Lautsprecher-Berlin Studio AMT   Shelf speaker as in K+T 3/2022

Technical data
  • impedance: 4 Ohm
  • sensivity (2,83V/1m): 89 dB
  • size (HxWxD): 350 x 250 x 250 mm
  • frequency range (-8dB): 42 - 32000 Hz
  • crossover frequency(s): Hz
  • speaker type: passive radiator

Lautsprecher-Berlin Studio AMT is a two way compact speaker.

Lautsprecher-Berlin Studio AMT is a loudspeaker with drivers of Mundorf and SB Acoustics. Passive radiators provide deep bass.

The kit is delivered with the following drivers:
- a Mundorf AMTU80W1.1 air motion transformer (ribbon-tweeter)
- a SB Acoustics SATORI-MW19P-4 woofer

The loudspeaker has been developed by Wolfgang Graßhoff, Michael Warkentien and Thomas Kirschnick.

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 nearly linear.

The decay spectrum is perfect.

At low volume, i.e. 85 dB at 1 m, the nonlinear distortions are below 0,4% above 300 Hz and doesn't exceed 0,8% at 95 dB at 1 m between 300 and 15000 Hz.

Our kit consists of

  • SB Acoustics midwoofer SATORI-MW19P-4, neodymium, papyrus cone
  • SB Acoustics passive radiator SB15SFCR-00, 5x8 inch
  • Mundorf AMTU80W1.1
  • 0,5x PE sealing tape, 5x2 mm, 7.5 m
  • 0,5x 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
  • 2x 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 MKT CAP 4.7 μF / 160 Vdc
  • Audaphon MKT CAP 22 μF / 160 Vdc
  • Audaphon MKT CAP 33 μF / 160 Vdc
  • 1.3 mm air core coil, 0.82 mH/0.275 Ohm
  • 0.7 mm air core coil, 0.68 mH/0.70 Ohm
  • 0.7 mm air core coil, 1.5 mH/1.13 Ohm
  • Metal-oxide resistor, 10W 3.3 Ohm (orange-orange-gold)
  • Metal-oxide resistor, 10W 4.7 Ohm (yellow-violet-gold)
  • Metal-oxide resistor, 10W 6.8 Ohm (blue-grey-gold)

Kit without cabinet, price per speaker   EUR 524,00 excl. VAT: € 440.34 / $ 440.34

Kit with high-end crossover

The high-end kit is delivered with baked varnish air core coils 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 capacitor for the Mundorf AMTU80W1.1 is of type polypropylen (MKP) Clarity-Cap CSA 250 V.

  • ClarityCap CSA capacitor 10 μF / 250 Vdc
  • Audaphon MKP CAP Superior 4.7 μF / 400 Vdc
  • Audaphon MKP CAP Superior 22 μF / 400 Vdc
  • Audaphon MKT CAP 33 μF / 160 Vdc
  • Mundorf baked varnish air core coil BL71, 0.68 mH/0.71 Ohm
  • Mundorf baked varnish air core coil BL71, 1.5 mH/1.13 Ohm
  • Mundorf baked varnish air core coil BL140, 0.82 mH/0.26 Ohm
  • Metal-oxide resistor, 10W 3.3 Ohm (orange-orange-gold)
  • Metal-oxide resistor, 10W 4.7 Ohm (yellow-violet-gold)
  • Metal-oxide resistor, 10W 6.8 Ohm (blue-grey-gold)

Kit with high-end-crossover without cabinet, price per speaker   EUR 578,00 excl. VAT: € 485.71 / $ 485.71

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 68 μF / 160 Vdc
  • 0.7 mm air core coil, 0.15 mH/0.28 Ohm
  • ceramic resistor 8.2 Ohm/20 Watt

Price per impedance correction for one speaker, to be mounted on a small wooden board.     EUR 23,70 excl. VAT: € 19.92 / $ 19.92

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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