P-Audio 2 inch horn PH-2380
  • 2x Celestion woofer FTR15-3070C, 100dB, 50Hz-2.5kHz
  • 4x Bass reflex tube HP100, 100x200 mm, black
  • 3x Foam N25, 100x50x4 cm, black
  • 2x Neutrik Speakon NL4MPR, connector round, 4 pin
  • 4m Speaker cable 2x2.5 mm2, transparent
  • Speaker cabinet feet VPE 4 units (st-BN202554)
  • 24x 1 pieces drive-in nuts M6, DIN 6930 g zinc-plated
  • 24x 1 pieces Allen screws M6x35, DIN 912, black
  • 2x Handle recess GSM-220, steel 22x16 cm, black
  • Plan for DIY kit

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

  • Audaphon MKP CAP Superior 4.7 uF / 400 Vdc
  • Audaphon MKP CAP Superior 8.2 uF / 400 Vdc
  • Audaphon MKT CAP 33 uF / 160 Vdc
  • Audaphon MKT CAP 47 uF / 160 Vdc
  • 1.0 mm air core coil, 1.5 mH/0.62 Ohm
  • Mundorf bs140 core coil 8.2mH/0.33Ohm
  • Mundorf H core coil H140, 2.2 mH/0.14 0hm
  • ceramic resistor 15 Ohm/20 Watt

Kit without cabinet, price per speaker   EUR 898,00 excl. VAT: € 754.62 / $ 656.19

Kit with high-end crossover

The high-end kit is delivered with copper foil coils and 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. All capacitors are foil capacitors of type polypropylen (MKP).

Kit with high-end-crossover without cabinet, price per speaker   EUR 1079,00 excl. VAT: € 906.72 / $ 788.45

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 14,40 excl. VAT: € 12.10 / $ 10.52

universal PCBs

If you prefer to mount the crossover components on a universal PCB instead on wood
PCB 220x155 mm, order no. I-8805002, price per unit:   EUR 11,70 excl. VAT: € 9.83 / $ 8.55
We recommend one board per kit (two boards for a speaker pair)


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