Audimax Reference Standard   Floorstanding as in Hobby Hifi 1/2021

Technical data
  • impedance: 2 Ohm
  • sensivity (2,83V/1m): 92 dB
  • size (HxWxD): 1620 x 320 x 500 mm
  • frequency range (-8dB): 26 - 40000 Hz
  • crossover frequency(s): 180, 2000 Hz
  • speaker type: bass reflex

Audimax Reference Standard is a three way floorstanding speaker.

Audimax Reference Standard is a bass-reflex cabinet loudspeaker with drivers of Audaphon, Hobby HiFi (Made by SEAS) and Visaton.

The kit is delivered with the following drivers:
- a Audaphon APR 1.0 ribbon-tweeter
- two Hobby-HiFi (Made by SEAS) 18MW12T mids drivers
- two Visaton TIW 250 XS 8 Ohm woofers

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 band pass consisting of a 2nd order high pass filter (12 dB per octave slope) and a 2nd order low-pass filter (12 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 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 0,2% above 100 Hz.

Our kit consists of

  • Audaphon Aluminium Ribbon Tweeter APR 1.0
  • 2x Hobby-HiFi woofer 18MW12T, produced by SEAS
  • 2x Visaton woofer TIW 250 XS, 8 Ohm
  • 4x Damping fleece MT Bondum 800 (30 x 50 x 2 cm)
  • 1,5x Damping 30 1100 x 470 mm, adhesive
  • PE sealing tape, 5x2 mm, 7.5 m
  • Female banana jacks, red and black
  • Binding Post PK28 I, gold plated (one pair, red and black)
  • 2x Banana Tube, LS4, Beryllium copper gold plated, 1 unit
  • 6m Speaker cable 2x2.5 mm2, transparent
  • 1,5x Allen wood screws, black, 5x30 mm, 8 pieces
  • 2,5x Allen wood screws, black, 4x25 mm, 8 pieces
  • Plan for DIY kit

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

  • Mundorf MCAP EVO 0.68 μF; / 450 V
  • Mundorf MCAP EVO 1.5 μF; / 450 V
  • Mundorf MCAP EVO 3.3 μF; / 450 V
  • Mundorf MCAP EVO 15 μF; / 450 V
  • Mundorf MCAP EVO Oil 33 μF; / 450 V
  • Mundorf Mcap Supreme EVO Oil 6,8 μF; / 800V
  • Mundorf Mcap Supreme EVO Oil 15 μF; / 800V
  • Mundorf, electrolytic capacitor, etched, 270 uF/63 Vdc
  • Mundorf, electrolytic capacitor, etched, 330 uF/63 Vdc
  • 2x Mundorf, electrolytic capacitor, etched, 470 uF/63 Vdc
  • Mundorf, electrolytic capacitor, unetched, 100μF / 50 Vdc
  • Mundorf baked varnish air core coil BL71, 0.15 mH/0.28 Ohm
  • Mundorf baked varnish air core coil BL71, 0.33 mH/0.48 Ohm
  • Mundorf baked varnish air core coil BL71, 6.8 mH/2.68 Ohm
  • Mundorf baked varnish air core coil BL100, 0.39 mH/0.29 Ohm
  • Mundorf baked varnish air core coil BL140, 3.3 mH/0.59 Ohm
  • Mundorf baked varnish air core coil BL180, 0,68 mH/0.15 Ohm
  • Mundorf bs180 core coil 4.7mH/0.15 Ohm
  • MResist Supreme 3.3 Ohm / 20 Watt
  • Mresist Classic 6,8 Ohm / 10 Watt
  • Metal-oxide resistor, 10W 3.3 Ohm (orange-orange-gold)
  • Metal-oxide resistor, 10W 33 Ohm (orange-orange-black)

Kit without cabinet, price per speaker   EUR 3110,00 excl. VAT: € 2613.45 / $ 2770.25

Kit with high-end crossover

The high-end kit is delivered with copper foil coils and 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 Audaphon APR 1.0 are of type polypropylen (MKP) Mundorf Mcap Supreme EVO Silver Gold Oil 800V.

  • Mundorf MCAP EVO 270 μF; / 250 V
  • Mundorf MCAP EVO Oil 0.68 μF; / 450 V
  • Mundorf MCAP EVO Oil 1.5 μF; / 450 V
  • Mundorf MCAP EVO Oil 3.3 μF; / 450 V
  • Mundorf MCAP EVO Oil 15 μF; / 450 V
  • Mundorf MCAP EVO Oil 100 μF; / 350 V
  • Mundorf MCAP EVO Silver Gold Öl 33 μF; / 450 V
  • Mundorf Mcap Supreme EVO Silver Gold Oil 6,8 μF; / 800V
  • Mundorf Mcap Supreme EVO Silver Gold Oil 15 μF; / 800V
  • Mundorf, electrolytic capacitor, etched, 330 uF/63 Vdc
  • 2x Mundorf, electrolytic capacitor, etched, 470 uF/63 Vdc
  • Mundorf copper foil coil CFC14-0.15mH/0.08Ohm
  • Mundorf copper foil coil CFC14-0.33mH/0.13Ohm
  • Mundorf copper foil coil CFC14-0.39mH/0.14Ohm
  • Mundorf copper foil coil CFC12-0.68mH/0.13Ohm
  • Mundorf copper foil coil CFC14-3.3mH/0.50Ohm
  • Mundorf baked varnish air core coil BL71, 6.8 mH/2.68 Ohm
  • Mundorf CFS10 coil, 4.7 mH/0.1 Ohm
  • MResist Supreme 3.3 Ohm / 20 Watt
  • Mresist Classic 6,8 Ohm / 10 Watt
  • Mresist ultra 3,3 Ohm, 3/30Watt
  • Mresist ultra 33 Ohm, 3/30Watt
  • Mresist Ultra cooling rod, red 6,5K/W
  • Mresist Ultra Montagepad

Kit with high-end-crossover without cabinet, price per speaker   EUR 4169,00 excl. VAT: € 3503.36 / $ 3713.56

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).

  • Mundorf MCAP EVO 33 μF; / 450 V
  • ceramic resistor 10 Ohm/20 Watt

Price per impedance correction for one speaker, to be mounted on a small wooden board.     EUR 50,50 excl. VAT: € 42.44 / $ 44.98

universal PCB

For one speaker you need 1 pc. of RA240 and 2 pcs. of RA160 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 4,20 excl. VAT: € 3.53 / $ 3.74
Universal PCB RA240, order no.. str-RA240, price per unit:   EUR 8,60 excl. VAT: € 7.23 / $ 7.66
We recommend one board (each) per kit (two boards (each) for a speaker pair)


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