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18SOUND 15NCX1000

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18SOUND (Eighteen Sound) 15NCX1000 — 15" / 15 inch Coaxial Driver · Coax / Coaxial Driver · Neodymium
4"/4" voice coils · 8 Ω
Part no.: 42A-CHS-KO-18S-0010

1,099.00 € 1099.0 EUR 1,099.00 €

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18SOUND 15NCX1000 — 15" · Coaxial Driver

600 W AES · 96 dB Sensitivity · Frequency range 44 Hz – 3600 Hz

Technical data

  • Diameter: 15 "
  • Voice coil: 4 "
  • Power handling: 600 W AES
  • Sensitivity: 96 dB
  • Impedance: 8 Ω
  • Weight: 8.5 kg
  • Mounting depth: 197 mm
  • Frequency range: 44 – 3600 Hz
  • Cone material: Titanium
  • Coverage angle: 90 °
  • Rec. crossover: 1.0 kHz

Datasheet (PDF) · Manufacturer page

Series: NCX · Part no.: 42A-CHS-KO-18S-0010

18Sound 15NCX1000: 15" coax with 4" voice coils, 600 W and 96 dB for compact tops

The 15NCX1000 is the coaxial driver in 18Sound's NCX series with the heaviest motor layout: woofer and high-frequency section each run on a 4" voice coil, and the motor is a neodymium magnet system. The result is a 15" coax rated at 600 W AES, 96 dB sensitivity and a usable range of 44 Hz to 3600 Hz for the low-frequency section. The tweeter radiates through a titanium diaphragm into a 90° conical horn.

Among the 15" coaxials in the shop, the 15NCX1000 stands for the pairing of a large HF coil with a tightly controlled woofer motor. A BL product of 27.5 Tm against a moving mass of 110 g yields Qts 0.31 and, for a 15", a small Vas of 75 l. That means high control and a small cabinet, but no deep bass without a subwoofer. This is exactly the profile you want when a single box has to be loud, point-source and compact at the same time.

Use and enclosure

An EBP of 166 points clearly to bass reflex. As a guideline derived from the Thiele-Small parameters: about 39 l net, tuned at 64 Hz, with an f3 around 71 Hz. A sealed build ends up near 18 l with fc around 121 Hz, which is a monitor or top-cabinet alignment with a subwoofer below. The exact design including port length is a job for the enclosure calculator at 42.audio. An Xmax of 7.5 mm gives enough excursion headroom for a reflex box of this size, provided a high-pass filter sits below the tuning frequency.

The recommended crossover of 1.0 kHz should be read as a lower limit. The 4" HF coil is the reason the tweeter can be coupled this low: it tolerates more thermal and mechanical stress than smaller coils. With active crossovers and steep slopes you can approach 1.0 kHz; with a passive network and shallow slopes, stay well above it. Typical targets: stage monitors with high headroom, compact full-range tops for rental, active main monitors in the studio.

What to look out for

  • 8 Ω nominal, Re 6.3 Ω: works with any common PA amplifier, 600 W AES as the power reference
  • Mounting depth 197 mm: the cabinet needs that depth plus clearance for the terminals
  • 8.5 kg despite neodymium: two 4" voice coils and the HF horn add mass
  • Titanium HF diaphragm with 90° conical dispersion: wide near-field coverage
  • Qts 0.31 and Vas 75 l: small box, but deep bass only with a subwoofer

Frequently asked questions

Is the 15NCX1000 suitable as a stage monitor?

Yes, that is one of its main purposes. Point-source radiation, a 90° cone and a small reflex volume of around 39 l fit a low-profile wedge. The 600 W rating leaves plenty of headroom for loud stages.

How does it differ from the 15NCX910?

The 15NCX910 uses 3" voice coils, has a higher sensitivity and a larger Vas of 107 l. The 15NCX1000 handles more power with its 4" coils, can be crossed lower and needs a smaller cabinet.

Which enclosure makes sense?

Bass reflex at about 39 l tuned around 64 Hz as a guideline. Sealed stays near 18 l, with fc around 121 Hz and a subwoofer taking over below. Verify the design with the enclosure calculator at 42.audio.

18Sound 15NCX1000: manufacturer, spellings and classification

18Sound, 18 Sound and Eighteensound all refer to the same manufacturer: Eighteen Sound S.r.l. of Reggio Emilia, Italy. The 15NCX1000 is a 15-inch coaxial driver from the NCX series, available from 42.audio, 18Sound dealer in Germany, with datasheet and full specifications in the driver database.

At 42.audio you get the 18SOUND 15NCX1000 with datasheet PDF, all key data in the driver database and the enclosure calculator. More drivers from this manufacturer: Atlas 18Sound.

Thiele-Small parameters

Nominal impedance8 Ω
Resonance frequency fs53 Hz
Total Q Qts0.31
Electrical Q Qes0.32
Mechanical Q Qms10.4
Equivalent volume Vas75.0 l
Moving mass Mms110.0 g
Cone area Sd881 cm²
Linear excursion Xmax7.5 mm
Force factor BL27.5 Tm
DC resistance Re6.3 Ω
Voice coil inductance Le1.4 mH

Enclosure suggestion

The EBP of 166 suggests a bass-reflex enclosure. EBP = fs / Qes = 53 / 0.32

Sealed (Qtc 0.707)

Enclosure volume Vb
17.9 l
System resonance Fc
121 Hz
Cut-off frequency F3
121 Hz

Bass reflex (QB3 after Small)recommended

Enclosure volume Vb
31.4 l
Tuning frequency Fb
69 Hz
Cut-off frequency F3
78 Hz

Vb is the required net internal volume, Fb the tuning frequency of the reflex port and F3 the frequency at which the level has dropped by 3 dB. Calculated approximation after Small. A starting point for simulation, not a finished build plan.

Comparable drivers

Same size, same type, Qts within ±30 %.

Specifications

Allgemein
Manufacturer 18SOUND
Category Coaxial
Series NCX
Impedance (Ω) 8
Power handling (W) 600
Sensitivity (dB) 96
Frequency from (Hz) 44
Frequency to (Hz) 3600
Abmessungen & Korb
Diameter 15
Voice coil (inch) 4
Mounting depth (mm) 197
Weight (kg) 8.5
Thiele-Small-Parameter
Re (Ω) 6.3
Le (mH) 1.4
Fs (Hz) 53
Qms 10.4
Qes 0.32
Qts 0.31
Vas (l) 75
Xmax (mm) 7.5
BL (Tm) 27.5
Mms (kg) 0.11
Sd (m²) 0.0881