AmTon 220 Compact   Floorstanding as in K+T 4/2023

Technical data
  • impedance: 4 Ohm
  • sensivity (2,83V/1m): 92 dB
  • size (HxWxD): 1300 x 302 x 730 mm
  • frequency range (-8dB): 26 - 28000 Hz
  • crossover frequency(s): 200, 2500 Hz
  • speaker type: bass reflex
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AmTon 220 Compact is a three way floorstanding speaker.

AmTon 220 Compact is a bass-reflex cabinet loudspeaker with drivers of Audaphon and Accuton.

The kit is delivered with the following drivers:
- a Audaphon AMT-1i air motion transformer
- two Accuton C168-6-890 mids drivers
- two Accuton S220-6-224-FG woofers

The loudspeaker has been developed by Dennis Frank and Daniel Gattig.

The crossover consists of:
- a first order high-pass filter (6 dB per octave slope) for the tweeter.
- a band pass consisting of a first order high pass filter (6 dB per octave slope) and a first order low-pass filter (6 dB per octave slope) for the mids-woofer.
- a 3rd order low-pass filter (18 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 low volume, i.e. 85 dB at 1 m, the nonlinear distortions are below 0,3% above 300 Hz and doesn't exceed 0,6% at 95 dB at 1 m between 300 and 15000 Hz.

An excerpt from the Klang+Ton review (Translation of the author into English)

Conclusion of the magazine Klang+Ton:

Our kit consists of

  • 2x Accuton S220-6-224-FG woofer, one unit
  • 2x Accuton C168-6-890 mids/woofer, 4D concept driver, one unit
  • Audaphon AMT-1i
  • 4x Bass reflex tube HP100, 100x197 mm, black
  • 18x Damping fleece MT Bondum 800 (30 x 50 x 2 cm)
  • 5x Binding Post PK28 I, gold plated (one pair, red and black)
  • 4m Speaker cable 2x1.5 mm2 black/red
  • 0,5x Visaton Countersunk screws 3.5x25, 8 pcs
  • 3x Allen wood screws, black, 4x25 mm, 8 pieces
  • 12x Adam Hall 4907 rubber foot
  • Plan for DIY kit

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

  • ClarityCap PWA capacitor 1.5 μF / 400 Vdc
  • ClarityCap PWA capacitor 3.9 μF / 400 Vdc
  • ClarityCap PWA capacitor 4.7 μF / 400 Vdc
  • Jantzen Cross Cap MKP capacitor 220 μF / 400V
  • Mundorf, electrolytic capacitor, etched, 680 μF/63 Vdc
  • JB, electrolytic capacitor, bipolar, 220 μF/50 Vdc
  • JB, electrolytic capacitor, bipolar, 330 μF/50 Vdc
  • Mundorf baked varnish air core coil BL140, 1.5 mH/0.38 Ohm
  • 1.0 mm air core coil, 0.39 mH/0.29 Ohm
  • 0.7 mm air core coil, 0.10 mH/0.27 Ohm
  • Mundorf H core coil H71, 10 mH/0.87 0hm
  • Mundorf H core coil H71, 15 mH/1.15 0hm
  • Mundorf H core baked varnish coil BH140, 5.6 mH/0.29 0hm
  • ceramic resistor 2.7 Ohm/20 Watt
  • ceramic resistor 6.8 Ohm/20 Watt
  • Metal-oxide resistor, 10W 1.0 Ohm (brown-black-gold)
  • Metal-oxide resistor, 10W 6.8 Ohm (blue-grey-gold)

Kit without cabinet, price per speaker   EUR 6176,00 excl. VAT: € 5189.92 / $ 5708.91

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 Audaphon AMT-1i are of type polypropylen (MKP) Clarity-Cap MR and CMR 630 V.

  • ClarityCap MR capacitor 1.5 μF / 630 Vdc
  • ClarityCap CMR capacitor 3.9 μF / 630 Vdc
  • Mundorf MCAP EVO 4.7 μF / 450 V
  • Mundorf MCAP EVO 220 μF / 250 V
  • Mundorf, electrolytic capacitor, etched, 220 μF/63 Vdc
  • Mundorf, electrolytic capacitor, etched, 330 μF/63 Vdc
  • Mundorf, electrolytic capacitor, etched, 680 μF/63 Vdc
  • Mundorf copper foil coil CFC18-0.39 mH mH/0.28Ohm
  • Mundorf baked varnish air core coil BL71, 0.10 mH/0.23 Ohm
  • Mundorf baked varnish air core coil BL140, 1.5 mH/0.38 Ohm
  • Mundorf H core baked varnish coil BH71, 10 mH/0.87 0hm
  • Mundorf H core baked varnish coil BH71, 15 mH/1.15 0hm
  • Mundorf H core baked varnish coil BH140, 5.6 mH/0.29 0hm
  • MResist Supreme 2.7 Ohm / 20 Watt
  • 2x MResist Supreme 6.8 Ohm / 20 Watt
  • Mresist Classic 1,0 Ohm / 10 Watt

Kit with high-end-crossover without cabinet, price per speaker   EUR 6484,00 excl. VAT: € 5448.74 / $ 5993.61

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).

  • Audaphon MKT CAP 15 μF / 160 Vdc
  • 2x ceramic resistor 12 Ohm/20 Watt

Price per impedance correction for one speaker, to be mounted on a small wooden board.     EUR 9,30 excl. VAT: € 7.82 / $ 8.60

universal PCB

If you prefer to mount the crossover components on a universal PCB instead on wood
PCB 220x155 mm, order no. I-8805002, price per unit:   EUR 11,80 excl. VAT: € 9.92 / $ 10.91
We recommend two boards per kit (four boards for a speaker pair)


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