Ephedra 2016   Floorstanding as in K+T 4/2016

Technical data
  • impedance: 8 Ohm
  • sensivity (2,83V/1m): 94 dB
  • size (HxWxD): 1056 x 356 x 402 mm
  • frequency range (-8dB): 43 - 20000 Hz
  • crossover frequency(s): 800 Hz
  • speaker type: bass reflex

Holger Barske and Thomas Schmidt of journal Klang+Ton present in time for the coming gardening season, the new model of its HiFi-PA loudspeaker. Ephedra 2016 is a 2 way floorstanding speaker with professional drivers from Monacor and Celestion. The kit is delivered with the woofer Monacor SP-12/200PA and the Celestion CDX1-1747 mounted on a horn Monacor MRH-200.

The crossover consists of a second order high-pass filter (12 dB per octave slope) for the tweeter with an Silvercore Autoformer to reduce the volume to that of the woofer. Te woofer is connected a second order low-pass filter (12 dB per octave slope) .

The frequency response is flat on 15 degree angle (horizontal deviation). The decay spectrum shows nearly no resonances. At medium volume, i.e. 95 dB at 1 m, the nonlinear distortions are lower than 1% above 200 Hz and doesn't exceed 2% below 5 kHz at 105 dB at 1 m .

Our kit consists of

  • Celestion CDX1-1747, 1.75 inch-Kapton-Driver
  • Monacor SP12/200PA, mids/woofer, 100 dB
  • Monacor MRH-200, 320 x 198 mm horn
  • Bass reflex tube for Ephedra
  • PE sealing tape, 5x2 mm, 7.5 m
  • Damping Sonofil 100 x 35 cm for 20 litres
  • 1,5x Foam N25-30, 100 x 50 cm, black
  • Binding Post PK31, gold plated (one pair, red and black)
  • 3m Speaker cable 2x2.5 mm2, transparent
  • 2x Allen wood screws, black, 5x30 mm, 8 pieces
  • Plan for DIY kit

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

  • Audaphon MKP CAP Superior 1.5 μF / 400 Vdc
  • Audaphon MKP CAP Superior 2.7 μF / 400 Vdc
  • Audaphon MKT CAP 33 μF / 160 Vdc
  • Audaphon MKT CAP 47 μF / 160 Vdc
  • Autoformer 8Ohm, 30W/500Hz -8 till -14dB
  • Mundorf air core coil L140, 3.3 mH/0.58 Ohm
  • 0.7 mm air core coil, 0.47 mH/0.50 Ohm
  • 0.7 mm air core coil, 0.56 mH/0.55 Ohm
  • Metal-oxide resistor, 10W 8.2 Ohm (grey-red-gold)
  • Metal-oxide resistor, 10W 12 Ohm (brown-red-black)

Kit without cabinet, price per speaker   - not available

Kit with high-end crossover

The high-end kit comes with Clarity Cap capacitors of high quality. The capacitors for the tweeter are Clarity Cap ESA 630V. The inductances are 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.

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

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 14,00 excl. VAT: € 11.76 / $ 12.59

universal PCBs

If you prefer to mount the crossover components on a 240 x 165 mm universal PCB instead on wood:
Universal PCB RA240, order no.. str-RA240, price per unit:   EUR 8,60 excl. VAT: € 7.23 / $ 7.73
We recommend one plate for one kit (for a pair of speakers you need 2 plates)

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