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BEYMA 18PWB1000Fe/S

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BEYMA 18PWB1000Fe/S — 18" / 18 inch · Woofer · Subwoofer / Bass · Ferrite Magnet
1000 W AES - 96 dB - 30 – 2000 Hz - 8 Ω
Part no.: 42A-CHS-TT-BEY-0011

405.00 € 405.0 EUR 405.00 €

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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)
  • Le (mH)
  • Fs (Hz)
  • Qms
  • Qes
  • Qts
  • Vas (l)
  • Xmax (mm)
  • Vd (cm³)
  • BL (Tm)
  • Mms (kg)
  • Sd (m²)

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BEYMA 18PWB1000Fe/S — 18" · Woofer · Ferrite-Magnet

1000 W AES · 96 dB Sensitivity · Frequency range 30 Hz – 2000 Hz

Technical data

  • Diameter: 18 "
  • Voice coil: 4 "
  • Power handling: 1000 W AES
  • Sensitivity: 96 dB
  • Impedance: 8 Ω
  • Magnet: Ferrite
  • Weight: 13.5 kg
  • Mounting depth: 212 mm
  • Frequency range: 30 – 2000 Hz

Series: PWB · Part no.: 42A-CHS-TT-BEY-0011

Beyma 18PWB1000Fe/S: 18" subwoofer with 1000 W AES and Fs 27 Hz for deep reflex tuning

The Beyma 18PWB1000Fe/S is an 18" woofer from the PWB series with a ferrite magnet, 4" voice coil and 1000 W AES power handling. It is built for subwoofers and bass cabinets in sound reinforcement, where continuous output and low-frequency extension have to coexist: 96 dB sensitivity and 12.5 mm of linear excursion give a displacement volume of 1560 cm³, which is the amount of air actually moved per half cycle.

Within the 18" class the parameter set stands out. Fs 27 Hz, Qts 0.38 and Vas 317 l are numbers that suit a low-tuned vented enclosure rather than a compact bandpass. The moving mass of 245 g is moderate for a ferrite 18", and the motor with BL 25 Tm keeps it well controlled. At 13.5 kg and 212 mm mounting depth the driver also remains manageable, which is not a given for ferrite motors of this size.

Use and enclosure

The Thiele-Small guideline for a vented box works out to a net volume of about 296 l tuned to 27 Hz, with the f3 also landing near 27 Hz. That is a large cabinet, but it buys you extension that smaller 18" designs simply do not reach. For a sealed box the guideline is roughly 129 l with fc around 50 Hz, and the EBP of 68 confirms that both alignments are viable. Run the exact design through the enclosure calculator at 42.audio.

The usable range starts at 30 Hz; the upper figure of 2000 Hz only marks the end of the transmission range, and in a subwoofer you will cross over far below that. With 8 Ω and 1000 W AES, an amplifier delivering roughly that power cleanly into 8 Ω is the right match, combined with a subsonic high-pass below the tuning frequency so the cone does not unload beneath fb.

What to look out for

  • 8 Ω nominal impedance, Re 6 Ω: two drivers in parallel present the amplifier with 4 Ω.
  • Mounting depth 212 mm, and the ferrite magnet still needs clearance to the rear panel.
  • 13.5 kg per driver: factor the total cabinet weight into a dual-18" sub.
  • Xmax 12.5 mm linear, distortion rises beyond it; place a high-pass below fb.
  • Le 2 mH: the impedance rise toward higher frequencies is irrelevant in subwoofer duty.

Frequently asked questions

How does the 18PWB1000Fe/S differ from the Beyma 18LEX1200Fe?

Both share Qts 0.38. The 18LEX1200Fe is slightly stiffer with Fs 32 Hz and Vas 277 l and gets by with a smaller vented box. The 18PWB1000Fe/S reaches lower with Fs 27 Hz and Vas 317 l, but needs more volume to do so.

Which amplifier suits the 18PWB1000Fe/S?

Plan on an amplifier delivering in the region of the 1000 W AES rating into 8 Ω. Clean limiting matters more than the last watt, because clipping stresses the 4" voice coil thermally far more than undistorted musical peaks do.

Does the driver work in a sealed enclosure as well?

Yes, the guideline is about 129 l with fc around 50 Hz. You give up the extension of the vented alignment, but the box needs less than half the reflex volume and can be extended downward quite well with DSP equalisation.

Beyma 18PWB1000Fe/S: manufacturer, spellings and classification

Beyma and Acustica Beyma refer to the same manufacturer: Acústica Beyma S.L. of Moncada near Valencia, Spain. The 18PWB1000Fe/S is a 18-inch woofer with ferrite magnet from the PWB 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 18PWB1000Fe/S 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 fs27 Hz
Total Q Qts0.38
Electrical Q Qes0.4
Mechanical Q Qms8.2
Equivalent volume Vas317.0 l
Moving mass Mms245.0 g
Cone area Sd1,255 cm²
Linear excursion Xmax12.5 mm
Displaced volume Vd1,560 cm³
Force factor BL25 Tm
DC resistance Re6 Ω
Voice coil inductance Le2 mH

Enclosure suggestion

The EBP of 68 is in the intermediate range — either works; sealed plays tighter, bass reflex deeper and louder. EBP = fs / Qes = 27 / 0.4

Sealed (Qtc 0.707)

Enclosure volume Vb
128.8 l
System resonance Fc
50 Hz
Cut-off frequency F3
50 Hz

Bass reflex (QB3 after Small)

Enclosure volume Vb
260.2 l
Tuning frequency Fb
29 Hz
Cut-off frequency F3
29 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 PWB
Magnet Ferrite
Impedance (Ω) 8
Power handling (W) 1000
Sensitivity (dB) 96
Frequency from (Hz) 30
Frequency to (Hz) 2000
Abmessungen & Korb
Diameter 18
Voice coil (inch) 4
Mounting depth (mm) 212
Weight (kg) 13.5
Thiele-Small-Parameter
Re (Ω) 6
Le (mH) 2
Fs (Hz) 27
Qms 8.2
Qes 0.4
Qts 0.38
Vas (l) 317
Xmax (mm) 12.5
Vd (cm³) 1560
BL (Tm) 25
Mms (kg) 0.245
Sd (m²) 0.1255