Lia AMT   Shelf speaker as in K+T 5/2014

Technical data
  • impedance: 4 Ohm
  • sensivity (2,83V/1m): 85 dB
  • size (HxWxD): 450 x 250 x 300 mm
  • frequency range (-8dB): 32 - 30000 Hz
  • crossover frequency(s): 2200 Hz
  • speaker type: bass reflex

Daniel Gattig and Dennis Frank have been looking for chassis for a perfect shelf speaker. The intension was to find a tweeter that sounds airy-dynamically; this can be found at air motion transformers. They selected Audaphon AMT 1i, which was named in journal Klang+Ton 4/2014 one of the best in its "weight league". A woofer Wavecor WF182BD12 in bass-reflex cabinet leads to a precise but powerful bass reproduction.

You need more? Have a look at Angara.

The crossover consists of 2rd order filters (12 dB per octave slope).

The frequency response of the speaker-system is flat till 23 000 Hz; the decay spectrum is excellent except some resonances at 500 till 1300 Hz. The non-linear distortions remain almost consistently below 0.3% at 85 dB SPL (above 600 Hz). These are excellent characteristics. If you need better results you should have a look at Angara.

An excerpt from the Klang+Ton review

"One can hear the measured linearity of Lia AMT as well. As expected, when pointing both loudspeakers directly at the listening position they produces the most high frequency energy and that gives an almost surgically precise spatial impression. When the speakers are positioned parallel to the side walls of the listening room, a somewhat more diffuse spatial image is obtained, but with an incredibly atmospheric and organic impression of the virtual stage. In between, there are an infinite number of gradations. With this tweeter it is worth experimenting various options. The midwoofer stands up to amazing sound pressure levels and bravely keeps up with the AMT in terms of precision and dynamics. The decision to use an enclosure of this size was the right one: the Wavecor midwoofer is even capable of impressively deep bass and even up to levels that you would normally not trust any bookshelf loudspeakers in general."

Conclusion of the magazine Klang+Ton:

The Lia AMT is slightly larger and slightly more expensive than stand-mount loudspeakers that we normally see. But it is just much better in all disciplines a huge recommendation!

Our kit consists of

  • Audaphon air motion transformer AMT-1i
  • Wavecor Mid/Woofer WF182BD11
  • 2x Bass reflex tube HP70, 68x160 mm, black
  • 2x 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
  • Allen wood screws IS 4x16mm, black
  • Plan for DIY kit

the crossover components (right),
to be mounted on a small wooden board.
  • Audaphon MKP CAP Superior 3.3 uF / 400 Vdc
  • Audaphon MKP CAP Superior 8.2 uF / 400 Vdc
  • Audaphon MKT CAP 1.0 uF / 160 Vdc
  • Audaphon MKT CAP 22 uF / 160 Vdc
  • Audaphon MKT CAP 33 uF / 160 Vdc
  • 0.7 mm air core coil, 0.33 mH/0.48 Ohm
  • 0.7 mm air core coil, 0.82 mH/0.89 Ohm
  • 0.7 mm air core coil, 1.8 mH/1.15 Ohm
  • 01.4 mm air core coil, 0.68 mH/0.26 Ohm
  • Metal-oxide resistor, 5W 6.8 Ohm (blue-grey-gold)
  • Metal-oxide resistor, 10W 3.3 Ohm (orange-orange-gold)
  • 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)

Kit without cabinet, price per speaker   EUR 609,00 excl. VAT: € 511.76 / $ 588.53

Kit with high-end crossover

Our high-end version employs a Mundorf copper foil coil in series to the woofer. In series to the air motion transformer a Rike Audio S-Cap is used. Elsewhere baked varnish air core coils or ClarityCap ESA and PWA capacitors are used.

Kit without cabinet, price per speaker   EUR 709,00 excl. VAT: € 595.80 / $ 685.17

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 14,60 excl. VAT: € 12.27 / $ 14.11

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.. I-2767, price per unit:   EUR 7,60 excl. VAT: € 6.39 / $ 7.34
We recommend one board per kit (two boards for a speaker pair)


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