- impedance: 4 Ohm
- sensivity (2,83V/1m): 83 dB
- size (HxWxD): 308 x 190 x 170 mm
- frequency range (-8dB): 23 - 32000 Hz
- crossover frequency(s): 3000 Hz
- speaker type: bass reflex

LS3/5B (Sub + Sat) is a three way subwoofer and satellite system.

LS3/5B is available with

- closed cabinet

- bass reflex cabinet

- transmissionline cabinet

- subwoofer atellit set

LS3/5B (Sub + Sat) is a subwoofer and satellite system with drivers of Wavecor and Visaton.

The kit is delivered with the following drivers:

- a Wavecor TW022WA05 tweeter

- a Wavecor WF152CU14 mids driver

- a Visaton GF 200 subwoofer

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 band pass consisting of a 2nd order high pass filter (12 dB per octave slope) and a 3rd order low-pass filter (18 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 as shown in the waterfall diagram is exemplary, free of any disturbing resonance.

At medium volume, i.e. 90 dB at 1 m, the nonlinear distortions are below 0,4% above 200 Hz.

- 2x Wavecor silk dome tweeter TW022WA05, 4 Ohm
- 2x WF152CU14, Wavecor Mid/Woofer, 8 Ohm, paper cone, BD, phase plug
- Visaton woofer GF 200, 2 x 4 Ohm
- 2x Damping fleece MT Bondum 800 (30 x 50 x 2 cm)
- 4x Bitumex board 32.5 x 24.5 cm, 5,5 mm
- 0,5x Damping 30 1100 x 470 mm, adhesive
- 4x Binding Post PK31, gold plated (one pair, red and black)
- 5m Speaker cable 2x1.5 mm2, transparent
- 2x Pan screws 3.5x17 black, torx, 8 pieces
- Pan screws 4x20 black, torx, 8 pieces
- Plan for DIY kit

the crossover components (right),

to be mounted on a small wooden board.

- 2x Audaphon MKP CAP Superior 3.3 μF / 400 Vdc
- 2x Audaphon MKP CAP Superior 4.7 μF / 400 Vdc
- 2x Audaphon MKP CAP Superior 6.8 μF / 400 Vdc
- 2x Mundorf, electrolytic capacitor, etched, 100 μF/100 Vdc
- 2x Mundorf, electrolytic capacitor, etched, 220 μF/63 Vdc
- 2x Mundorf, electrolytic capacitor, etched, 560 μF/63 Vdc
- 2x 1.0 mm air core coil, 0.47 mH/0.32 Ohm
- 2x 0.7 mm air core coil, 0.27 mH/0.44 Ohm
- 2x 0.7 mm air core coil, 12 mH/3.9 Ohm
- 2x Mundorf ferrite core coil P50 6.8 mH/2.75Ohm
- 2x Mundorf H core coil H71, 1.8 mH/0.34 0hm
- 2x Mundorf H core coil H100, 3.9 mH/0.3 0hm
- 2x Metal-oxide resistor, 10W 0.82 Ohm 5% (grey-red-silver)
- 2x Metal-oxide resistor, 10W 3.3 Ohm (orange-orange-gold)
- 2x Metal-oxide resistor, 5W 1.2 Ohm (brown-red-gold)

Kit without cabinet, price per speaker

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 Wavecor TW022WA05 are of type polypropylen (MKP) Mundorf EVO ÖL.

- 2x Mundorf MCAP EVO Oil 3.3 μF / 450 V
- 4x Mundorf MCAP EVO Oil 4.7 μF / 450 V
- 2x Mundorf MCAP EVO Oil 6.8 μF / 450 V
- 2x Mundorf, electrolytic capacitor, etched, 100 μF/100 Vdc
- 2x Mundorf, electrolytic capacitor, etched, 220 μF/63 Vdc
- 2x Mundorf, electrolytic capacitor, etched, 560 μF/63 Vdc
- 2x Mundorf baked varnish air core coil BL71, 0.27 mH/0.45 Ohm
- 2x Mundorf baked varnish air core coil BL71, 12 mH/3.9 Ohm
- 2x Mundorf baked varnish air core coil BL140, 0.47 mH/0.19 Ohm
- 2x Mundorf ferrite core coil P50 6.8 mH/2.75Ohm
- 2x Mundorf H core Hepta Coil LH45, 1,8 mH/0.18 Ohm
- 2x Mundorf H core Hepta Coil LH45, 3,9 mH/0.31 Ohm
- 2x Mresist Classic 3,3 Ohm / 10 Watt
- 2x Metal-oxide resistor, 10W 0.82 Ohm 5% (grey-red-silver)
- 2x Metal-oxide resistor, 5W 1.2 Ohm (brown-red-gold)

Kit with high-end-crossover without cabinet, price per speaker

Since core coils always lead to non-linear distortion due to re-magnetization losses (the Hepta Coil LH45), Dr. Peter Strassacker suggests this kit as an alternative to the high-end kit. It does not contain a ferrite core but Mundorf copper foil coils in series to the mid-woofer.

- 2x ClarityCap ESA capacitor 3.3 μF / 250 Vdc
- 4x ClarityCap ESA capacitor 4.7 μF / 250 Vdc
- 2x ClarityCap ESA capacitor 6.8 μF / 250 Vdc
- 2x Mundorf, electrolytic capacitor, etched, 100 μF/100 Vdc
- 2x Mundorf, electrolytic capacitor, etched, 220 μF/63 Vdc
- 2x Mundorf, electrolytic capacitor, etched, 560 μF/63 Vdc
- 2x Mundorf copper foil coil CFC16-0.47 mH/0.22Ohm
- 2x Mundorf copper foil coil CFC14-1.8 mH/0.32Ohm
- 2x Mundorf baked varnish air core coil BL71, 0.27 mH/0.45 Ohm
- 2x Mundorf baked varnish air core coil BL71, 6.8 mH/2.68 Ohm
- 2x Mundorf baked varnish air core coil BL71, 12 mH/3.9 Ohm
- 2x Mundorf H core Hepta Coil LH45, 3,9 mH/0.31 Ohm
- 2x Metal-oxide resistor, 10W 0.82 Ohm 5% (grey-red-silver)
- 2x Metal-oxide resistor, 10W 3.3 Ohm (orange-orange-gold)
- 2x Metal-oxide resistor, 5W 1.2 Ohm (brown-red-gold)

Kit with high-end2-crossover without cabinet, price per speaker

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).

- 2x Audaphon MKT CAP 22 μF / 160 Vdc
- 2x 0.7 mm air core coil, 0.33 mH/0.48 Ohm
- 2x ceramic resistor 8.2 Ohm/20 Watt

Price per impedance correction for one speaker, to be mounted on a small wooden board.

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:

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