Mona 176 GHP   Shelf speaker as in Hobby Hifi 1/2023

Technical data
  • impedance: 8 Ohm
  • sensivity (2,83V/1m): 82 dB
  • size (HxWxD): 400 x 220 x 300 mm
  • frequency range (-8dB): 40 - 35000 Hz
  • crossover frequency(s): 3000 Hz
  • speaker type: closed box

Mona 176 GHP is a two way compact speaker.

Mona 176 GHP is a closed-cabinet loudspeaker with drivers of Monacor .

The kit is delivered with the following drivers:
- a Monacor Monacor AIRMT-85 air motion transformer (ribbon-tweeter)
- a Monacor SPH-176 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 woofer.

The frequency response of this speaker is nearly 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 1,5% above 200 Hz.

An excerpt from the Hobby HiFi review

Conclusion of the magazine Hobby HiFi:

Our kit consists of

  • Monacor AIRMT-85
  • Monacor SPH-176 woofer
  • 0,5x Damping fleece MT Bondum 800 (30 x 50 x 2 cm)
  • 0,5x PE sealing tape, 5x2 mm, 7.5 m
  • 0,5x Damping Sonofil 100 x 35 cm for 20 litres
  • Binding Post PK31, gold plated (one pair, red and black)
  • 1,5m Speaker cable 2x2.5 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 MKT CAP 4.7 μF / 160 Vdc
  • Audaphon MKT CAP 5.6 μF / 160 Vdc
  • Audaphon MKT CAP 10 μF / 160 Vdc
  • Mundorf, electrolytic capacitor, etched, 220 μF/63 Vdc
  • Mundorf, electrolytic capacitor, etched, 270 μF/63 Vdc
  • 1.0 mm air core coil, 0.47 mH/0.32 Ohm
  • 0.7 mm air core coil, 0.27 mH/0.44 Ohm
  • Audaphon M core coil M14, 3.9 mH/0.22 0hm
  • Mundorf ferrite core coil P50 10 mH/3.49Ohm
  • Metal-oxide resistor, 10W 3.9 Ohm (orange-white-gold)
  • Metal-oxide resistor, 10W 5.6 Ohm (green-blue-gold)
  • Metal-oxide resistor, 10W 6.8 Ohm (blue-grey-gold)
  • Metal-oxide resistor, 10W 15 Ohm (brown-green-black)

Kit without cabinet, price per speaker   EUR 338,00 excl. VAT: € 284.03 / $ 303.92

Price for a pair of custom speakers of any color   - not available (_)

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 Monacor AIRMT-85 are of type polypropylen (MKP) Audaphon MKP CAP Superior 400 V.

  • Audaphon MKP CAP Superior 4.7 μF / 400 Vdc
  • Audaphon MKP CAP Superior 5.6 μF / 400 Vdc
  • Audaphon MKP CAP Superior 10 μF / 400 Vdc
  • Mundorf, electrolytic capacitor, etched, 220 μF/63 Vdc
  • Mundorf, electrolytic capacitor, etched, 270 μF/63 Vdc
  • Mundorf baked varnish air core coil BL100, 0.47 mH/0.32 Ohm
  • Mundorf baked varnish ferrite core coil BP71 10 mH/2.19Ohm
  • Mundorf H core baked varnish coil BH140, 3.9 mH/0.22 0hm
  • Metal-oxide resistor, 10W 3.9 Ohm (orange-white-gold)
  • 2x Metal-oxide resistor, 10W 6.8 Ohm (blue-grey-gold)
  • Metal-oxide resistor, 10W 15 Ohm (brown-green-black)

Kit with high-end-crossover without cabinet, price per speaker   EUR 376,00 excl. VAT: € 315.97 / $ 338.08

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).

  • JB, electrolytic capacitor, bipolar, 68 μF/100 Vdc
  • 0.7 mm air core coil, 0.33 mH/0.48 Ohm
  • ceramic resistor 6.8 Ohm/20 Watt

Price per impedance correction for one speaker, to be mounted on a small wooden board.     EUR 9,00 excl. VAT: € 7.56 / $ 8.09

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 / $ 5.31
We recommend one board per kit (two boards for a speaker pair)


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