Horn Driver   Woofer   Coaxial speaker   no longer sold  

Eighteen Sound

Eighteen Sound is a designer and manufacturer of high quality professional audio loudspeakers, with advanced development and manufacturing technologies, and located in Reggio Emilia, Italy.


 

Coaxial speaker


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recommended cabinet 1:
closed cabinet with 6,7 L volume
from 168/106 Hz (-3dB/-8dB)

recommended cabinet 2:
16 L volume bass reflex cabinet
with HP100 reflex tube, 13 cm long.
from 100/75 Hz (-3dB/-8dB).

12 CX 800       order no. 18s-12cx800       - not available
30 cm coax driver with paper cone. The basket is made of die-cast.
  • power handling (continuous/programme) = 400/600 W
  • frequency range = 60-20000 Hz
  • resonance frequency fs = 53 Hz
  • impedance R = 8 Ohm
  • sound pressure level SPL = 97,5 dB (2,83V; 1m)
  • DC resistance Re = 5,8 Ohm
  • force factor BL = 18,5 N/A
  • voice coil inductance L = 1,3 mH
  • effective piston radiating area Sd = 530 cm2
  • effective mechanical mass incl. air load mms = 48 g
  • equivalent volume of compliance Vas = 73 l
  • total Q factor Qts = 0,25 (Qms=4, Qes=0,27)
  • voice coil diameter = 75 mm
  • maximum peak linear excursion vibration xlin = +/- 6,25 mm
  • mounting diameter d = 282 mm
  • overall diameter d = 315 mm
  • mounting depth (not countersunk) t = 209 mm
  • mass m = 11,4 kg
PDF data sheet

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recommended cabinet 1:
closed cabinet with 18 L volume
from 128/81 Hz (-3dB/-8dB)

recommended cabinet 2:
54 L volume bass reflex cabinet
with 2x HP100 reflex tube, 10 cm long.
from 71/54 Hz (-3dB/-8dB).

15 CX 1000       order no. 18s-15cx1000       EUR 620,70 excl. VAT: € 521.60 / $ 589.40
37 cm coax driver with paper cone. The basket is made of die-cast.
  • power handling (continuous/programme) = 850/1000 W
  • frequency range = 70-20000 Hz
  • resonance frequency fs = 48 Hz
  • impedance R = 8 Ohm
  • sound pressure level SPL = 95 dB (2,83V; 1m)
  • DC resistance Re = 5,5 Ohm
  • force factor BL = 21 N/A
  • voice coil inductance L = 1,5 mH
  • effective piston radiating area Sd = 855 cm2
  • effective mechanical mass incl. air load mms = 85 g
  • equivalent volume of compliance Vas = 132,5 l
  • total Q factor Qts = 0,3 (Qms=6, Qes=0,32)
  • voice coil diameter = 100 mm
  • maximum peak linear excursion vibration xlin = +/- 6 mm
  • mounting diameter d = 353 mm
  • overall diameter d = 387 mm
  • mounting depth (not countersunk) t = 218,4 mm
  • mass m = 14,4 kg
PDF data sheet

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recommended cabinet 1:
closed cabinet with 6,4 L volume
from 183/116 Hz (-3dB/-8dB)

recommended cabinet 2:
16 L volume bass reflex cabinet
with 2x HP100 reflex tube, 22 cm long.
from 107/81 Hz (-3dB/-8dB).

12 NCX 750       order no. 18s-12ncx750       EUR 584,00 excl. VAT: € 490.76 / $ 554.55
30 cm coax driver with paper cone. The basket is made of die-cast. The magnet system is based on Neodymium technology.
  • power handling (continuous/programme) = 400/800 W
  • frequency range = 60-20000 Hz
  • resonance frequency fs = 60 Hz
  • impedance R = 8 Ohm
  • sound pressure level SPL = 96,5 dB (2,83V; 1m)
  • DC resistance Re = 5,2 Ohm
  • force factor BL = 18 N/A
  • voice coil inductance L = 0,65 mH
  • effective piston radiating area Sd = 531 cm2
  • effective mechanical mass incl. air load mms = 43 g
  • equivalent volume of compliance Vas = 64 l
  • total Q factor Qts = 0,26 (Qms=6,3, Qes=0,27)
  • voice coil diameter = 75 mm
  • maximum peak linear excursion vibration xlin = +/- 5,5 mm
  • mounting diameter d = 280 mm
  • overall diameter d = 310 mm
  • mounting depth (not countersunk) t = 148 mm
PDF data sheet

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recommended cabinet 1:
closed cabinet with 36 L volume
from 104/66 Hz (-3dB/-8dB)

recommended cabinet 2:
126 L volume bass reflex cabinet
with 2x HP100 reflex tube, 3 cm long.
from 53/42 Hz (-3dB/-8dB).

15 NCX 750       order no. 18s-15ncx750       EUR 614,00 excl. VAT: € 515.97 / $ 583.04
38 cm coax driver with paper cone. The basket is made of die-cast. The magnet system is based on Neodymium technology.
  • power handling (continuous/programme) = 400/800 W
  • frequency range = 55-20000 Hz
  • resonance frequency fs = 48 Hz
  • impedance R = 8 Ohm
  • sound pressure level SPL = 98 dB (2,83V; 1m)
  • DC resistance Re = 5,3 Ohm
  • force factor BL = 18 N/A
  • voice coil inductance L = 0,65 mH
  • effective piston radiating area Sd = 881 cm2
  • effective mechanical mass incl. air load mms = 74,5 g
  • equivalent volume of compliance Vas = 158 l
  • total Q factor Qts = 0,37 (Qms=7,2, Qes=0,39)
  • voice coil diameter = 75 mm
  • maximum peak linear excursion vibration xlin = +/- 5,5 mm
  • mounting diameter d = 360 mm
  • overall diameter d = 393 mm
  • mounting depth (not countersunk) t = 185 mm
PDF data sheet

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Horn Driver   Woofer   Coaxial speaker   no longer sold  
The cabinet volume calculations are executed considering an external resistance of 0.3 Ohm. We are using, if no other data is known or available, the information supplied by the manufacturer.

Please note: the frequency response doesn't say much about the cut-off frequency inside the cabinet! Therefore, we mostly give you 2 examples with dimensioning considerations and an indication, how low the loudspeaker will reproduce.

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© Copyright 2018 Iris Strassacker; All rights reserved. - errors and omissions excepted