Heartcore AMT, Floorstanding   as in Hobby Hifi 3/2014

Technical data
- impedance: 8 Ohm
- sensivity (2,83V/1m): 82 dB
- size (HxWxD): 1076 x 310 x 400 mm
- frequency range (-8dB): 21 - 28000 Hz
- crossover frequency(s): 150, 2000 Hz
- speaker type: passive radiator

Heartcore is a design of Bernd Timmermanns, one of the most famous speaker designers in Germany. The Heartcore delivers tight, clean bass in a compact chassis, perfect for highend hifi or homecinema applications.

You receive Haertcore in two variations: with highend tweeter Wavecor TW030WA10 with cone of Dr. Kurt Müller from Germany, Krefeld or with Air Motion Transformer (AMT) of Audaphon.

For midrange the Wavecor WF182 BD04 is used. The bass is provided by a 26 cm Wavecor woofer, together with a 26 cm passive radiator. A bass reflex tube with an adequate resonance frequency would be quite long and, therefore, a passive driver was chosen instead.
 

You can use an exotic housing (PEAK LSV) or a simple housing which is easy to rebuild.

The crossover consists of second-order filters.

The frequency response of the speaker-system is very flat; the decay spectrum is excellent and the non-linear distortions remain almost consistently below 0.3% at 90 dB SPL. These are excellent characteristics.
 

  

Our kit consists of

  • Audaphon air motion transformer AMT-1i
  • Wavecor Mid/Woofer WF182BD04, die cast
  • Wavecor Subwoofer SW263WA01, die cast
  • Wavecor PR263WA01 Passive Radiator
  • 4x Damping fleece MT Bondum 800 (30 x 50 x 2 cm)
  • PE sealing tape, 5x2 mm, 7.5 m
  • 0,5x Damping Sonofil 100 x 35 cm for 20 litres
  • 0,5x Audaphon Damping 10, 970 x 470 mm, adhesive
  • Binding Post PK31, gold plated (one pair, red and black)
  • 4m Speaker cable 2x2.5 mm2, transparent
  • Allen wood screws, black, 5x30 mm, 16 pieces
  • Allen wood screws, black, 4X25MM, 8 pieces
  • Plan for DIY kit

the crossover components (right),
to be mounted on a piece of wood

  • Mundorf MCAP EVO Oil 4.7 uF / 450 V
  • ClarityCap PWA capacitor 8.2 uF / 160 Vdc
  • ClarityCap PWA capacitor 68 uF / 160 Vdc
  • Mundorf, electrolytic capacitor, etched, 470 uF/63 Vdc
  • Mundorf, electrolytic capacitor, unetched, 150 uF / 50 Vdc (68uF+82 uF in parallel)
  • Mundorf baked varnish air core coil BL71, 0.68 mH/0.71 Ohm
  • Mundorf baked varnish air core coil BL71, 2.2 mH/1.3 Ohm
  • Mundorf baked varnish air core coil BL71, 39 mH / 10.3 Ohm
    (12 mH/3.9 Ohm and 27 mH/6.44 Ohm in series)
  • Mundorf bs140 core coil 12mH/0.42Ohm
  • Mundorf H core baked varnish coil BH100, 10 mH/0.63 0hm
  • 2x Metal-oxide resistor, 5W 1.0 Ohm (brown-black-gold)
  • Metal-oxide resistor, 10W 2.2 Ohm (red-red-gold)
  • Metal-oxide resistor, 10W 6.8 Ohm (blue-grey-gold)
  • Metal-oxide resistor, 10W 12 Ohm (brown-red-black)

Kit without cabinet, price per speaker EUR 1243,00 excl. VAT: € 1044.54 / $ 1211.66

Kit with high-end crossover

The kit with high-end crossover contains copper foil coils in series to the loudspeakers. In the Crossover of second order, better capacitors are used.

  • Mundorf MCAP Supreme silver/gold/oil 4.7 uF / 1000 V
  • Mundorf MCAP EVO Oil 8.2 uF / 450 V
  • Mundorf MCAP EVO Oil 68 uF / 350 V
  • Capacitor 150 uF
    ClarityCap PWA capacitor 47 uF / 160 Vdc and Mundorf, electrolytic capacitor, unetched, 100uF / 50 Vdc in parallel
  • Mundorf, electrolytic capacitor, etched, 470 uF/63 Vdc
  • Mundorf baked varnish air core coil BL71, 39 mH / 10.3 Ohm
    (12 mH/3.9 Ohm and 27 mH/6.44 Ohm in series)
  • Mundorf copper foil coil CFC14-0.68mH/0.20Ohm
  • Mundorf copper foil coil CFC14-2.2mH/0.41Ohm
  • Mundorf H core baked varnish coil BH100, 10 mH/0.63 0hm
  • Mundorf CFS12 coil, 12 mH/0.31 Ohm
  • 2x Metal-oxide resistor, 5W 1.0 Ohm (brown-black-gold)
  • Metal-oxide resistor, 10W 3.3 Ohm (orange-orange-gold)
  • Metal-oxide resistor, 10W 6.8 Ohm (blue-grey-gold)
  • Metal-oxide resistor, 10W 12 Ohm (brown-red-black)

Kit with high-end-crossover without cabinet, price per speaker EUR 1557,00 excl. VAT: € 1308.40 / $ 1517.75

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 MKP CAP Superior 15 uF / 400 Vdc
  • Mundorf baked varnish air core coil BL71, 0.68 mH/0.71 Ohm
  • Metal-oxide resistor, 10W 18 Ohm (brown-grey-black)
  • Metal-oxide resistor, 10W 22 Ohm (red-red-black)


Price per impedance correction for one speaker, to be mounted on a small wooden board.   EUR 17,80 excl. VAT: € 14.96 / $ 17.35

universal 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.. I-2766, price per unit: EUR 5,10 excl. VAT: € 4.29 / $ 4.97
We recommend three boards per kit (six boards for a speaker pair)
 


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