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BEYMA 18LEX1000Fe

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BEYMA 18LEX1000Fe — 18" / 18 inch · Woofer · Subwoofer / Bass · Ferrite Magnet
1000 W AES - 98 dB - 35 – 1000 Hz - 8 Ω
Part no.: 42A-CHS-TT-BEY-0012

315.00 € 315.0 EUR 315.00 €

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  • Impedance (Ω)
  • Power handling (W)
  • Sensitivity (dB)
  • Frequency from (Hz)
  • Frequency to (Hz)
  • Diameter
  • Voice coil (inch)
  • Mounting depth (mm)
  • Weight (kg)
  • Re (Ω)
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  • Fs (Hz)
  • Qms
  • Qes
  • Qts
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  • Xmax (mm)
  • Vd (cm³)
  • BL (Tm)
  • Mms (kg)
  • Sd (m²)

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BEYMA 18LEX1000Fe — 18" · Woofer · Ferrite-Magnet

1000 W AES · 98 dB Sensitivity · Frequency range 35 Hz – 1000 Hz

Technical data

  • Diameter: 18 "
  • Voice coil: 3.5 "
  • Power handling: 1000 W AES
  • Sensitivity: 98 dB
  • Impedance: 8 Ω
  • Magnet: Ferrite
  • Weight: 11.75 kg
  • Mounting depth: 224 mm
  • Frequency range: 35 – 1000 Hz

Series: LEX · Part no.: 42A-CHS-TT-BEY-0012

Beyma 18LEX1000Fe: 18" subwoofer driver with 11 mm Xmax, ferrite motor and 1000 W AES

An 18" woofer with 11 mm linear excursion, 3.5" voice coil and 1000 W AES power handling: the Beyma 18LEX1000Fe from the LEX series is designed as a subwoofer driver for vented enclosures. The ferrite motor puts 11.75 kg on the scale, sensitivity is 98 dB, the usable range 35 to 1000 Hz at 8 Ω.

The parameters are laid out for extension: fs 34 Hz, Qts 0.38 and Vas 250 l describe a soft suspension with moderate electrical damping. With 196 g of moving mass, BL 23.8 Tm and a displacement volume of 1,380 cm³, the driver delivers output down into the low bass in large volumes. Within the LEX family the 18LEX1000Fe is the ferrite variant at 1000 W; the sister model 18LEX1000Nd offers the same design with a neodymium motor.

Use and enclosure

An EBP of 87 allows both enclosure types. Vented is the obvious choice: the guideline is 233 l tuned to 34 Hz with an f3 also around 34 Hz – a large but, for an 18" sub, normal box that makes full use of the range from 35 Hz upwards. Sealed, 102 l with fc at 63 Hz is the starting point; more compact, but at the cost of extension and efficiency. Keep the mounting depth of 224 mm in mind when setting the cabinet depth.

As a subwoofer it is crossed far below the upper limit of 1000 Hz; the coil inductance of 1.9 mH provides a gentle roll-off towards high frequencies anyway. A high-pass below the tuning frequency protects the suspension when the full 1000 W is applied. Fine tuning and port dimensions come from the enclosure calculator at 42.audio.

What to look out for

  • 8 Ω, Re 5.4 Ω: a standard load for PA amplifiers rated for 8 Ω.
  • 11.75 kg with ferrite magnet: plan sufficient wall thickness and mounting hardware.
  • Mounting depth 224 mm: choose the internal cabinet depth accordingly.
  • Xmax 11 mm, Vd 1,380 cm³: good excursion for subwoofer duty, a high-pass below fb still makes sense.
  • Le 1.9 mH: upper limit 1000 Hz, uncritical for pure subwoofer use.

Frequently asked questions

18LEX1000Fe or 18LEX1000Nd?

Electrically and acoustically they are very similar: fs 34 Hz, Qts 0.38 versus 0.39, Vas 250 l versus 260 l. The difference is the magnet material: neodymium is lighter, ferrite loses less flux when the magnet heats up under sustained load. For a fixed installation the weight hardly matters.

How big does the enclosure need to be?

The vented guideline is 233 l tuned to 34 Hz. Less volume is possible but raises the tuning frequency and f3. Sealed, 102 l with fc at 63 Hz is the starting point – intended for applications that do not need the lowest bass region.

Is the power handling enough for PA use?

1000 W AES into 8 Ω is a solid figure for a 3.5" voice coil. Together with 98 dB sensitivity you reach high levels in a vented box around 233 l. What matters is a limiter or high-pass that keeps the 11 mm Xmax from being exceeded below the tuning frequency.

Beyma 18LEX1000Fe: manufacturer, spellings and classification

Beyma and Acustica Beyma refer to the same manufacturer: Acústica Beyma S.L. of Moncada near Valencia, Spain. The 18LEX1000Fe is a 18-inch woofer with ferrite magnet from the LEX series, available from 42.audio, Beyma dealer in Germany, with datasheet and full specifications in the driver database.

At 42.audio you get the BEYMA 18LEX1000Fe with all key data in the driver database and the enclosure calculator. More drivers from this manufacturer: Atlas Beyma.

Thiele-Small parameters

Nominal impedance8 Ω
Resonance frequency fs34 Hz
Total Q Qts0.38
Electrical Q Qes0.39
Mechanical Q Qms7.3
Equivalent volume Vas250.0 l
Moving mass Mms196.0 g
Cone area Sd1,255 cm²
Linear excursion Xmax11 mm
Displaced volume Vd1,380 cm³
Force factor BL23.8 Tm
DC resistance Re5.4 Ω
Voice coil inductance Le1.9 mH

Enclosure suggestion

The EBP of 87 is in the intermediate range — either works; sealed plays tighter, bass reflex deeper and louder. EBP = fs / Qes = 34 / 0.39

Sealed (Qtc 0.707)

Enclosure volume Vb
101.6 l
System resonance Fc
63 Hz
Cut-off frequency F3
63 Hz

Bass reflex (QB3 after Small)

Enclosure volume Vb
205.2 l
Tuning frequency Fb
36 Hz
Cut-off frequency F3
37 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 BEYMA
Category Low Frequency
Series LEX
Magnet Ferrite
Impedance (Ω) 8
Power handling (W) 1000
Sensitivity (dB) 98
Frequency from (Hz) 35
Frequency to (Hz) 1000
Abmessungen & Korb
Diameter 18
Voice coil (inch) 3.5
Mounting depth (mm) 224
Weight (kg) 11.75
Thiele-Small-Parameter
Re (Ω) 5.4
Le (mH) 1.9
Fs (Hz) 34
Qms 7.3
Qes 0.39
Qts 0.38
Vas (l) 250
Xmax (mm) 11
Vd (cm³) 1380
BL (Tm) 23.8
Mms (kg) 0.196
Sd (m²) 0.1255