Narmada   Shelf speaker as in K+T 1/2019

Technical data
  • impedance: 6 Ohm
  • sensivity (2,83V/1m): 91 dB
  • size (HxWxD): 450 x 300 x 400 mm
  • frequency range (-8dB): 42 - 25000 Hz
  • crossover frequency(s): 2100 Hz
  • speaker type: bass reflex
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Narmada is a two way compact speaker. It is characterized by high efficiency and low non-linear distortion. Il se caractérise par un rendement élevé et une faible distorsion non linéaire.

Narmada is a bass-reflex cabinet loudspeaker with drivers of Audaphon and Wavecor.

The kit is delivered with the following drivers:
- a Audaphon AMT 1i, runde Frontplatte tweeter
- a Wavecor WF259PA01 woofer

The loudspeaker has been developed by Dennis Frank and Daniel Gattig.

The crossover consists of:
- a 3rd order high-pass filter (18 dB per octave slope) for the tweeter.
- a 3rd order low-pass filter (18 dB per octave slope) for the woofer.

The frequency response of this speaker is perfectly linear.

The decay spectrum is perfect.

At low volume, i.e. 85 dB at 1 m, the nonlinear distortions are below 0,4% above 200 Hz and doesn't exceed 0,6% at 95 dB at 1 m between 300 and 15000 Hz.

Our kit consists of

  • Audaphon AMT-1i round Faceplate
  • Wavecor WF259PA01, 8 Ohm, professional woofer
  • Bass reflex tube HP100, 100x200 mm, black
  • 2,5x Damping fleece MT Bondum 800 (30 x 50 x 2 cm)
  • 0,5x Damping Sonofil 100 x 35 cm for 20 litres
  • Binding Post PK28 I, gold plated (one pair, red and black)
  • 2m Speaker cable 2x1.5 mm2 black/red
  • Allen wood screws, black, 4x25 mm, 8 pieces
  • Plan for DIY kit

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

  • ClarityCap PWA capacitor 15 uF / 160 Vdc
  • ClarityCap PWA capacitor 18 uF / 160 Vdc
  • Audaphon MKP CAP Superior 2.2 uF / 400 Vdc
  • Audaphon MKP CAP Superior 3.3 uF / 400 Vdc
  • Audaphon MKP CAP Superior 10 uF / 400 Vdc
  • Mundorf air core coil L140, 0.33 mH/0.15 Ohm
  • 1.0 mm air core coil, 0.68 mH/0.39 Ohm
  • 0.7 mm air core coil, 4.7 mH/2.19 Ohm
  • Mundorf H core coil H140, 2.2 mH/0.14 0hm
  • ceramic resistor 5.6 Ohm/20 Watt
  • ceramic resistor 8.2 Ohm/20 Watt

Kit without cabinet, price per speaker   EUR 975,00 excl. VAT: € 819.33 / $ 934.03

Kit with high-end crossover

The high-end kit is delivered with 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. The capacitors for the Audaphon AMT 1i are of type polypropylen (MKP) Clarity-Cap CSA 630 V.

Kit with high-end-crossover without cabinet, price per speaker   EUR 1080,00 excl. VAT: € 907.56 / $ 1034.62

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 14,50 excl. VAT: € 12.18 / $ 13.89

universal PCB

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 / $ 11.21
We recommend one board per kit (2 boards per speaker pair)


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