DayDream   Floorstanding as in Hobby Hifi 4/2020

Technical data
  • impedance: 4 Ohm
  • sensivity (2,83V/1m): 87 dB
  • size (HxWxD): 850 x 180 x 230 mm
  • frequency range (-8dB): 39 - 40000 Hz
  • crossover frequency(s): 2500 Hz
  • speaker type: bass reflex

DayDream is a two way floorstanding speaker.

DayDream is a bass-reflex cabinet loudspeaker with drivers of Dayton Audio .

The kit is delivered with the following drivers:
- a Dayton Audio NHP25Ti-4 tweeter
- a Dayton Audio RS150-4 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 2nd order low-pass filter (12 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 1,2% above 200 Hz.

An excerpt from the Hobby HiFi review

Conclusion of the magazine Hobby HiFi:

Our kit consists of

  • Dayton Audio RS150-4
  • Dayton Audio NHP25Ti-4
  • 2x Bass reflex tube HP50, 50x143mm, black
  • 0,5x Damping fleece MT Bondum 800 (30 x 50 x 2 cm)
  • 0,5x PE sealing tape, 5x2 mm, 7.5 m
  • 0,5x Damping Sonofil 100 x 35 cm for 20 litres
  • Binding Post PK31, gold plated (one pair, red and black)
  • 2m Speaker cable 2x1.5 mm2, transparent
  • 1,5x Pan screws 3.5x17 black, torx, 8 pieces
  • Plan for DIY kit

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

  • Audaphon MKP CAP Superior 3.9 μF; / 400 Vdc
  • Audaphon MKP CAP Superior 10 μF; / 400 Vdc
  • Audaphon MKP CAP Superior 12 μF; / 400 Vdc
  • 1.0 mm air core coil, 1.0 mH/0.49 Ohm
  • 0.7 mm air core coil, 0.22 mH/0.34 Ohm
  • Metal-oxide resistor, 10W 3.3 Ohm (orange-orange-gold)

Kit without cabinet, price per speaker   EUR 149,00 excl. VAT: € 128.45 / $ 151.57

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 Dayton Audio NHP25Ti-4 are of type polypropylen (MKP) Mundorf MCAP EVO Öl 450 V.

  • Mundorf MCAP EVO Oil 3.9 μF; / 450 V
  • Mundorf MCAP EVO Oil 10 μF; / 450 V
  • Audaphon MKP CAP Superior 12 μF; / 400 Vdc
  • Mundorf baked varnish air core coil BL71, 0.22 mH/0.34 Ohm
  • Mundorf baked varnish air core coil BL140, 1.0 mH/0.30 Ohm
  • Metal-oxide resistor, 10W 3.3 Ohm (orange-orange-gold)

Kit with high-end-crossover without cabinet, price per speaker   EUR 222,00 excl. VAT: € 191.38 / $ 225.83

Optional high frequency series RLC resonance circuit

Optional high frequency series RLC resonance circuit to reduce the tweeter resonance around 21 KHz

  • Audaphon MKP CAP Superior 1.0 μF; / 400 Vdc
  • 0.7 mm air core coil, 0.056 mH
  • Metal-oxide resistor, 5W 1.0 Ohm (brown-black-gold)

Price per series RLC resonance circuit for one speaker.     EUR 6,37 excl. VAT: € 5.49 / $ 6.48

Optional high frequency series RLC resonance circuit High-End

Optional high frequency series RLC resonance circuit to reduce the tweeter resonance around 21 KHz

  • Audaphon MKP CAP Superior 1.0 μF; / 400 Vdc
  • Mundorf baked varnish air core coil BL71, 0.056 mH/0.18 Ohm
  • Metal-oxide resistor, 5W 1.0 Ohm (brown-black-gold)

Price per series RLC resonance circuit for one speaker.     EUR 7,71 excl. VAT: € 6.65 / $ 7.84

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, 33μF / 50 Vdc
  • 0.7 mm air core coil, 0.18 mH/0.36 Ohm
  • ceramic resistor 4.7 Ohm/20 Watt

Price per impedance correction for one speaker, to be mounted on a small wooden board.     EUR 8,85 excl. VAT: € 7.63 / $ 9.00

universal PCB

If you prefer to mount the crossover components on a 140 x 102 mm universal PCB instead on wood:
Universal PCB RA140, order no.. I-2765, price per unit:   EUR 3,61 excl. VAT: € 3.11 / $ 3.67
We recommend one board per kit (two boards for a speaker pair)


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