Aluminata 130/4KE is a 2 1/2 way floorstanding speaker with two mid-woofer which are supported in the bass by two additional woofers. Aluminata 130/4K has been developed by Bernd Timmermanns.
In Aluminata 130/4KE four mid-woofers Visaton AL 130 and one ceramics tweeter KE 25 SC are employed.
The crossover consists of a 4th order high-pass filter (24 dB per octave slope) for the tweeter. The mid-woofers are connected to a 3rd order low-pass filter (18 dB per octave slope) with a parallel RCL. And the two woofers do their work in parallel to the mid-woofers, but they start at lower frequencies and are connected to a 2nd order low-pass filter (12 dB per octave slope).
Between 40 Hz and 15 kHz, the frequency response of this loudspeaker is nearly flat on axis. The decay spectrum is nearly perfect below 20 kHz. At low volume, i.e. 90 dB at 1 m, the nonlinear distortions are below 1% above 100 Hz.
the crossover components (right),
to be mounted on a small wooden board.
Kit without cabinet, price per speaker EUR 963,00 excl. VAT: € 809.24 / $ 963.00
Hint: Instead of 0.5 m2 Damping 30 we provide 0.9 m2 Damping 10
The high-end kit comes with foil capacitor instead of the unetched type. In series to the tweeter Mundorf MCAP EVO Silver Gold oil capacitors are employed. The inductances are baked varnished coils or Mundorf copper foil 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.
Kit with high-end-crossover without cabinet, price per speaker EUR 1220,00 excl. VAT: € 1025.21 / $ 1220.00
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).
If you prefer to mount the crossover components on a 240 x 165 mm universal PCB instead on wood:
Universal PCB RA240, order no.. str-RA240, price per unit: EUR 8,60 excl. VAT: € 7.23 / $ 8.60
We recommend one board per kit (two boards for a speaker pair)
Hobby HiFi Overview