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18SOUND 18W1001

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18SOUND (Eighteen Sound) 18W1001 — 18" / 18 inch · Woofer · Subwoofer / Bass · Ferrite Magnet
4" voice coil · 8 Ω
Part no.: 42A-CHS-TT-18S-0010

350.00 € 350.0 EUR 350.00 €

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18SOUND 18W1001 — 18" · Woofer

1000 W AES · 99 dB Sensitivity · Frequency range 37 Hz – 4700 Hz

Technical data

  • Diameter: 18 "
  • Voice coil: 4 "
  • Power handling: 1000 W AES
  • Sensitivity: 99 dB
  • Impedance: 8 Ω
  • Magnet: Ferrite
  • Weight: 13.6 kg
  • Mounting depth: 205 mm
  • Frequency range: 37 – 4700 Hz

Datasheet (PDF) · Manufacturer page

Series: W · Part no.: 42A-CHS-TT-18S-0010

18Sound 18W1001: 18" ferrite bass with 99 dB and Qts 0.23 for horn and reflex

Efficiency before excursion – that sums up the 18W1001 from 18Sound's W series. 99 dB sensitivity, a moving mass of only 0.139 kg and a Qts of 0.23 make it a driver that produces a lot of level from little power. The ferrite motor with 4" voice coil delivers 27.6 Tm, and power handling is 1000 W at 8 Ω.

With 7 mm Xmax the excursion is modest, but the response spans 37 Hz to 4700 Hz – unusually wide for an 18" and a sign of a light, stiff cone. Within the 18Sound range the 18W1001 is the classic bass for horn loading and kick-bass duty, not the deep-bass specialist. Its 205 mm mounting depth is shallow for an 18" driver.

Use and enclosure

An EBP of 146 is unambiguous: horn or bass reflex, sealed boxes deliver little depth. The bass reflex guideline is about 59 l tuned to 55 Hz with f3 around 71 Hz – a compact kick-bass that is complemented by horn loading or a subwoofer underneath. Sealed would give about 32 l with fc at 108 Hz, sensible only as a bandpass chamber or inside a horn. The enclosure calculator at 42.audio shows how the alignments behave with Vas 268 l and fs 35 Hz.

As the bass in a 2-way horn system the 18W1001 can be crossed over high thanks to its 4700 Hz bandwidth; the crossover should still sit well above the 37 Hz lower limit and take the beaming of an 18" cone into account.

What to look out for

  • Qts 0.23 and EBP 146: horn loading or reflex, not a candidate for sealed boxes
  • Xmax 7 mm – a high-pass filter below the tuning frequency is mandatory
  • Mounting depth only 205 mm, but 13.6 kg of ferrite weight
  • 8 Ω, Re 5.8 Ω, 1000 W handling: runs on almost any amplifier

Frequently asked questions

Does the 18W1001 work as a deep-bass subwoofer?

Only to a limited extent: with 7 mm Xmax and a reflex tuning around 55 Hz it is a kick-bass. For deep bass, a long-throw driver with more Xmax is the better choice.

How does it differ from the Beyma 18QLEX1600Fe?

Both have Qts 0.23; the Beyma sits lower at fs 30 Hz with a smaller Vas of 195 l. The 18W1001 with fs 35 Hz and 268 l Vas leans even further towards efficiency and horn operation.

Which amplifier suits it?

An 8 Ω amplifier up to 1000 W is plenty; with 99 dB sensitivity it reaches high levels at low power. More important than watts is a clean high-pass to protect the cone.

18Sound 18W1001: 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 18W1001 is a 18-inch woofer with ferrite magnet from the W 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 18W1001 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 fs35 Hz
Total Q Qts0.23
Electrical Q Qes0.24
Mechanical Q Qms7.1
Equivalent volume Vas268.0 l
Moving mass Mms139.0 g
Cone area Sd1,134 cm²
Linear excursion Xmax7 mm
Force factor BL27.6 Tm
DC resistance Re5.8 Ω
Voice coil inductance Le2.45 mH

Enclosure suggestion

The EBP of 146 suggests a bass-reflex enclosure. EBP = fs / Qes = 35 / 0.24

Sealed (Qtc 0.707)

Enclosure volume Vb
31.7 l
System resonance Fc
108 Hz
Cut-off frequency F3
108 Hz

Bass reflex (QB3 after Small)recommended

Enclosure volume Vb
42.0 l
Tuning frequency Fb
62 Hz
Cut-off frequency F3
79 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 Low Frequency
Series W
Magnet Ferrite
Impedance (Ω) 8
Power handling (W) 1000
Sensitivity (dB) 99
Frequency from (Hz) 37
Frequency to (Hz) 4700
Abmessungen & Korb
Diameter 18
Voice coil (inch) 4
Mounting depth (mm) 205
Weight (kg) 13.6
Thiele-Small-Parameter
Re (Ω) 5.8
Le (mH) 2.45
Fs (Hz) 35
Qms 7.1
Qes 0.24
Qts 0.23
Vas (l) 268
Xmax (mm) 7
BL (Tm) 27.6
Mms (kg) 0.139
Sd (m²) 0.1134