K+T-Projekt GT6, Shelf speaker   as in K+T 1/2014

Technical data
- impedance: 6 Ohm
- sensivity (2,83V/1m): 84 dB
- size (HxWxD): 330 x 200 x 292 mm
- frequency range (-8dB): 29 - 30000 Hz
- crossover frequency(s): 1400 Hz
- speaker type: bass reflex

A successor to the GT speaker should be found because the tweeter is no longer available. Then it was decided however to engage a larger woofer; instead of 5 inches a 6-incher. The name was then simply found: GT6. This development by Holger Barske and Thomas Schmidt uses Monacor chassis, namely tweeter DT 350NF with metal diaphragm and a Monacor woofer SPH-6 M with polypropylene cone. They are used in a bass-reflex enclosure with bass reflex tube on the rear panel of the cabinet.

A second-order crossover is used (slope 12 dB/octave). In addition there is an impedance correction circuit in parallel to the woofer.
 

    

Our kit consists of

  • Monacor tweeter DT-350NF
  • Monacor woofer SPH-6M
  • 2x Bass reflex tube HP50, 50x145 mm, black
  • PE sealing tape, 5x2 mm
  • Damping Sonofil 100 x 35 cm for 20 litres
  • 0,25x Foam N25, 100x50x4 cm, black
  • Binding Post PK31, gold plated (one pair, red and black)
  • 2m Speaker cable 2x2.5 mm2, transparent
  • Pan screws 4x20 black, 12 pieces
  • Plan for DIY kit

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

  • Audaphon MKP CAP Superior 5.6 uF / 400 Vdc
  • Audaphon MKT CAP 4.7 uF / 160 Vdc
  • Mundorf, electrolytic capacitor, unetched, 22uF / 70 Vdc
  • 0.7 mm air core coil, 0.47 mH/0.50 Ohm
  • 1.4 mm air core coil, 2.2 mH/0.46 Ohm
  • 2x Metal-oxide resistor, 10W 6.8 Ohm (blue-grey-gold)
  • Metal-oxide resistor, 10W 8.2 Ohm (grey-red-gold)

Kit without cabinet, price per speaker - not available

Kit with high-end crossover

Our Kit with high end crossover includes a high-quality ClarityCap capacitor type ESA in series with the tweeter. The electrolytic capacitor was replaced by a foil capacitor of type MKT. All used coils are baked varnish air coils.

  • ClarityCap ESA capacitor 5.6 uF / 250 Vdc
  • Audaphon MKT CAP 4.7 uF / 160 Vdc
  • Audaphon MKT CAP 22 uF / 160 Vdc
  • Mundorf baked varnish air core coil BL71, 0.47 mH/0.57 Ohm
  • Mundorf baked varnish air core coil BL140, 2.2 mH/0.46 Ohm
  • 2x Metal-oxide resistor, 10W 6.8 Ohm (blue-grey-gold)
  • Metal-oxide resistor, 10W 8.2 Ohm (grey-red-gold)

Kit with high-end-crossover without cabinet, price per speaker - not available

Kit with high-end crossover No. 2

Still a better solution provides crossover no. 2. It uses in series with the tweeter a Rike audio oil capacitor manufactured in Germany and in series to the woofer a Mundorf copper foil coil:

  • Rike S-Cap 5.6 uF / 630 Vdc
  • Audaphon MKT CAP 4.7 uF / 160 Vdc
  • Audaphon MKT CAP 22 uF / 160 Vdc
  • Mundorf copper foil coil CFC16-2.2mH/0.54Ohm
  • Mundorf baked varnish air core coil BL71, 0.47 mH/0.57 Ohm
  • 2x Metal-oxide resistor, 10W 6.8 Ohm (blue-grey-gold)
  • Metal-oxide resistor, 10W 8.2 Ohm (grey-red-gold)

Kit with high-end-crossover no. 2without cabinet, price per speaker - not available

universal PCBs

If you prefer to mount the crossover components on a 159 x 127 mm universal PCB instead on wood:
Universal PCB RA160, order no.. I-2766, price per unit: EUR 5,10 excl. VAT: € 4.29 / $ 5.27
We recommend one boards per kit (two boards for a speaker pair)
 


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