Orwell MK2   Floorstanding as in K+T 2/2017

Technical data
  • impedance: 4 Ohm
  • sensivity (2,83V/1m): 98 dB
  • size (HxWxD): 1250 x 500 x 500 mm
  • frequency range (-8dB): 50 - 21000 Hz
  • crossover frequency(s): 1000 Hz
  • speaker type: bass reflex

Orwell MK2 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 FTR15-4080F are used for the bass range.

Orwell MK2 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 nearly linear. The decay spectrum shows some little horn typical artefacts. At medium volume, i.e. 95 dB at 1 m, the nonlinear distortions are lower than 1% between 150 and 5000 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 FTR15-4080F, 97dB, 40Hz-1.5kHz
  • PE sealing tape, 5x2 mm, 7.5 m
  • 2,5x Foam N25, 100x50x4 cm, black
  • 2x Neutrik Speakon NL4MPR, connector round, 4 pin
  • 4m Speaker cable 2x2.5 mm2, transparent
  • 26x 1 pieces drive-in nuts M6, DIN 6930 g zinc-plated
  • 16x 1 pieces Allen screws M6x50, DIN 912, black
  • 10x Counter sunk screw black phosphatised M 6 x 30
  • 4x Adam Hall 4907 rubber foot
  • 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.

  • ClarityCap PWA capacitor 5.6 μF / 400 Vdc
  • 2x ClarityCap PWA capacitor 10 μF / 400 Vdc
  • ClarityCap PWA capacitor 33 μF / 400 Vdc
  • Mundorf air core coil L140, 1.2 mH/0.33 Ohm
  • Mundorf bt140 transformer core coil 2.2mH/0.12Ohm
  • Mundorf t200 transformer core coil 10mH/0.22Ohm
  • 3x ceramic resistor 3.9 Ohm/20 Watt

Kit without cabinet, price per speaker   EUR 1335,00 excl. VAT: € 1121.85 / $ 1200.38

Kit with high-end crossover

The high-end kit is delivered with air coils except for the woofer. The capacitors are Clarity Caps of type PWA and for the tweeter Clarity Caps of type ESA 630V.

Kit with high-end-crossover without cabinet, price per speaker   EUR 1461,00 excl. VAT: € 1227.73 / $ 1313.67

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 28,00 excl. VAT: € 23.53 / $ 25.18

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 11,80 excl. VAT: € 9.92 / $ 10.61
We recommend one board per kit (two boards for a speaker pair)


Assembled plywood cabinet (without paint) for Kit Orwell MK2,
price per unit   on request

Measurements Orwell MK2


technical drawing Orwell MK2


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