Little Roy Subwoofer as in Hobby Hifi 3/2015

Technical data

impedance: 4 Ohm
sensivity (2,83V/1m): 87 dB
size (HxWxD): 450 x 250 x 370 mm
frequency range (-8dB): 33 - 200 Hz
crossover frequency(s): Hz
speaker type: passive radiator

Little-Roy is a compact high-end subwoofer. Bernd Timmermanns has developed this woofer. The Little Roy is home to two Wavecor woofers SW178WA01 and two Wavecor passive radiators.

We warmly recommend this loudspeaker.

Our kit with amplifier module consists of

2x Wavecor Subwoofer SW178WA01, 8 Ohm
2x Wavecor PR178WA01 Passive Radiator
Mivoc subwoofer module AM 80 MK II, 80W
2m Speaker cable 2x2.5 mm2, transparent
Pan screws 4x20 black, cross recess, 16 pieces
Plan for DIY kit

Hint: For the amplifier AM 80 MK II a separate cabinet is necessary or the subwoofer cabinet has to be modified.

Kit without cabinet, price per speaker EUR 409,00 excl. VAT: € 343.70 / $ 384.94

Our kit with separate amplifier Reckhorn A-408 consists of

2x Wavecor Subwoofer SW178WA01, 8 Ohm
2x Wavecor PR178WA01 Passive Radiator
Reckhorn Subwoofer Amplifier A-408
Binding Post PK31, gold plated (one pair, red and black)
2m Speaker cable 2x2.5 mm2, transparent
Pan screws 4x20 black, cross recess, 16 pieces
Plan for DIY kit

Kit without cabinet, price per speaker EUR 628,00 excl. VAT: € 527.73 / $ 591.06

Damping 10

If you choose a cut-off frequency above 80 Hz, we recommend additional damping of two or three sheets of damping 10, 970 x 470 mm, adhesive

EUR 18,90

excl. VAT: € 15.88 / $ 17.79

very deep bass

If you want to get a very deep reaching bass, additional weights for the passive radiator are recommended. In this case you should buy washers with outer diameter of about 40 mm with a 6.5 mm hole.

Kits with passive filter

Kit with passive filter with a cut-off frequency of 100 Hz

2x Wavecor Subwoofer SW178WA01, 8 Ohm
2x Wavecor PR178WA01 Passive Radiator
2,5x Audaphon Damping 10, 970 x 470 mm, adhesive
2x Binding Post PK28 I, gold plated (one pair, red and black)
3m Speaker cable 2x2.5 mm2, transparent
Pan screws 4x20 black, cross recess, 16 pieces
Plan for DIY kit

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

2x Mundorf, electrolytic capacitor, etched, 150 uF/63 Vdc
2x Mundorf, electrolytic capacitor, etched, 220 uF/63 Vdc
2x Mundorf, electrolytic capacitor, unetched, 33uF / 70 Vdc
2x Mundorf air core coil L71, 27 mH/6.44 Ohm
2x Mundorf bs125 core coil 22mH/0.75Ohm
2x Metal-oxide resistor, 10W 1.8 Ohm (brown-grey-gold)
2x Metal-oxide resistor, 10W 8.2 Ohm (grey-red-gold)

Kit without cabinet, price per speaker EUR 538,00 excl. VAT: € 452.10 / $ 506.35

Kit with passive high-end crossover with a cut-off frequency of 100 Hz

2x Mundorf, electrolytic capacitor, etched, 220 uF/63 Vdc
2x Mundorf, electrolytic capacitor, unetched, 33uF / 70 Vdc
2x Mundorf, electrolytic capacitor, unetched, 150 uF / 50 Vdc
... ( 68 uF and 82 uF in parallel)
2x Mundorf baked varnish air core coil BL71, 27 mH/6.44 Ohm
2x Mundorf bs140 core coil 22mH/0.56Ohm
2x Metal-oxide resistor, 10W 1.8 Ohm (brown-grey-gold)
2x Metal-oxide resistor, 10W 8.2 Ohm (grey-red-gold)

