Lil Buster   Shelf speaker as in Hobby Hifi 2/2022

Technical data
  • impedance: 4 Ohm
  • sensivity (2,83V/1m): 88 dB
  • size (HxWxD): 320 x 170 x 250 mm
  • frequency range (-8dB): 60 - 21000 Hz
  • crossover frequency(s): 4000 Hz
  • speaker type: bass reflex

Lil Buster is a two way compact speaker.

Lil Buster is a bass-reflex cabinet loudspeaker with drivers of Visaton .

The kit is delivered with the following drivers:
- a Visaton SC 5, 8 Ohm tweeter
- a Visaton FR 10, 4 Ohm 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 3rd order low-pass filter (18 dB per octave slope) for the woofer.

The frequency response of this speaker is nearly linear.

The decay spectrum (waterfall spectrum) shows a decelerated swing-out behaviour in the mid-range.

At medium volume, i.e. 90 dB at 1 m, the nonlinear distortions are below 1,1% above 400 Hz.

Our kit consists of

  • Visaton FR 10, 4 Ohm
  • Visaton SC 5, 8 Ohm
  • 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)
  • 1,5m Speaker cable 2x0.75 mm2, transparent
  • 0,5x Pan screws 3.5x17 black, torx, 8 pieces
  • 0,5x Pan screws 4x20 black, torx, 8 pieces
  • Plan for DIY kit

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

  • Audaphon MKT CAP 2.7 μF / 160 Vdc
  • Audaphon MKT CAP 4.7 μF / 160 Vdc
  • JB, electrolytic capacitor, bipolar advanced, 10 μF / 50 Vdc
  • 1.0 mm air core coil, 0.82 mH/0.44 Ohm
  • 1.0 mm air core coil, 0.27 mH/0.23 Ohm
  • 0.7 mm air core coil, 0.27 mH/0.44 Ohm
  • Metal-oxide resistor, 5W 6.8 Ohm (blue-grey-gold)
  • Metal-oxide resistor, 5W 10 Ohm (brown-black-black)

Kit without cabinet, price per speaker   EUR 70,00 excl. VAT: € 58.82 / $ 58.82

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 Visaton SC 5, 8 Ohm are of type polypropylen (MKP) Audaphon 400 V.

  • Audaphon MKP CAP Superior 2.7 μF / 400 Vdc
  • Audaphon MKP CAP Superior 4.7 μF / 400 Vdc
  • Audaphon MKP CAP Superior 10 μF / 400 Vdc
  • Mundorf baked varnish air core coil BL71, 0.27 mH/0.45 Ohm
  • Mundorf baked varnish air core coil BL100, 0.27 mH/0.23 Ohm
  • Mundorf baked varnish air core coil BL100, 0.82 mH/0.45 Ohm
  • Metal-oxide resistor, 5W 6.8 Ohm (blue-grey-gold)
  • Metal-oxide resistor, 5W 10 Ohm (brown-black-black)

Kit with high-end-crossover without cabinet, price per speaker   EUR 92,00 excl. VAT: € 77.31 / $ 77.31

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 4.7 μF / 160 Vdc
  • Audaphon MKT CAP 22 μF / 160 Vdc
  • 0.7 mm air core coil, 0.33 mH/0.48 Ohm
  • Metal-oxide resistor, 10W 5.6 Ohm (green-blue-gold)

Price per impedance correction for one speaker, to be mounted on a small wooden board.     EUR 14,30 excl. VAT: € 12.02 / $ 12.02

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.. str-RA160, price per unit:   EUR 5,90 excl. VAT: € 4.96 / $ 4.96
We recommend a half board per kit (one board for a speaker pair)


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