HiFi-PA 10/2 (2025)   Shelf speaker as in Hobby Hifi 2-3/2025

Technical data
  • impedance: 6 Ohm
  • sensivity (2,83V/1m): 88 dB
  • size (HxWxD): 650 x 360 x 300 mm
  • frequency range (-8dB): 40 - 20000 Hz
  • crossover frequency(s): 2000 Hz
  • speaker type: bass reflex

HiFi-PA 10/2 is a two way compact speaker.

HiFi-PA 10/2 is a bass-reflex cabinet loudspeaker with drivers of Celestion and Wavecor.

The kit is delivered with the following drivers:
- a Celestion CDX1-1747 + Celestion H1-7050 horn with driver
- a Wavecor WF259PA01 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 3rd order low-pass filter (18 dB per octave slope) for the woofer.

The frequency response of this speaker is perfectly linear.

The decay spectrum is nearly perfect.

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

An excerpt from the Hobby HiFi review

Conclusion of the magazine Hobby HiFi:

Our kit consists of

  • Wavecor WF259PA01, 8 Ohm, professional woofer
  • Celestion H1-7050 NoBell Horn, Aluminium, 70x50 (T5134)
  • Celestion CDX1-1747, 1.75 inch-Kapton-Driver
  • Damping fleece MT Bondum 800 (30 x 50 x 2 cm)
  • Damping Sonofil 100 x 35 cm for 20 litres
  • 0,5x Audaphon Damping 10, 970 x 470 mm, adhesive
  • Binding Post PK28 I, gold plated (one pair, red and black)
  • 2m Speaker cable 2x2.5 mm2, transparent
  • 2x 1 piece hexagon nuts M6, DIN 934 zinc-plated (934VZ006)
  • 2x 1 piece spring ring 6,1 mm, DIN 127-A zinc-plated (127-AVZ0061)
  • 2x SuM-913BL06X30-1
  • 1,5x Allen wood screws, black, 5x30 mm, 8 pieces
  • Plan for DIY kit

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

  • ClarityCap PWA capacitor 10 μF / 250 Vdc
  • ClarityCap PWA capacitor 1.5 μF / 400 Vdc
  • ClarityCap PWA capacitor 4.7 μF / 400 Vdc
  • Mundorf MKP capacitor 22 μF / 250 V
  • Audaphon MKT CAP 1.5 μF / 160 Vdc
  • MKT capacitor 4.7 μF / 250Vdc
  • Mundorf, electrolytic capacitor, etched, 270 μF/63 Vdc
  • Mundorf baked varnish air core coil BL71, 10 mH/3.62 Ohm
  • Mundorf baked varnish air core coil BL100, 0.68 mH/0.39 Ohm
  • Mundorf baked varnish air core coil BL140, 1.5 mH/0.38 Ohm
  • Mundorf vs140 core coil 4.7 mH/0.24Ohm
  • Mundorf H core baked varnish coil BH71, 10 mH/0.87 0hm
  • Metal-oxide resistor, 10W 3.3 Ohm (orange-orange-gold)
  • Metal-oxide resistor, 10W 3.9 Ohm (orange-white-gold)
  • Metal-oxide resistor, 10W 5.6 Ohm (green-blue-gold)
  • Metal-oxide resistor, 10W 8.2 Ohm (grey-red-gold)
  • Metal-oxide resistor, 10W 15 Ohm (brown-green-black)

Kit without cabinet, price per speaker   EUR 955,00 excl. VAT: € 802.52 / $ 930.92

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 Celestion CDX1-1747 + Celestion H1-7050 are of type polypropylen (MKP) Clarity-Cap PWA 160.

  • Mundorf Mcap Supreme EVO Oil 1,5 μF / 1000V
  • Mundorf Mcap Supreme EVO Oil 4,7 μF / 800V
  • ClarityCap PWA capacitor 10 μF / 250 Vdc
  • Mundorf MKP capacitor 22 μF / 250 V
  • Audaphon MKT CAP 1.5 μF / 160 Vdc
  • Mundorf, electrolytic capacitor, etched, 270 μF/63 Vdc
  • Mundorf copper foil coil CFC14-0.68 mH/0.20Ohm
  • Mundorf copper foil coil CFC14-1.5 mH/0.29Ohm
  • Mundorf baked varnish air core coil BL71, 10 mH/3.62 Ohm
  • Mundorf H core baked varnish coil BH71, 10 mH/0.87 0hm
  • Mundorf CFS14 coil, 4.7 mH/0.23 Ohm
  • MResist Supreme 8.2 Ohm / 20 Watt
  • Mresist Classic 3,9 Ohm / 10 Watt
  • Mresist Classic 15 Ohm / 10 Watt
  • Metal-oxide resistor, 10W 3.3 Ohm (orange-orange-gold)
  • Metal-oxide resistor, 10W 5.6 Ohm (green-blue-gold)

Kit with high-end-crossover without cabinet, price per speaker   EUR 1182,00 excl. VAT: € 993.28 / $ 1152.20

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 47 μF / 160 Vdc
  • Mundorf baked varnish air core coil BL71, 0.47 mH/0.57 Ohm
  • ceramic resistor 10 Ohm/20 Watt

Price per impedance correction for one speaker, to be mounted on a small wooden board.     EUR 26,22 excl. VAT: € 22.03 / $ 25.56

universal PCB

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 / $ 8.38
We recommend one board per kit (two boards for a speaker pair)


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