CT 248, Shelf speaker   as in K+T 3/10

   
Technical data
- impedance: 8 Ohm
- sensivity (2,83V/1m): 83 dB
- size (HxWxD): 310 x 180 x 260 mm
- frequency range (-8dB): 40 - 25000 Hz
- crossover frequency(s): 2400 Hz
- speaker type: bass reflex

CT 248 is a small shelf speaker with Seas drivers. For high frequencies the Seas 22 TAF/G tweeter with aluminium / magnesium diaphragm is used, for bass the Seas ER 15 RLY.

The crossover is a modified 12 dB/oct. containing a wave trap in the signal path to the woofer, to eliminate resonance between 7 and 8.5 kHz.

An excerpt from the Klang+Ton review

... "The sound of the CT 248 exceptionally well balanced and refined. With appropriate look and feel nobody would suspect that not even 100 Euro of driver material per channel have been employed. The bass pleases with a punchy yet distinctively clean note touch. Going on from here is a clean midrange free of colouration and misbehaviour of any kind. Not only are the lab results pleasing, the acoustical properties of the tweeter, too. The metal dome is typically balanced, almost mellow, yet still detailed and accurate. The same can be said, due to the drivers being in phase, about the excellent, realistic three-dimensionality, refraining from any gimmickry. This Cheap Trick is indeed more than just the sum of all parts. The CT 248 could easily stand the test with ready-made contenders costing many time more. Great, the same is true for all Cheap Tricks. Rarely however, did a speaker of this category sound so airy and delicate, so well balanced and unerring in attention to details."


Our kit consists of

  • Seas dome tweeter 22TAF/G
  • Seas mids woofer ER15RLY
  • Bass reflex tube Streamline 45
  • Damping Sonofil for 20 litres, white
  • Binding Post PK31 (red and black)
  • 1.5m Speaker cable 2x2.5 mm2, transparent
  • Pan screws 3.5x17 black
  • the building instruction for the kit

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

  • MKP capacitor Q4 3.9uF / 400V
  • MKP capacitor Q4 15uF / 400V
  • MKP capacitor Q4 22uF / 400V
  • 1.0 mm Air core coil, 0.47 mH/0.32 Ohm
  • 1.0 mm Air core coil, 0.82 mH/0.45 Ohm
  • core coil, 1.2 mH/0.15 0hm
  • MOX10 resistor 2.7 Ohm/10Watt (red-purple-gold)
  • 2 pcs MOX10 resistor 6.8 Ohm/10Watt (blue-grey-gold)
  • MOX10 resistor 8.2 Ohm/10Watt (grey-red-gold)

Kit without cabinet, price per speaker EUR 184,00 excl. VAT: € 154.62 / $ 177.82

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 / $ 4.93
We recommend one board per kit (two boards per speaker pair)

Kit with high-end crossover

Our high-end version comprises two low-distortion, 1.4 mm baked varnish coils in the signal path to the woofer. In the signal path to the tweeter we employ one Jantzen Z-Superior MKP capacitor.

  • MKP capacitor 15 uF / 400V
  • MKP capacitor 22 uF / 400V
  • Jantzen Z-Superior MKP capacitor 3.9 uF / 800 VDC
  • baked varnish air core coil BL100, 0.47 mH/0.32 Ohm
  • baked varnish air core coil BL140, 0.82 mH/0.26 Ohm
  • baked varnish air core coil BL140, 1.2 mH/0.34 Ohm
  • MOX10 resistor 2.7 Ohm/10Watt (red-purple-gold)
  • 2 pcs MOX10 resistor 6.8 Ohm/10Watt (blue-grey-gold)
  • MOX10 resistor 8.2 Ohm/10Watt (grey-red-gold)

Kit with high-end- crossover without cabinet, price per speaker EUR 228,00 excl. VAT: € 191.60 / $ 220.34

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 / $ 4.93
We recommend one board per kit (two boards per speaker pair)
 


Home   Klang+Ton Overview