ScaMo15, Shelf speaker   as in Hobby Hifi 2/2014

Technical data
- impedance: 8 Ohm
- sensivity (2,83V/1m): 85 dB
- size (HxWxD): 360 x 180 x 270 mm
- frequency range (-8dB): 48 - 40000 Hz
- crossover frequency(s): 2000 Hz
- speaker type: bass reflex

ScaMo 15 is a monitor with scan speak chassis. The woofer is a Scan Speak driver of the Discovery series.

Bernd Timmermanns used a simple housing for ScaMo 15 which is easy to rebuild. The crossover consists of a second-order high-pass filter and a second-order low-pass filter. A resistor in series to the tweeter adjusts the level of the tweeter to the level of the woofer. A resistor divider was not chosen because the tweeters 4 Ohms impedance should be adapted to 8 Ohms.

In Parallel to the resistor a small capacitor is used, which raises the highest frequencies, so that the speaker reaches almost 40 000 Hz in frequency response.

The frequency response of the speaker-system is very flat; the decay spectrum is excellent and the non-linear distortions remain almost consistently below 0.3% at 90 dB SPL. These are excellent characteristics.
 

   

Our kit consists of

  • ScanSpeak ring radiator R2604/832000
  • ScanSpeak Woofer/midrange 15W-8434G00
  • 0,5x Damping fleece MT Bondum 800 (30 x 50 x 2 cm)
  • PE sealing tape, 5x2 mm
  • 2x bass reflex tube HP50, 50x143mm, black
  • 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
  • Pan screws 4x20 black, 12 pieces
  • Plan for DIY kit

the crossover components (right),
to be mounted on a piece of wood

  • Audaphon MKP CAP Superior 0.68 uF / 400 Vdc
  • Audaphon MKP CAP Superior 5.6 uF / 400 Vdc
  • Mundorf, electrolytic capacitor, unetched, 10 uF / 70 Vdc
  • Mundorf air core coil L71, 0.47 mH/0.57 Ohm
  • Mundorf air core coil L140, 2.2 mH/0.46 Ohm
  • Metal-oxide resistor, 5W 4.7 Ohm (yellow-violet-gold)

Kit without cabinet, price per speaker EUR 150,00 excl. VAT: € 126.05 / $ 146.22

Kit with high-end crossover

The kit with high-end crossover contains four Mundorf baked varnish air core coils and in series to the tweeter Mundorf MCAP EVO Oil capacitors.

  • Mundorf MCAP EVO Oil 0.68 uF / 450 V
  • Mundorf MCAP EVO Oil 5.6 uF / 450 V
  • Mundorf MCAP 10 uF / 250 Vdc
  • Mundorf baked varnish air core coil BL71, 0.47 mH/0.57 Ohm
  • Mundorf baked varnish air core coil BL140, 2.2 mH/0.46 Ohm
  • Metal-oxide resistor, 5W 4.7 Ohm (yellow-violet-gold)

Kit with high-end-crossover without cabinet, price per speaker EUR 173,00 excl. VAT: € 145.38 / $ 168.64

Kit with high-end crossover no 2

High-end crossover no.2 contains Rike Oil capacitors produced in Germany. In series to the woofer a Mundorf copper foil coil is used.

  • Rike S-Cap 0.68 uF / 630 Vdc
  • Rike copper polypropylen capacitor Q-Cap-PP 5,6 uF
  • ClarityCap PWA capacitor 10 uF / 400 Vdc
  • Mundorf copper foil coil CFC16-2.2mH/0.54Ohm
  • Mundorf baked varnish air core coil BL71, 0.47 mH/0.57 Ohm
  • Metal-oxide resistor, 5W 4.7 Ohm (yellow-violet-gold)

Kit with high-end-crossover no.2 without cabinet, price per speaker EUR 460,00 excl. VAT: € 386.55 / $ 448.40

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 22 uF / 160 Vdc
  • Audaphon air core coil L7, 0.68 mH/0.70 Ohm
  • 2x Metal-oxide resistor, 10W 3.9 Ohm (orange-white-gold)


Price per impedance correction for one speaker, to be mounted on a small wooden board.   EUR 14,20 excl. VAT: € 11.93 / $ 13.84

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.. I-2766, price per unit: EUR 5,10 excl. VAT: € 4.29 / $ 4.97
We recommend two boards per kit (four boards for a speaker pair)
 


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