Mona 10 RBT   Shelf speaker as in Hobby Hifi 1/2020

Technical data
  • impedance: 6 Ohm
  • sensivity (2,83V/1m): 84 dB
  • size (HxWxD): 300 x 158 x 238 mm
  • frequency range (-8dB): 48 - 31000 Hz
  • crossover frequency(s): 4500 Hz
  • speaker type: bass reflex

Mona 10 RBT is a two way compact speaker.

Mona 10 RBT is a bass-reflex cabinet loudspeaker with drivers of Monacor .

The kit is delivered with the following drivers:
- a Monacor RBT-10 ribbon-tweeter
- a Monacor SP-60/4 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 2nd order low-pass filter (12 dB per octave slope) for the woofer.

The frequency response of this speaker is nearly linear.

The decay spectrum is perfect.

At medium volume, i.e. 90 dB at 1 m, the nonlinear distortions are below 1% above 300 Hz.

Our kit consists of

  • Ribbon tweeter Monacor RBT-10
  • Monacor SP-60/4
  • Bass reflex tube HP35, 35x125 mm, black
  • 0,25x Damping Sonofil 100 x 35 cm for 20 litres
  • Binding Post PK31, gold plated (one pair, red and black)
  • 2m Speaker cable 2x1.5 mm2, transparent
  • Pan screws 4x20 black, torx, 8 pieces
  • Plan for DIY kit

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

  • Audaphon MKP CAP Superior 3.3 μF / 400 Vdc
  • Audaphon MKP CAP Superior 4.7 μF / 400 Vdc
  • JB, electrolytic capacitor, bipolar, 82 μF/100 Vdc
  • JB, electrolytic capacitor, bipolar advanced, 6.8 μF / 100 Vdc
  • 1.0 mm air core coil, 0.33 mH/0.26 Ohm
  • 1.0 mm air core coil, 0.68 mH/0.39 Ohm
  • 0.7 mm air core coil, 0.18 mH/0.36 Ohm
  • Metal-oxide resistor, 10W 6.8 Ohm (blue-grey-gold)
  • Metal-oxide resistor, 5W 6.8 Ohm (blue-grey-gold)
  • Metal-oxide resistor, 5W 33 Ohm (orange-orange-black)

Kit without cabinet, price per speaker   EUR 211,00 excl. VAT: € 177.31 / $ 189.72

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 RBT-10 are of type polypropylen (MKP) Mundorf EVO ÖL.

Kit with high-end-crossover without cabinet, price per speaker   EUR 265,00 excl. VAT: € 222.69 / $ 238.28

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 9,30 excl. VAT: € 7.82 / $ 8.36

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.. str-RA140, price per unit:   EUR 4,20 excl. VAT: € 3.53 / $ 3.78
We recommend one board per kit (two boards for a speaker pair)

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