Amorosa   Shelf speaker as in K+T 2/2023

Technical data
  • impedance: 4 Ohm
  • sensivity (2,83V/1m): 82 dB
  • size (HxWxD): 355 x 216 x 278 mm
  • frequency range (-8dB): 40 - 40000 Hz
  • crossover frequency(s): 1500 Hz
  • speaker type: bass reflex

Amorosa is a two way compact speaker.

Amorosa is a bass-reflex cabinet loudspeaker with drivers of Bliesma and Purifi.

The kit is delivered with the following drivers:
- a Bliesma T34A-4 tweeter
- a Purify PTT6.5X04-NAA-08 woofer

The loudspeaker has been developed by Thomas Schmidt.

The crossover consists of:
- a 2nd order high-pass filter (12 dB per octave slope) for the tweeter.
- 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 is nearly perfect.

At low volume, i.e. 85 dB at 1 m, the nonlinear distortions are below 0,3% above 200 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

  • Bliesma T34A-4
  • Purify PTT6.5X04-NAA-08 - Purifi Ultra Low Distortion Extended Woofer 6.5 Zoll 4Ω
  • Bass reflex tube HP35, 35x123mm, black
  • 0,5x Damping Sonofil 100 x 35 cm for 20 litres
  • 0,5x Foam N25, 97,5x49x4 cm, black
  • Binding Post PK31, gold plated (one pair, red and black)
  • 1,5x Pan screws 4x20 black, torx, 8 pieces
  • Plan for DIY kit

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

  • Audaphon MKP CAP Superior 10 μF / 400 Vdc
  • Audaphon MKP CAP Superior 15 μF / 400 Vdc
  • 1.4 mm air core coil 1.8 mH/0.41 Ohm
  • 0.7 mm air core coil, 0.33 mH/0.48 Ohm
  • Metal-oxide resistor, 10W 3.9 Ohm (orange-white-gold)
  • Metal-oxide resistor, 10W 12 Ohm (brown-red-black)

Kit without cabinet, price per speaker   EUR 770,00 excl. VAT: € 647.06 / $ 698.82

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 Bliesma T34A-4 are of type polypropylen (MKP) ClarityCap CMR 630 V.

  • ClarityCap ESA capacitor 15 μF / 630 Vdc
  • ClarityCap CMR capacitor 10 μF / 630 Vdc
  • Mundorf copper foil coil CFC14-1.8 mH/0.32Ohm
  • Mundorf baked varnish air core coil BL71, 0.33 mH/0.48 Ohm
  • MResist Supreme 3.9 Ohm / 20 Watt
  • MResist Supreme 12 Ohm / 20 Watt

Kit with high-end-crossover without cabinet, price per speaker   EUR 1103,00 excl. VAT: € 926.89 / $ 1001.04

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
  • 0.7 mm air core coil, 0.68 mH/0.70 Ohm
  • ceramic resistor 6.8 Ohm/20 Watt

Price per impedance correction for one speaker, to be mounted on a small wooden board.     EUR 15,50 excl. VAT: € 13.03 / $ 14.07

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 / $ 4.27
We recommend one board per kit (2 boards per speaker pair)


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