HiFi-PA 2x8/2   Floorstanding as in Hobby Hifi 3/2019

Technical data
  • impedance: 6 Ohm
  • sensivity (2,83V/1m): 91,5 dB
  • size (HxWxD): 1150 x 260 x 380 mm
  • frequency range (-8dB): 38 - 20000 Hz
  • crossover frequency(s): 2800 Hz
  • speaker type: bass reflex

HiFi-PA 2x8/2 is a two way floorstanding speaker.

HiFi-PA 2x8/2 is a bass-reflex cabinet loudspeaker with drivers of Celestion and Monacor.

The kit is delivered with the following drivers:
- a Monacor horn MRH-180 with Celestion CDX1-1747 driver
- two Monacor SP-8/150 PRO woofers

The loudspeaker has been developed by Bernd Timmermanns.

The crossover consists of:
- a 2nd order high-pass filter (12 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 is perfect.

At medium volume, i.e. 90 dB at 1 m, the nonlinear distortions are below 0,6% above 100 Hz.

Our kit consists of

  • 2x Monacor SP-8/150 PRO
  • mid/high frequency horn MRH-180
  • Celestion CDX1-1747, 1.75 inch-Kapton-Driver
  • Bass reflex tube HP100, 100x200 mm, black
  • 0,5x PE sealing tape, 5x2 mm, 7.5 m
  • 2x Damping Sonofil 100 x 35 cm for 20 litres
  • Audaphon Damping 10, 970 x 470 mm, adhesive
  • Binding Post PK31, gold plated (one pair, red and black)
  • 3m Speaker cable 2x2.5 mm2, transparent
  • 2,5x Pan screws 4x20 black, torx, 8 pieces
  • Plan for DIY kit

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

  • Audaphon MKP CAP Superior 1.5 uF / 400 Vdc
  • Audaphon MKP CAP Superior 4.7 uF / 400 Vdc
  • Audaphon MKP CAP Superior 8.2 uF / 400 Vdc
  • Mundorf air core coil L140, 0.47 mH/0.19 Ohm
  • Mundorf air core coil L140, 1.0 mH/0.30 Ohm
  • 0.7 mm air core coil, 0.68 mH/0.70 Ohm
  • 2x Metal-oxide resistor, 10W 4.7 Ohm (yellow-violet-gold)
  • Metal-oxide resistor, 10W 6.8 Ohm (blue-grey-gold)
  • Metal-oxide resistor, 5W 1.0 Ohm (brown-black-gold)

Kit without cabinet, price per speaker   EUR 399,00 excl. VAT: € 335.29 / $ 375.53

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 Monacor MRH-180 mit Celestion CDX1-1747 are of type polypropylen (MKP) Mundorf EVO Öl.

The kit with high-end crossover also has a higher load capacity, as the coils in series with the two woofers have a cross-section of 1.8 mm2 instead of only 1.4 mm2.

Kit with high-end-crossover without cabinet, price per speaker   EUR 430,00 excl. VAT: € 361.34 / $ 404.71

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).


Price per impedance correction for one speaker, to be mounted on a small wooden board.     EUR 7,60 excl. VAT: € 6.39 / $ 7.15

universal PCB

If you prefer to mount the crossover components on a 140 x 102mm universal PCB instead on wood:
Universal PCB RA140, order no.. I-2765, price per unit:   EUR 3,70 excl. VAT: € 3.11 / $ 3.48
We recommend two boards per kit (four boards for a speaker pair)


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