Lucy AMT 22   Shelf speaker as in K+T 5/2022

Technical data
  • impedance: 4 Ohm
  • sensivity (2,83V/1m): 88 dB
  • size (HxWxD): 600 x 200 x 270 mm
  • frequency range (-8dB): 50 - 30000 Hz
  • crossover frequency(s): 2300 Hz
  • speaker type: bass reflex

Lucy AMT 22 is a two way compact speaker.

Lucy AMT 22 is a bass-reflex cabinet loudspeaker with drivers of Mundorf and Wavecor.

The kit is delivered with the following drivers:
- a Mundorf AMTU160W1.1-R air motion transformer (ribbon-tweeter)
- two Wavecor WF152CU13 woofers

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

The crossover consists of:
- a 2nd order high-pass filter (12 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 perfectly linear.

The decay spectrum is nearly perfect.

At low volume, i.e. 85 dB at 1 m, the nonlinear distortions are below 0,6% above 600 Hz and doesn't exceed 0,7% at 95 dB at 1 m between 300 and 15000 Hz.

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

"The Lucy 22 AMT is a bit more gripping in the high frequency range than the Lucy X2 Ribbon, but that's a lot of fun listening. The selected tuning in the low-frequency range is just right for small to medium-sized rooms: precision and sufficient attack in the bass are definitely available, above that there is a very neutral mid-range and dynamic highs with fine resolution and immensely precise localization. Yes, the AMT should be placed at ear level - simply because the speaker then can fully demonstrate its strengths. And because we currently have two suitable candidates on offer: Combined with a low-coupled subwoofer, things really get going: Impressive even with the inexpensive Quatro 5 from BPA - then even more precisely with the DSP-controlled MX12CB by Variant. And because it was just so nice: With the 21-inch Cinecor Sub, things became really big. "

Conclusion of the magazine Klang+Ton:

"A worthy continuation of the Lucy series - elegant sound and fun factor combined in a compact housing."

Our kit consists of

  • 2x WF152CU13, Wavecor Mid/Woofer, 8 Ohm, paper / glass fiber, BD, phase plug
  • Mundorf AMTU160W1.1-R
  • 2x Bass reflex tube HP100, 100x197 mm, black
  • Damping fleece MT Bondum 800 (30 x 50 x 2 cm)
  • 0,5x PE sealing tape, 5x2 mm, 7.5 m
  • Damping Sonofil 100 x 35 cm for 20 litres
  • Binding Post PK28 I, gold plated (one pair, red and black)
  • 2m Speaker cable 2x1.5 mm2 black/red
  • Pan screws 3.5x17 black, torx, 8 pieces
  • 0,5x Visaton Countersunk screws 3.5x25, 8 pcs
  • Plan for DIY kit

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

  • Audaphon MKP CAP Superior 2.2 μF / 400 Vdc
  • Audaphon MKP CAP Superior 6.8 μF / 400 Vdc
  • Audaphon MKP CAP Superior 15 μF / 400 Vdc
  • Mundorf baked varnish air core coil BL71, 0.39 mH/0.51 Ohm
  • Mundorf baked varnish air core coil BL100, 0.15 mH/0.17 Ohm
  • Mundorf baked varnish air core coil BL140, 1.0 mH/0.30 Ohm
  • Metal-oxide resistor, 10W 6.8 Ohm (blue-grey-gold)

Kit without cabinet, price per speaker   EUR 824,00 excl. VAT: € 692.44 / $ 692.44

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 or Mundorf copper foil 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 Mundorf AMTU160W1.1-R are of type polypropylen (MKP) Mundorf Mcap Supreme EVO Öl 800 V.

  • Mundorf MCAP EVO Oil 15 μF / 450 V
  • Mundorf Mcap Supreme EVO Oil 2,2 μF / 800V
  • Mundorf Mcap Supreme EVO Oil 6,8 μF / 800V
  • Mundorf copper foil coil CFC16-0.15 mH/0.11Ohm
  • Mundorf copper foil coil CFC14-1.0 mH/0.23Ohm
  • Mundorf baked varnish air core coil BL71, 0.39 mH/0.51 Ohm
  • MResist Supreme 6.8 Ohm / 20 Watt

Kit with high-end-crossover without cabinet, price per speaker   EUR 986,00 excl. VAT: € 828.57 / $ 828.57

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 33 μF / 160 Vdc
  • ceramic resistor 8.2 Ohm/20 Watt

Price per impedance correction for one speaker, to be mounted on a small wooden board.     EUR 10,50 excl. VAT: € 8.82 / $ 8.82

universal PCB

If you prefer to mount the crossover components on a universal PCB instead on wood
PCB 150x115 mm, tin plated, price per unit:   EUR 4,70 excl. VAT: € 3.95 / $ 3.95
We recommend one board per kit (2 boards per speaker pair)


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