Mona 17   Shelf speaker as in K+T 6/2018

Technical data
  • impedance: 8 Ohm
  • sensivity (2,83V/1m): 81,5 dB
  • size (HxWxD): 390 x 210 x 300 mm
  • frequency range (-8dB): 42 - 40000 Hz
  • crossover frequency(s): 2200 Hz
  • speaker type: closed box

Mona 17 is a two way compact speaker.

Mona 17 is a closed-cabinet loudspeaker with drivers of Monacor .

The kit is delivered with the following drivers:
- a Monacor DT-352NF tweeter
- a Monacor SPH-174KE 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 0,5% above 200 Hz.

Our kit consists of

  • DT-352NF
  • Monacor SPH-174KE HiFi bass driver
  • Damping fleece MT Bondum 800 (30 x 50 x 2 cm)
  • 0,5x PE sealing tape, 5x2 mm, 7.5 m
  • 0,5x Audaphon Damping 10, 970 x 470 mm, adhesive
  • Binding Post PK31, gold plated (one pair, red and black)
  • 2m Speaker cable 2x1.5 mm2, transparent
  • Allen wood screws, black, 4x25 mm, 8 pieces
  • Plan for DIY kit

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

  • Audaphon MKP CAP Superior 3.3 uF / 400 Vdc
  • Mundorf, electrolytic capacitor, etched, 470 uF/63 Vdc
  • 2x Mundorf, electrolytic capacitor, unetched, 6.8 uF / 70 Vdc
  • 0.7 mm air core coil, 0.68 mH/0.70 Ohm
  • Mundorf Aronit core coil a100 2.7mH/0.57Ohm
  • Mundorf ferrite core coil F50 10mH/3.49Ohm
  • Metal-oxide resistor, 10W 5.6 Ohm (green-blue-gold)
  • Metal-oxide resistor, 5W 10 Ohm (brown-black-black)
  • Metal-oxide resistor, 5W 15 Ohm (brown-green-black)

Kit without cabinet, price per speaker   EUR 175,00 excl. VAT: € 147.06 / $ 167.65

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 capacitor for the tweeter is of type polypropylen (MKP) Mundorf Mcap EVO Öl 450 V.

Kit with high-end-crossover without cabinet, price per speaker   EUR 209,00 excl. VAT: € 175.63 / $ 200.22

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 10,05 excl. VAT: € 8.45 / $ 9.63

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 / $ 3.54
We recommend one board per kit (two boards for a speaker pair)


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