- impedance: 2 x 3 Ohm
- sensivity (2,83V/1m): 88 dB
- size (HxWxD): 750 x 400 x 500 mm
- frequency range (-8dB): 25 - 110 Hz
- crossover frequency(s): 80-110 Hz
- speaker type: bass reflex

DayDream-Sub passiv is a versatile subwoofer which complements the rest of the loudspeakers with a powerful and deep bass.

DayDream-Sub passiv is a bass-reflex cabinet loudspeaker with drivers of Bold North Audio .

The kit is delivered with a Bold North Audio BWF-1002 subwoofer

The loudspeaker has been developed by Bernd Timmermanns.

The crossover consists of:

- 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 perfect.

At medium volume, i.e. 90 dB at 1 m, the nonlinear distortions are below 1% above 50 Hz.

- 2x Bold North Audio BWF-1002
- Damping 30 1100 x 470 mm, adhesive
- PE sealing tape, 5x2 mm, 7.5 m
- 2x Binding Post PK31, gold plated (one pair, red and black)
- 3m Speaker cable 2x2.5 mm2, transparent
- 2x Allen wood screws, black, 5x30 mm, 8 pieces
- Plan for DIY kit

the crossover components (right),

to be mounted on a small wooden board.

- 2x Mundorf, electrolytic capacitor, etched, 220 μF/63 Vdc
- 4x Mundorf, electrolytic capacitor, etched, 330 μF/63 Vdc
- 2x Mundorf bs140 core coil 10 mH/0.38Ohm
- 2x Mundorf H core coil H71, 27 mH/1.68 0hm
- 2x ceramic resistor 3.9 Ohm/20 Watt
- 2x ceramic resistor 4.7 Ohm/20 Watt

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 Bold North Audio BWF-1002 are of type polypropylen (MKP) Mundorf MCAP EVO 250 V.

- 2x Mundorf MCAP EVO 330 μF / 250 V
- 2x Mundorf, electrolytic capacitor, etched, 220 μF/63 Vdc
- 2x Mundorf, electrolytic capacitor, etched, 330 μF/63 Vdc
- 2x Mundorf baked varnish air core coil BL71, 27 mH/6.44 Ohm
- 2x Mundorf vs180 core coil 10 mH/0.23 Ohm
- 2x ceramic resistor 4.7 Ohm/20 Watt

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

- 2x Bold North Audio BWF-1002
- Damping 30 1100 x 470 mm, adhesive
- PE sealing tape, 5x2 mm, 7.5 m
- 2x Binding Post PK31, gold plated (one pair, red and black)
- 3m Speaker cable 2x2.5 mm2, transparent
- 2x Allen wood screws, black, 5x30 mm, 8 pieces
- Plan for DIY kit

the crossover components (right),

to be mounted on a small wooden board.

- 2x Mundorf, electrolytic capacitor, etched, 220 μF/63 Vdc
- 2x Mundorf, electrolytic capacitor, etched, 270 μF/63 Vdc
- 2x Mundorf, electrolytic capacitor, etched, 330 μF/63 Vdc
- 2x Mundorf bs140 core coil 8.2 mH/0.33Ohm
- 2x Mundorf H core coil H71, 27 mH/1.68 0hm
- 2x ceramic resistor 3.9 Ohm/20 Watt
- 2x ceramic resistor 4.7 Ohm/20 Watt

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 Bold North Audio BWF-1002 are of type polypropylen (MKP) Mundorf MCAP EVO 250 V.

- 2x Mundorf MCAP EVO 270 μF / 250 V
- 2x Mundorf, electrolytic capacitor, etched, 220 μF/63 Vdc
- 2x Mundorf, electrolytic capacitor, etched, 330 μF/63 Vdc
- 2x Mundorf baked varnish air core coil BL71, 27 mH/6.44 Ohm
- 2x Mundorf vs180 core coil 8.2 mH/0.21 Ohm
- 2x ceramic resistor 4.7 Ohm/20 Watt

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

- 2x Bold North Audio BWF-1002
- Damping 30 1100 x 470 mm, adhesive
- PE sealing tape, 5x2 mm, 7.5 m
- 2x Binding Post PK31, gold plated (one pair, red and black)
- 3m Speaker cable 2x2.5 mm2, transparent
- 2x Allen wood screws, black, 5x30 mm, 8 pieces
- Plan for DIY kit

the crossover components (right),

to be mounted on a small wooden board.

