WaveMon 118/13   Shelf speaker as in Hobby Hifi 1/2018

Technical data
  • impedance: 4 Ohm
  • sensivity (2,83V/1m): 85 dB
  • size (HxWxD): 350 x 150 x 280 mm
  • frequency range (-8dB): 44 - 40000 Hz
  • crossover frequency(s): 4300 Hz
  • speaker type: bass reflex

WaveMon 118/13 is a two way compact speaker.

WaveMon 118/13 is a bass-reflex cabinet loudspeaker with drivers of Wavecor .

The kit is delivered with the following drivers:
- a Wavecor TW013WA01 tweeter
- a Wavecor WF118WA05 woofer

The loudspeaker has been developed by Bernd Timmermanns.

The crossover consists of:
- a 2nd order high-pass filter (12 dB per octave slope) for the tweeter.
- a 2nd order low-pass filter (12 dB per octave slope) for the woofer.

The frequency response of this speaker is perfectly linear.

The decay spectrum as shown in the waterfall diagram is exemplary, free of any disturbing resonance.

At medium volume, i.e. 90 dB at 1 m, the nonlinear distortions are below 0,3% above 200 Hz.

An excerpt from the Hobby HiFi review

  • Wavecor silk dome tweeter TW013WA01, 4 Ohm
  • Wavecor Mid/Woofer WF118WA05 glass fiber, 4 Ohm
  • Bass reflex tube HP50, 50x145 mm, black
  • 0,5x Damping Sonofil 100 x 35 cm for 20 litres
  • 0,25x Audaphon Damping 10, 970 x 470 mm, adhesive
  • Binding Post PK31, gold plated (one pair, red and black)
  • 1m Speaker cable 2x2.5 mm2, transparent
  • 0,5x Pan screws 3x17 dark-copper, cross recess, 8 pieces
  • 0,5x Pan screws 3.5x17 black, cross recess, 8 pieces
  • Plan for DIY kit

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

  • ClarityCap PWA capacitor 4.7 uF / 160 Vdc
  • ClarityCap PWA capacitor 4.7 uF / 630 Vdc
  • Mundorf, electrolytic capacitor, etched, 33 uF/100 Vdc
  • Mundorf, electrolytic capacitor, unetched, 10 uF / 70 Vdc
  • Mundorf air core coil L50, 1.5 mH/1.85 0hm
  • 1.0 mm air core coil, 0.47 mH/0.32 Ohm
  • 0.7 mm air core coil, 0.15 mH/0.28 Ohm
  • Metal-oxide resistor, 5W 1.5 Ohm (brown-green-gold)
  • Metal-oxide resistor, 5W 2.7 Ohm (red-purple-gold)

Kit without cabinet, price per speaker   EUR 160,00 excl. VAT: € 134.45 / $ 155.97

For the loudspeaker, an HTB DN50 87° elbow is additionally required for the bass reflex channel from the DIY store or the Internet.

Kit with high-end crossover

The high-end kit is delivered with baked varnish air core coils on important parts of the crossover 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 fullrange driver are of type polypropylen (MKP) Clarity-Cap, 630 V.

Kit with high-end-crossover without cabinet, price per speaker   EUR 190,00 excl. VAT: € 159.66 / $ 185.21

For the loudspeaker, an HTB DN50 87° elbow is additionally required for the bass reflex channel from the DIY store or the Internet.

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 8,60 excl. VAT: € 7.23 / $ 8.38

universal PCB

If you prefer to mount the crossover components on a 140 x 102 mm universal PCB instead on wood:
Universal PCB RA140, order no.. I-2765, price per unit:   EUR 3,70 excl. VAT: € 3.11 / $ 3.61
We recommend one board per kit (two boards for a speaker pair)


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