Audimax Micro BE   Shelf speaker as in Hobby Hifi 2/2018

Technical data
  • impedance: 10 Ohm
  • sensivity (2,83V/1m): 78,5 dB
  • size (HxWxD): 335 x 200 x 280 mm
  • frequency range (-8dB): 40 - 40000 Hz
  • crossover frequency(s): 1800 Hz
  • speaker type: closed box

Audimax Micro BE is a two way compact speaker.

Audimax Micro BE is a closed-cabinet loudspeaker with drivers of SEAS and SB Acoustics.

The kit is delivered with the following drivers:
- a SB Acoustics Satori TW29BN tweeter
- a Hobby-HiFI/SEAS 18MW12T 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 0.4% above 200 Hz.

Our kit consists of

  • woofer Hobby-HiFi 18MW12T
  • tweeter SB Acoustics SATORI-TW29BN
  • 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 Audaphon Damping 10, 970 x 470 mm, adhesive
  • Binding Post PK31, gold plated (one pair, red and black)
  • 2m Speaker cable 2x2.5 mm2, transparent
  • 1.5x Pan screws 4x20 black, 8 pieces
  • Plan for DIY kit

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

  • ClarityCap PWA capacitor 33 μF / 160 Vdc
  • Audaphon MKP CAP Superior 0.33 μF / 400 Vdc
  • Audaphon MKP CAP Superior 2.2 μF / 400 Vdc
  • Audaphon MKP CAP Superior 3.3 μF / 400 Vdc
  • Audaphon MKP CAP Superior 4.7 μF / 400 Vdc
  • Audaphon MKP CAP Superior 6.8 μF / 400 Vdc
  • electrolytic capacitor, unetched, 68uF / 50 Vdc
  • 2x electrolytic capacitor, unetched, 100uF / 50 Vdc
  • Mundorf baked varnish air core coil BL71, 0.47 mH/0.57 Ohm
  • Mundorf baked varnish air core coil BL71, 4.7 mH/2.19 Ohm
  • Mundorf baked varnish air core coil BL71, 15 mH/4.45 Ohm
  • Mundorf baked varnish air core coil BL100, 1.0 mH/0.49 Ohm
  • Mundorf baked varnish air core coil BL140, 4.7 mH/0.83 Ohm
  • 2x Metal-oxide resistor, 10W 10 Ohm (brown-black-black)
  • 2x Metal-oxide resistor, 5W 1.0 Ohm (brown-black-gold)
  • Metal-oxide resistor, 5W 2.7 Ohm (red-purple-gold)
  • Metal-oxide resistor, 5W 27 Ohm (red-purple-black)

Kit without cabinet, price per speaker   EUR 1192,00 excl. VAT: € 1001.68 / $ 1091.83

Kit with high-end crossover

The high-end kit is delivered with Mundorf copper foil coils or baked varnish air core coils 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. Most capacitors are Mundorf MCAP EVO or EVO-Oil and one Mundorf MCAP Supreme silver/gold/oil 3.3 μF / 1000 V.

Kit with high-end-crossover without cabinet, price per speaker   EUR 1589,00 excl. VAT: € 1335.29 / $ 1455.47

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 18,30 excl. VAT: € 15.38 / $ 16.76

universal PCB

If you prefer to mount the crossover components on a 240 x 165 mm universal PCB instead on wood:
Universal PCB RA240, order no.. str-RA240, price per unit:   EUR 8,60 excl. VAT: € 7.23 / $ 7.88
We recommend one board per kit (two boards for a speaker pair)


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