Kit without cabinet, price per speaker EUR 582,00 excl. VAT: € 489.08 / $ 547.76

Kit with passive filter with a cut-off frequency of 120 Hz

2x Wavecor Subwoofer SW178WA01, 8 Ohm
2x Wavecor PR178WA01 Passive Radiator
2,5x Audaphon Damping 10, 970 x 470 mm, adhesive
2x Binding Post PK28 I, gold plated (one pair, red and black)
3m Speaker cable 2x2.5 mm2, transparent
Pan screws 4x20 black, cross recess, 16 pieces
Plan for DIY kit

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

2x Mundorf, electrolytic capacitor, etched, 122 uF/100 Vdc
... (100 uF and 22 uF in parallel)
2x Mundorf, electrolytic capacitor, etched, 100 uF/100 Vdc
2x Mundorf, electrolytic capacitor, etched, 220 uF/63 Vdc
2x Mundorf, electrolytic capacitor, unetched, 33uF / 70 Vdc
2x Mundorf air core coil L71, 27 mH/6.44 Ohm
2x Mundorf bs125 core coil 18mH/0.66Ohm
2x Metal-oxide resistor, 10W 1.8 Ohm (brown-grey-gold)
2x Metal-oxide resistor, 10W 8.2 Ohm (grey-red-gold)

Kit without cabinet, price per speaker EUR 538,00 excl. VAT: € 452.10 / $ 506.35

Kit with passive high-end crossover with a cut-off frequency of 120 Hz

2x Mundorf, electrolytic capacitor, unetched, 122uF / 50 Vdc
... (100 uF and 22 uF in parallel)
2x Mundorf, electrolytic capacitor, etched, 220 uF/63 Vdc
2x Mundorf, electrolytic capacitor, unetched, 33uF / 70 Vdc
2x Mundorf baked varnish air core coil BL71, 27 mH/6.44 Ohm
2x Mundorf bs140 core coil 18mH/0.54Ohm
2x Metal-oxide resistor, 10W 1.8 Ohm (brown-grey-gold)
2x Metal-oxide resistor, 10W 8.2 Ohm (grey-red-gold)

Kit without cabinet, price per speaker EUR 569,00 excl. VAT: € 478.15 / $ 535.53

Kit with passive filter with a cut-off frequency of 140 Hz

2x Wavecor Subwoofer SW178WA01, 8 Ohm
2x Wavecor PR178WA01 Passive Radiator
2,5x Audaphon Damping 10, 970 x 470 mm, adhesive
2x Binding Post PK28 I, gold plated (one pair, red and black)
3m Speaker cable 2x2.5 mm2, transparent
Pan screws 4x20 black, cross recess, 16 pieces
Plan for DIY kit

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

2x Mundorf, electrolytic capacitor, etched, 100 uF/100 Vdc
2x Mundorf, electrolytic capacitor, etched, 220 uF/63 Vdc
2x Mundorf, electrolytic capacitor, unetched, 33uF / 70 Vdc
2x Mundorf air core coil L71, 27 mH/6.44 Ohm
2x Mundorf bs125 core coil 15mH/0.59Ohm
2x Metal-oxide resistor, 10W 1.8 Ohm (brown-grey-gold)
2x Metal-oxide resistor, 10W 8.2 Ohm (grey-red-gold)

Kit without cabinet, price per speaker EUR 529,00 excl. VAT: € 444.54 / $ 497.88

Kit with passive high-end crossover with a cut-off frequency of 140 Hz

2x Mundorf, electrolytic capacitor, unetched, 100uF / 50 Vdc
2x Mundorf, electrolytic capacitor, etched, 220 uF/63 Vdc
2x Mundorf, electrolytic capacitor, unetched, 33uF / 70 Vdc
2x Mundorf baked varnish air core coil BL71, 27 mH/6.44 Ohm
2x Mundorf bs140 core coil 15mH/0.48Ohm
2x Metal-oxide resistor, 10W 1.8 Ohm (brown-grey-gold)
2x Metal-oxide resistor, 10W 8.2 Ohm (grey-red-gold)