- 4x Mundorf, electrolytic capacitor, etched, 220 μF/63 Vdc
- 2x Mundorf, electrolytic capacitor, etched, 330 μF/63 Vdc
- 2x Mundorf bs140 core coil 6.8 mH/0.3Ohm
- 2x Mundorf H core coil H71, 27 mH/1.68 0hm
- 2x ceramic resistor 3.9 Ohm/20 Watt
- 2x ceramic resistor 4.7 Ohm/20 Watt

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 Bold North Audio BWF-1002 are of type polypropylen (MKP) Mundorf MCAP EVO 250 V.

- 2x Mundorf MCAP EVO 220 μF / 250 V
- 2x Mundorf, electrolytic capacitor, etched, 220 μF/63 Vdc
- 2x Mundorf, electrolytic capacitor, etched, 330 μF/63 Vdc
- 2x Mundorf baked varnish air core coil BL71, 27 mH/6.44 Ohm
- 2x Mundorf vs180 core coil 6.8 mH/0.21 Ohm
- 2x ceramic resistor 4.7 Ohm/20 Watt

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

- 2x Bold North Audio BWF-1002
- Damping 30 1100 x 470 mm, adhesive
- PE sealing tape, 5x2 mm, 7.5 m
- 2x Binding Post PK31, gold plated (one pair, red and black)
- 3m Speaker cable 2x2.5 mm2, transparent
- 2x Allen wood screws, black, 5x30 mm, 8 pieces
- Plan for DIY kit

the crossover components (right),

to be mounted on a small wooden board.

- 2x Mundorf, electrolytic capacitor, etched, 180 μF/63 Vdc
- 2x Mundorf, electrolytic capacitor, etched, 220 μF/63 Vdc
- 2x Mundorf, electrolytic capacitor, etched, 330 μF/63 Vdc
- 2x Mundorf bs140 core coil 5.6 mH/0.26Ohm
- 2x Mundorf H core coil H71, 27 mH/1.68 0hm
- 2x ceramic resistor 3.9 Ohm/20 Watt
- 2x ceramic resistor 4.7 Ohm/20 Watt

Kit without cabinet, price per speaker

- 2x Mundorf MCAP EVO 180 μF / 250 V
- 2x Mundorf, electrolytic capacitor, etched, 220 μF/63 Vdc
- 2x Mundorf, electrolytic capacitor, etched, 330 μF/63 Vdc
- 2x Mundorf baked varnish air core coil BL71, 27 mH/6.44 Ohm
- 2x Mundorf vs180 core coil 5.6 mH/0.17 Ohm
- 2x ceramic resistor 4.7 Ohm/20 Watt

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

- 2x Bold North Audio BWF-1002
- Damping 30 1100 x 470 mm, adhesive
- PE sealing tape, 5x2 mm, 7.5 m
- 2x Binding Post PK31, gold plated (one pair, red and black)
- 3m Speaker cable 2x2.5 mm2, transparent
- 2x Allen wood screws, black, 5x30 mm, 8 pieces
- Plan for DIY kit

the crossover components (right),

to be mounted on a small wooden board.

- 2x Mundorf, electrolytic capacitor, etched, 150 μF/63 Vdc
- 2x Mundorf, electrolytic capacitor, etched, 220 μF/63 Vdc
- 2x Mundorf, electrolytic capacitor, etched, 330 μF/63 Vdc
- 2x Mundorf bs140 core coil 4.7 mH/0.24Ohm
- 2x Mundorf H core coil H71, 27 mH/1.68 0hm
- 2x ceramic resistor 3.9 Ohm/20 Watt
- 2x ceramic resistor 4.7 Ohm/20 Watt

- 2x Mundorf MCAP EVO 150 μF / 250 V
- 2x Mundorf, electrolytic capacitor, etched, 220 μF/63 Vdc
- 2x Mundorf, electrolytic capacitor, etched, 330 μF/63 Vdc
- 2x Mundorf baked varnish air core coil BL71, 27 mH/6.44 Ohm
- 2x Mundorf vs180 core coil 4.7 mH/0.15 Ohm
- 2x ceramic resistor 4.7 Ohm/20 Watt

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

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 two boards per kit (four boards for a speaker pair)