Alhambra AMT   Floorstanding as in Hobby Hifi 2-3/2023

Technical data
  • impedance: 4 Ohm
  • sensivity (2,83V/1m): 86 dB
  • size (HxWxD): 1050 x 210 x 350 mm
  • frequency range (-8dB): 28 - 35000 Hz
  • crossover frequency(s): 200, 2500 Hz
  • speaker type: bass reflex

Alhambra AMT is a three way floorstanding speaker.

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

The kit is delivered with the following drivers:
- a Mundorf AMTU60W1.1 air motion transformer (ribbon-tweeter)
- two Wavecor WF120CU08 mids drivers
- two Wavecor SW182BD04 woofers

The loudspeaker has been developed by Bernd Timmermanns.

The crossover consists of:
- a 3rd order high-pass filter (18 dB per octave slope) for the tweeter.
- a band pass consisting of a 2nd order high pass filter (12 dB per octave slope) and a 3rd order low-pass filter (18 dB per octave slope) for the mids-woofer.
- 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 as shown in the waterfall diagram is exemplary, free of any disturbing resonance.

At medium volume, i.e. 90 dB at 1 m, the nonlinear distortions are below 0,4% above 200 Hz.

An excerpt from the Hobby HiFi review

Conclusion of the magazine Hobby HiFi:

Our kit consists of

  • 2x WF120CU08, Wavecor Mid/Woofer, 8 Ohm, paper / glass fiber, BD, phase plug
  • Mundorf AMTU60W1.1
  • 2x Wavecor Subwoofer SW182BD04, die cast, 8 Ohm
  • 0,5x PE sealing tape, 5x2 mm, 7.5 m
  • 1,5x 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
  • 3x Pan screws 3.5x17 black, torx, 8 pieces
  • Plan for DIY kit

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

  • Audaphon MKP CAP Superior 0.47 μF / 400 Vdc
  • Audaphon MKP CAP Superior 1.0 μF / 400 Vdc
  • Audaphon MKP CAP Superior 6.8 μF / 400 Vdc
  • Audaphon MKP CAP Superior 15 μF / 400 Vdc
  • Audaphon MKT CAP 4.7 μF / 160 Vdc
  • Audaphon MKT CAP 47 μF / 160 Vdc
  • Mundorf, electrolytic capacitor, etched, 390 μF/63 Vdc
  • JB, electrolytic capacitor, bipolar, 47 μF/100 Vdc
  • JB, electrolytic capacitor, bipolar, 82 μF/100 Vdc
  • JB, electrolytic capacitor, bipolar, 220 μF/100 Vdc
  • JB, electrolytic capacitor, bipolar advanced, 8.2 μF / 100 Vdc
  • JB, electrolytic capacitor, bipolar advanced, 10 μF / 100 Vdc
  • 1.0 mm air core coil, 0.27 mH/0.23 Ohm
  • 1.0 mm air core coil, 0.82 mH/0.45 Ohm
  • 0.7 mm air core coil, 0.22 mH/0.34 Ohm
  • 0.7 mm air core coil, 0.82 mH/0.89 Ohm
  • 0.7 mm air core coil, 1.2 mH/1.08 Ohm
  • 0.7 mm air core coil, 15 mH/4,45 Ohm
  • Mundorf H core coil H100, 2.2 mH/0.21 0hm
  • Mundorf H core coil H100, 2.7 mH/0.24 0hm
  • Mundorf H core coil H100, 4.7 mH/0.34 0hm
  • Metal-oxide resistor, 10W 1.0 Ohm (brown-black-gold)
  • Metal-oxide resistor, 10W 6.8 Ohm (blue-grey-gold)
  • Metal-oxide resistor, 10W 12 Ohm (brown-red-black)
  • Metal-oxide resistor, 5W 10 Ohm (brown-black-black)
  • Metal-oxide resistor, 5W 12 Ohm (brown-red-black)

Kit without cabinet, price per speaker   EUR 1158,00 excl. VAT: € 973.11 / $ 1050.96

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 Mundorf AMTU60W1.1 are of type polypropylen (MKP) Mundorf MCAP EVO Öl 450 V.

  • Mundorf MCAP EVO Oil 1 μF / 450 V
  • Mundorf MCAP EVO Oil 6.8 μF / 450 V
  • Mundorf MCAP EVO Oil 15 μF / 450 V
  • Mundorf MCAP EVO Oil 47 μF / 350 V
  • Audaphon MKP CAP Superior 0.47 μF / 400 Vdc
  • Audaphon MKP CAP Superior 4.7 μF / 400 Vdc
  • Audaphon MKP CAP Superior 8.2 μF / 400 Vdc
  • Audaphon MKP CAP Superior 10 μF / 400 Vdc
  • Mundorf, electrolytic capacitor, etched, 390 μF/63 Vdc
  • JB, electrolytic capacitor, bipolar, 82 μF/100 Vdc
  • JB, electrolytic capacitor, bipolar, 220 μF/100 Vdc
  • Mundorf Hepta Coil II45, 0.27 mH/0.20 Ohm
  • Mundorf Hepta Coil II45, 0.82 mH/0.38 Ohm
  • Mundorf baked varnish air core coil BL71, 0.22 mH/0.34 Ohm
  • Mundorf baked varnish air core coil BL71, 0.82 mH/0.89 Ohm
  • Mundorf baked varnish air core coil BL71, 1.2 mH/1.08 Ohm
  • Mundorf baked varnish air core coil BL71, 15 mH/4.45 Ohm
  • Mundorf bs140 core coil 2.2 mH/0.16Ohm
  • Mundorf bs140 core coil 4.7 mH/0.24Ohm
  • Mundorf H core baked varnish coil BH100, 2.7 mH/0.24 0hm
  • MResist Supreme 6.8 Ohm / 20 Watt
  • Mresist Classic 1,0 Ohm / 10 Watt
  • Mresist Classic 12 Ohm / 10 Watt
  • Metal-oxide resistor, 5W 10 Ohm (brown-black-black)
  • Metal-oxide resistor, 5W 12 Ohm (brown-red-black)

Kit with high-end-crossover without cabinet, price per speaker   EUR 1400,00 excl. VAT: € 1176.47 / $ 1270.59

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 3.3 μF / 160 Vdc
  • Audaphon MKT CAP 4.7 μF / 160 Vdc
  • Audaphon MKT CAP 22 μF / 160 Vdc
  • 0.7 mm air core coil, 0.33 mH/0.48 Ohm
  • ceramic resistor 4.7 Ohm/20 Watt
  • ceramic resistor 6.8 Ohm/20 Watt

Price per impedance correction for one speaker, to be mounted on a small wooden board.     EUR 17,40 excl. VAT: € 14.62 / $ 15.79

universal PCB

If you prefer to mount the crossover components on a 240 x 165 mm and a 140 x 102 mm universal PCB instead on wood:
Universal PCB RA240, order no.. str-RA240, price per unit:   EUR 8,60 excl. VAT: € 7.23 / $ 7.81
Universal PCB RA140, order no.. str-RA140, price per unit:   EUR 4,20 excl. VAT: € 3.53 / $ 3.81
We recommend one board of each per kit (two boards for a speaker pair)


Home   Hobby HiFi Overview