Kit without cabinet, price per speaker EUR 569,00 excl. VAT: € 478.15 / $ 535.53

Kit with passive filter with a cut-off frequency of 170 Hz

2x Wavecor Subwoofer SW178WA01, 8 Ohm
2x Wavecor PR178WA01 Passive Radiator
2,5x Audaphon Damping 10, 970 x 470 mm, adhesive
2x Binding Post PK28 I, gold plated (one pair, red and black)
3m Speaker cable 2x2.5 mm2, transparent
Pan screws 4x20 black, cross recess, 16 pieces
Plan for DIY kit

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

2x Mundorf, electrolytic capacitor, etched, 82 uF/100 Vdc
2x Mundorf, electrolytic capacitor, etched, 220 uF/63 Vdc
2x Mundorf, electrolytic capacitor, unetched, 33uF / 70 Vdc
2x Mundorf air core coil L71, 27 mH/6.44 Ohm
2x Mundorf bs125 core coil 12mH/0.51Ohm
2x Metal-oxide resistor, 10W 1.8 Ohm (brown-grey-gold)
2x Metal-oxide resistor, 10W 8.2 Ohm (grey-red-gold)

Kit without cabinet, price per speaker EUR 529,00 excl. VAT: € 444.54 / $ 497.88

Kit with passive high-end crossover with a cut-off frequency of 170 Hz

2x Mundorf, electrolytic capacitor, unetched, 82uF / 50 Vdc
2x Mundorf, electrolytic capacitor, etched, 220 uF/63 Vdc
2x Mundorf, electrolytic capacitor, unetched, 33uF / 70 Vdc
2x Mundorf baked varnish air core coil BL71, 27 mH/6.44 Ohm
2x Mundorf bs140 core coil 12mH/0.42Ohm
2x Metal-oxide resistor, 10W 1.8 Ohm (brown-grey-gold)
2x Metal-oxide resistor, 10W 8.2 Ohm (grey-red-gold)

Kit without cabinet, price per speaker EUR 557,00 excl. VAT: € 468.07 / $ 524.24

Kit with passive filter with a cut-off frequency of 200 Hz

2x Wavecor Subwoofer SW178WA01, 8 Ohm
2x Wavecor PR178WA01 Passive Radiator
2,5x Audaphon Damping 10, 970 x 470 mm, adhesive
2x Binding Post PK28 I, gold plated (one pair, red and black)
3m Speaker cable 2x2.5 mm2, transparent
Pan screws 4x20 black, cross recess, 16 pieces
Plan for DIY kit

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

2x Mundorf, electrolytic capacitor, etched, 68 uF/100 Vdc
2x Mundorf, electrolytic capacitor, etched, 220 uF/63 Vdc
2x Mundorf, electrolytic capacitor, unetched, 33uF / 70 Vdc
2x Mundorf air core coil L71, 27 mH/6.44 Ohm
2x Mundorf bs125 core coil 10mH/0.46Ohm
2x Metal-oxide resistor, 10W 1.8 Ohm (brown-grey-gold)
2x Metal-oxide resistor, 10W 8.2 Ohm (grey-red-gold)

Kit without cabinet, price per speaker EUR 529,00 excl. VAT: € 444.54 / $ 497.88

Kit with passive high-end crossover with a cut-off frequency of 200 Hz

2x Mundorf, electrolytic capacitor, unetched, 68uF / 50 Vdc
2x Mundorf, electrolytic capacitor, etched, 220 uF/63 Vdc
2x Mundorf, electrolytic capacitor, unetched, 33uF / 70 Vdc
2x Mundorf baked varnish air core coil BL71, 27 mH/6.44 Ohm
2x Mundorf bs140 core coil 10mH/0.38Ohm
2x Metal-oxide resistor, 10W 1.8 Ohm (brown-grey-gold)
2x Metal-oxide resistor, 10W 8.2 Ohm (grey-red-gold)

Kit without cabinet, price per speaker EUR 558,00 excl. VAT: € 468.91 / $ 525.18

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 / $ 4.80
We recommend one board per kit (two boards for a speaker pair)

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