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8/12/2019 18s Kit15 Dual
1/15
Building an effective,
high performances, dual 15front loaded subwoofer
Eighteen SoundA division of A.E.B srl
Via dell'Industria 20 - 45025 Cavriago (Reggio Emilia)- Italy
8/12/2019 18s Kit15 Dual
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2x15 subwoofer kit
High performance 2 x 15 inch subwoofer system
Side by side push/pull woofer arrangement to balance themotion mechanical non linearity allowing a significantreduction in distortion
Double driver choice is possible: 15ND930 allows forlightweight box and faster attack sound character. The15LW1500 could be the choice if deeper bass extension andextra power handling capability are required.
15ND930 woofer key features:
Neodymium magnet
3 Edge-wound copper voice coil
Double Demodulating Rings
500W continuous pink noise
15LW1500 woofer key features:
4 interleaved sandwich voice coil
Double Silicon Spider
Double Demodulating Rings
Rubber Surround
1000W continuous pink noise
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15ND930
15LW1500
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Internal view
The enclosure should be made of balticbirch plywood (18mm thickness).
Bolts should be M5 or M6, 35mm ormore length.
M5 or M6 T-Nuts are recommended.
Accurate damping of the cabinetinterior is highly recommended.
An high density dampening material,such as Dacron or other synthetic fibers,is required for better performance.
Handling, rigging and connectors are atusers choice. Its very important thattheir placement should not influence inany way the proper vent functionality.
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Ex
plodedview
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Front view
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Front panel: bolts holes
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Front section
Woofer panel section
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Side section
Inside woofer section
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Side section
Outside woofer section
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Bracing detail
Part G
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Rear panel
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Measurements: 15LW1500
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Measurements: 15ND930
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Equalization settings suggestions
2x15LW15002x15LW1500
High pass:High pass: Butterworth 2nd order @ 25 HzButterworth 2nd order @ 25 Hz
Parametric EQ:Parametric EQ: fofo= 35 Hz= 35 Hz -- gain= 6 dBgain= 6 dB -- Q= 2Q= 2
Low pass:Low pass: LinkwitzLinkwitz/Riley 4th order @ 120 Hz/Riley 4th order @ 120 Hz
2x15ND9302x15ND930
High pass:High pass: Butterworth 2nd order @ 25 HzButterworth 2nd order @ 25 Hz
Parametric EQ:Parametric EQ: fofo= 36 Hz= 36 Hz -- gain= 6 dBgain= 6 dB -- Q= 2Q= 2
Low pass:Low pass: LinkwitzLinkwitz/Riley 4th order @ 120 Hz/Riley 4th order @ 120 Hz