Mona Modular   Floorstanding as in Hobby Hifi 2-3/2024

Technical data
  • impedance: 8 Ohm
  • sensivity (2,83V/1m): 87 dB
  • size (HxWxD): 1400 x 220 x 350 mm
  • frequency range (-8dB): 30 - 30000 Hz
  • crossover frequency(s): 300, 2100 Hz
  • speaker type: bass reflex

Mona Modular is a two and a half way floorstanding speaker.

Mona Modular is a bass-reflex cabinet loudspeaker with drivers of Monacor .

The kit is delivered with the following drivers:
- a Monacor DT-352NF tweeter
- a Monacor SPH-135C midrange / bass driver
- a Monacor SPH-135C woofer

The loudspeaker has been developed by Bernd Timmermanns.

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 mids-woofer.
- 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 is perfect.

At medium volume, i.e. 90 dB at 1 m, the nonlinear distortions are below 1% above 100 Hz.

An excerpt from the Hobby HiFi review

Conclusion of the magazine Hobby HiFi:

Our kit consists of

  • 4x Monacor SPH-135 C mids-woofer
  • DT-352NF
  • 0,5x PE sealing tape, 5x2 mm, 7.5 m
  • 2x Damping Sonofil 100 x 35 cm for 20 litres
  • 3x Audaphon Damping 10, 970 x 470 mm, adhesive
  • 2x Binding Post PK31, gold plated (one pair, red and black)
  • 3m Speaker cable 2x2.5 mm2, transparent
  • 0,5x Pan screws 4x20 black, torx, 8 pieces
  • 2x 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 MKT CAP 4.7 μF / 160 Vdc
  • Audaphon MKT CAP 6.8 μF / 160 Vdc
  • Audaphon MKT CAP 10 μF / 160 Vdc
  • JB, electrolytic capacitor, bipolar, 220 μF/50 Vdc
  • 2x JB, electrolytic capacitor, bipolar advanced, 10 μF / 100 Vdc
  • 1.0 mm air core coil, 0.39 mH/0.29 Ohm
  • 1.0 mm air core coil, 0.68 mH/0.39 Ohm
  • 1.0 mm air core coil, 1.2 mH/0.54 Ohm
  • Mundorf H core coil H71, 27 mH/1.68 0hm
  • Mundorf H core coil H100, 6.8 mH/0.46 0hm
  • Metal-oxide resistor, 10W 3.9 Ohm (orange-white-gold)
  • Metal-oxide resistor, 10W 12 Ohm (brown-red-black)
  • Metal-oxide resistor, 10W 18 Ohm (brown-grey-black)
  • 2x Metal-oxide resistor, 5W 15 Ohm (brown-green-black)

Kit without cabinet, price per speaker   EUR 805,00 excl. VAT: € 676.47 / $ 730.59

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 Monacor DT-352NF are of type polypropylen (MKP) Audaphon MKP CAP Superior 400 V.

  • Audaphon MKP CAP Superior 4.7 μF / 400 Vdc
  • Audaphon MKP CAP Superior 6.8 μF / 400 Vdc
  • Audaphon MKP CAP Superior 10 μF / 400 Vdc
  • 2x Audaphon MKT CAP 10 μF / 160 Vdc
  • JB, electrolytic capacitor, bipolar, 220 μF/50 Vdc
  • Mundorf baked varnish air core coil BL71, 27 mH/6.44 Ohm
  • Mundorf baked varnish air core coil BL100, 0.39 mH/0.29 Ohm
  • Mundorf baked varnish air core coil BL100, 0.68 mH/0.39 Ohm
  • Mundorf baked varnish air core coil BL100, 1.2 mH/0.54 Ohm
  • Mundorf bs100 core coil 6.8 mH/0.56Ohm
  • Metal-oxide resistor, 10W 3.9 Ohm (orange-white-gold)
  • Metal-oxide resistor, 10W 6.8 Ohm (blue-grey-gold)
  • Metal-oxide resistor, 10W 18 Ohm (brown-grey-black)
  • 2x Metal-oxide resistor, 5W 15 Ohm (brown-green-black)

Kit with high-end-crossover without cabinet, price per speaker   EUR 897,00 excl. VAT: € 753.78 / $ 814.08

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.     - not available (_)

universal PCB

If you prefer to mount the crossover components on a 159 x 127 mm universal PCB instead on wood:
Universal PCB RA160, order no.. str-RA160, price per unit:   EUR 5,90 excl. VAT: € 4.96 / $ 5.35
Universal PCB RA240, order no.. str-RA240, price per unit:   EUR 8,60 excl. VAT: € 7.23 / $ 7.81
We recommend one board (each) per kit (two boards (each) for a speaker pair)


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