Nimrod   Shelf speaker as in Hobby Hifi 1/2021

Technical data
  • impedance: 4 Ohm
  • sensivity (2,83V/1m): 88 dB
  • size (HxWxD): 606 x 304 x 320 mm
  • frequency range (-8dB): 39 - 30000 Hz
  • crossover frequency(s): 330, 3200 Hz
  • speaker type: bass reflex

Nimrod is a three way compact speaker.

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

The kit is delivered with the following drivers:
- a Visaton G 25 FFL 8 Ohm mit Waveguide WG 148 R tweeter
- a Visaton B 100 6 Ohm mids driver
- a Visaton GF 200 2 x 4 Ohm woofer

The loudspeaker has been developed by Sebastian Bayer and Oliver Kreuer.

The crossover consists of:
- a 2nd order high-pass filter (12 dB per octave slope) for the tweeter.
- a band pass consisting of a 3rd order high pass filter (18 dB per octave slope) and a 2nd order low-pass filter (12 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 nearly linear.

The decay spectrum is nearly perfect.

At medium volume, i.e. 90 dB at 1 m, the nonlinear distortions are below 0,5% above 200 Hz.

Our kit consists of

  • waveguide Visaton WG 148 R
  • Visaton G 25 FFL, 8 Ohm
  • Visaton full range driver B 100 - 6 Ohm
  • Visaton woofer GF 200, 2 x 4 Ohm
  • 0,5x PE sealing tape, 5x2 mm, 7.5 m
  • 2x Damping Sonofil 100 x 35 cm for 20 litres
  • Terminal T105 Au, with brass, gold plated
  • 2m Speaker cable 2x1.5 mm2, transparent
  • 0,5x Pan screws 3.5x17 black, torx, 8 pieces
  • Allen wood screws, black, 5x30 mm, 8 pieces
  • Visaton Countersunk screws 3.5x25, 8 pcs
  • 0,5x Allen wood screws, black, 4x25 mm, 8 pieces
  • Plan for DIY kit

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

  • ClarityCap PWA capacitor 33 μF; / 160 Vdc
  • ClarityCap PWA capacitor 56 μF; / 160 Vdc
  • Jantzen Cross Cap MKP capacitor 0.39 μF; / 400V
  • Audaphon MKP CAP Superior 1.5 μF; / 400 Vdc
  • Audaphon MKT CAP 5.6 μF; / 160 Vdc
  • JB, electrolytic capacitor, bipolar, 100 uF/50 Vdc
  • JB, electrolytic capacitor, bipolar, 68 uF/100 Vdc
  • Mundorf air core coil L50, 3.3 mH/3.13 0hm
  • 1.0 mm air core coil, 1.5 mH/0.63 Ohm
  • 0.7 mm air core coil, 0.47 mH/0.50 Ohm
  • 2x 0.7 mm air core coil, 2.2 mH/1.3 Ohm
  • Mundorf H core coil H100, 3.9 mH/0.3 0hm
  • 4x Metal-oxide resistor, 10W 1.0 Ohm (brown-black-gold)
  • Metal-oxide resistor, 10W 22 Ohm (red-red-black)

Kit without cabinet, price per speaker   EUR 480,00 excl. VAT: € 403.36 / $ 451.76

Original Visaton Nimrod Kit without cabinet, price per speaker   EUR 552,16 excl. VAT: € 464.00 / $ 519.68

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 G 25 FFL 8 Ohm mit Waveguide WG 148 R are of type polypropylen (MKP) Clarity Cap ESA and Mundorf EVO.

  • ClarityCap ESA capacitor 1.5 μF; / 630 Vdc
  • Mundorf MCAP EVO 0.39 μF; / 450 V
  • ClarityCap PWA capacitor 33 μF; / 160 Vdc
  • ClarityCap PWA capacitor 56 μF; / 160 Vdc
  • Audaphon MKP CAP Superior 5.6 μF; / 400 Vdc
  • JB, electrolytic capacitor, bipolar advanced, 68μF / 50 Vdc
  • JB, electrolytic capacitor, bipolar advanced, 100μF / 100 Vdc
  • Mundorf baked varnish air core coil BL71, 0.47 mH/0.57 Ohm
  • 2x Mundorf baked varnish air core coil BL71, 2.2 mH/1.3 Ohm
  • Mundorf baked varnish air core coil BL71, 3.3 mH/1.75 Ohm
  • Mundorf baked varnish air core coil BL140, 1.5 mH/0.38 Ohm
  • Mundorf baked varnish air core coil BL140, 3.9 mH/0.65 Ohm
  • 2x Metal-oxide resistor, 10W 1.0 Ohm (brown-black-gold)
  • 2x Metal-oxide resistor, 10W 1.5 Ohm (brown-green-gold)
  • Metal-oxide resistor, 10W 22 Ohm (red-red-black)

Kit with high-end-crossover without cabinet, price per speaker   EUR 580,00 excl. VAT: € 487.39 / $ 545.88

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 15 μF; / 160 Vdc
  • 0.7 mm air core coil, 0.10 mH/0.27 Ohm
  • ceramic resistor 5.6 Ohm/20 Watt

Price per impedance correction for one speaker, to be mounted on a small wooden board.     EUR 11,40 excl. VAT: € 9.58 / $ 10.73

universal PCB

If you prefer to mount the crossover components on a universal PCB instead on wood
PCB 220x155 mm, order no. I-8805002, price per unit:   EUR 11,80 excl. VAT: € 9.92 / $ 11.11
We recommend one board per kit (2 boards per speaker pair)


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