Braun L-710 (Frequenzweichenbausatz)   Shelf speaker as in K+T 3/2021

Technical data
  • impedance: 4 Ohm
  • sensivity (2,83V/1m): 90 dB
  • size (HxWxD): 550 x 310 x 240 mm
  • frequency range (-8dB): 50 - 20000 Hz
  • crossover frequency(s): 550, 4000 Hz
  • speaker type: closed box

Frequenzweichenbausatz für Braun L-710 is a three way compact speaker.

Crossover kit for Braun L-710 speaker.

The kit is delivered with the following drivers:
- a Braun Hochhtöner tweeter
- a Braun Mitteltöner mids driver
- two Braun Tieftöner woofers

The loudspeaker has been developed by Braun.

The crossover consists of:
- a 2nd order high-pass filter (12 dB per octave slope) for the tweeter.
- a band pass consisting of a 2nd order high pass filter (12 dB per octave slope) and a 2nd order low-pass filter (12 dB per octave slope) for the mids-woofer.
- 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 low volume, i.e. 85 dB at 1 m, the nonlinear distortions are below 0,3% above 300 Hz and doesn't exceed 0,7% at 95 dB at 1 m between 300 and 15000 Hz.

Our kit consists of

  • Plan for DIY kit

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

  • 3x Audaphon MKP CAP Superior 4.7 μF / 400 Vdc
  • Audaphon MKP CAP Superior 5.6 μF / 400 Vdc
  • 2x Audaphon MKT CAP 47 μF / 160 Vdc
  • Mundorf air core coil L50, 0.18 mH/0.53 0hm
  • Mundorf air core coil L50, 0.60 mH/1.1 0hm
  • 1.0 mm air core coil, 2.5 mH/0.85 Ohm
  • Mundorf ferrite core coil F50 3.5mH/1.80Ohm
  • Metal-oxide resistor, 10W 2.2 Ohm (red-red-gold)
  • Metal-oxide resistor, 10W 4.7 Ohm (yellow-violet-gold)

Crossover-Kit without drivers and without cabinet, price per speaker   EUR 80,00 excl. VAT: € 67.23 / $ 80.00

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 Braun Hochhtöner are of type polypropylen (MKP) Clarity-Cap CSA 630 V.

  • 2x ClarityCap PWA capacitor 47 μF / 250 Vdc
  • 2x ClarityCap SA capacitor 4.7 μF / 630 Vdc
  • ClarityCap CSA capacitor 5.6 μF / 630 Vdc
  • Audaphon MKP CAP Superior 4.7 μF / 400 Vdc
  • Mundorf baked varnish air core coil BL100, 2.5 mH
  • Mundorf air core coil L50, 0.18 mH/0.53 0hm
  • Mundorf air core coil L50, 0.60 mH/1.1 0hm
  • Mundorf ferrite core coil F50 3.5mH/1.80Ohm
  • Metal-oxide resistor, 10W 2.2 Ohm (red-red-gold)
  • Metal-oxide resistor, 10W 4.7 Ohm (yellow-violet-gold)

Kit of high-end-crossover without drivers, without cabinet, price per speaker   EUR 134,00 excl. VAT: € 112.61 / $ 134.00

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 advanced, 47μF / 100 Vdc
  • 0.7 mm air core coil, 0.68 mH/0.70 Ohm
  • ceramic resistor 4.7 Ohm/20 Watt

Price per impedance correction for one speaker, to be mounted on a small wooden board.     EUR 11,10 excl. VAT: € 9.33 / $ 11.10

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 / $ 5.90
We recommend one board per kit (two boards for a speaker pair)


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