Retro-HiFi-PA   Floorstanding as in Hobby Hifi 3/2022

Technical data
  • impedance: 4 Ohm
  • sensivity (2,83V/1m): 96,5 dB
  • size (HxWxD): 950 x 450 x 436,5 mm
  • frequency range (-8dB): 40 - 20000 Hz
  • crossover frequency(s): 2100 Hz
  • speaker type: bass reflex

Retro-HiFi-PA is a two way floorstanding speaker.

Retro-HiFi-PA is a bass-reflex cabinet loudspeaker with drivers of Redcatt and LaVoce.

The kit is delivered with the following drivers:
- a Redcatt 140FCD-087 + LaVoce HD1004 horn with driver
- a Redcatt 121FIND-233 woofer

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 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 nearly perfect.

At medium volume, i.e. 90 dB at 1 m, the nonlinear distortions are below 0,33% above 100 Hz.

Our kit consists of

  • Redcatt 121FIND-233
  • Redcatt 140FCD-087
  • LaVoce HD1004
  • 0,5x Damping 30 1100 x 470 mm, adhesive
  • 0,5x PE sealing tape, 5x2 mm, 7.5 m
  • 1,5x Damping Sonofil 100 x 35 cm for 20 litres
  • Binding Post PK31, gold plated (one pair, red and black)
  • 3m Speaker cable 2x1.5 mm2, transparent
  • Allen wood screws, black, 5x30 mm, 8 pieces
  • 0,5x Visaton Countersunk screws 3.5x25, 8 pcs
  • Plan for DIY kit

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

  • Audaphon MKT CAP 2.2 μF / 160 Vdc
  • Audaphon MKT CAP 6.8 μF / 160 Vdc
  • Audaphon MKT CAP 22 μF / 160 Vdc
  • 0.7 mm air core coil, 0.56 mH/0.55 Ohm
  • Mundorf ferrite core coil P125 1.8 mH/0.31Ohm
  • ceramic resistor 68 Ohm/10 Watt
  • Metal-oxide resistor, 10W 0.68 Ohm 5% (blue-grey-silver)

Kit without cabinet, price per speaker   EUR 227,00 excl. VAT: € 190.76 / $ 190.76

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 Redcatt 140FCD-087 + LaVoce HD1004 are of type polypropylen (MKP) Audaphon MKP CAP Superior 400 V.

  • 2x Audaphon MKP CAP Superior 2.2 μF / 400 Vdc
  • Audaphon MKP CAP Superior 6.8 μF / 400 Vdc
  • Audaphon MKP CAP Superior 22 μF / 400 Vdc
  • JB, electrolytic capacitor, bipolar, 220 μF/50 Vdc
  • Mundorf baked varnish air core coil BL71, 0.56 mH/0.64 Ohm
  • Mundorf baked varnish ferrite core coil BP125 1.8mH/0.31Ohm
  • Mundorf ferrite core coil P71 6.8 mH/1.65Ohm
  • Mundorf ferrite core coil P71 12 mH/2.55Ohm
  • Metal-oxide resistor, 10W 1.5 Ohm (brown-green-gold)
  • Metal-oxide resistor, 10W 2.7 Ohm (red-purple-gold)
  • Metal-oxide resistor, 10W 27 Ohm (red-purple-black)
  • Metal-oxide resistor, 5W 15 Ohm (brown-green-black)

Kit with high-end-crossover without cabinet, price per speaker   EUR 304,00 excl. VAT: € 255.46 / $ 255.46

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).

  • JB, electrolytic capacitor, bipolar, 68 μF/100 Vdc
  • 0.7 mm air core coil, 0.068 mH
  • ceramic resistor 4.7 Ohm/20 Watt

Price per impedance correction for one speaker, to be mounted on a small wooden board.     EUR 10,50 excl. VAT: € 8.82 / $ 8.82

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 one board per kit (two boards for a speaker pair)


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