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BEYMA 12CXA400Fe

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BEYMA 12CXA400Fe — 12" / 12 inch · Coaxial Speaker · Coax / Coaxial Driver · Ferrite Magnet
400 W AES - 96 dB - 40 – 20000 Hz - 8 Ω
Part no.: 42A-CHS-KO-BEY-0006

416.00 € 416.0 EUR 416.00 €

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BEYMA 12CXA400Fe — 12" · Coaxial Speaker · Ferrite-Magnet

400 W AES · 96 dB Sensitivity · Frequency range 40 Hz – 20000 Hz

Technical data

  • Diameter: 12 "
  • Voice coil: 2.87 "
  • Power handling: 400 W AES
  • Sensitivity: 96 dB
  • Impedance: 8 Ω
  • Magnet: Ferrite
  • Weight: 11.3 kg
  • Frequency range: 40 – 20000 Hz

Series: CXA · Part no.: 42A-CHS-KO-BEY-0006

Beyma 12CXA400Fe: 12" ferrite coax with Qts 0.25, 400 W and 96 dB for small cabinets

A Qts of 0.25 on a 12" coax says a lot about intent: Beyma gave the 12CXA400Fe a strong ferrite motor with BL 19.8 Tm and a 2.87" voice coil so the driver stays controlled in compact cabinets. Key figures are 400 W AES, 96 dB sensitivity, 8 Ω and a stated frequency range of 40 Hz to 20,000 Hz for the complete coaxial system of the CXA series.

With Fs 42 Hz, Vas 94 l, Mms 66 g and an Xmax of 6 mm, the woofer is laid out for motor strength rather than excursion. The ferrite magnet system brings the driver to 11.3 kg, considerably more than its neodymium sibling, the 12CXA400Nd. In return, ferrite has an advantage that counts in installations: the magnet is forgiving of heat, and the mass damps mechanical resonances of the frame. For a studio monitor or a permanently installed box, weight is secondary anyway.

Use and enclosure

The EBP of 162 recommends bass reflex, and the tight motor keeps the volume small: guideline about 26 l net, tuned to 61 Hz, with f3 around 76 Hz. That is a 12" coax in the cabinet of a large bookshelf speaker. A sealed build ends up near 13 l with fc at 119 Hz, sensible as a sub satellite or a stage monitor with low end from a subwoofer. Since Qts 0.25 in a reflex alignment quickly produces a hump around the tuning, it pays to cross-check in the enclosure calculator at 42.audio and, if necessary, tune somewhat lower with equalisation.

The range up to 20,000 Hz makes it clear that the HF unit handles the rest; take the crossover frequency from Beyma's specifications for the CXA series. A high-pass below the tuning frequency protects the 6 mm Xmax. Suitable uses are actively driven studio monitors, installation boxes in bars and halls, and compact tops where a single driver covers the entire range.

What to look out for

  • 11.3 kg ferrite: for installation and studio, less so for touring
  • Qts 0.25, Vas 94 l: small reflex cabinet around 26 l as a guideline
  • 2.87" voice coil, 400 W AES at 8 Ω, Re 6.6 Ω: common amplifiers are enough
  • Xmax 6 mm: set a high-pass below the tuning frequency
  • Le 1.1 mH: plan impedance compensation with passive crossovers

Frequently asked questions

Ferrite or neodymium, 12CXA400Fe or 12CXA400Nd?

Both have Qts 0.25 and 400 W AES. The Nd with Fs 45 Hz and Vas 88.5 l is considerably lighter and slightly more sensitive; the Fe with Fs 42 Hz and Vas 94 l weighs 11.3 kg at 96 dB. For fixed boxes the Fe is a good choice, for mobile use the Nd.

How small can the cabinet be?

The guideline is 26 l bass reflex tuned to 61 Hz with f3 around 76 Hz. Sealed it is 13 l with fc around 119 Hz. Smaller is possible but costs extension, which the enclosure calculator at 42.audio shows.

Which alternative has more extension?

The Beyma 12XA30Nd with Fs 35 Hz, Qts 0.21 and Vas 172 l goes considerably deeper but needs more volume and has 4 mm Xmax. The 12CXA400Fe with Xmax 6 mm is designed for level in a compact cabinet.

At 42.audio you get the BEYMA 12CXA400Fe 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 fs42 Hz
Total Q Qts0.25
Electrical Q Qes0.26
Mechanical Q Qms7.2
Equivalent volume Vas94.0 l
Moving mass Mms66.0 g
Cone area Sd550 cm²
Linear excursion Xmax6 mm
Displaced volume Vd330 cm³
Force factor BL19.8 Tm
DC resistance Re6.6 Ω
Voice coil inductance Le1.1 mH

Enclosure suggestion

The EBP of 162 suggests a bass-reflex enclosure. EBP = fs / Qes = 42 / 0.26

Sealed (Qtc 0.707)

Enclosure volume Vb
13.4 l
System resonance Fc
119 Hz
Cut-off frequency F3
119 Hz

Bass reflex (QB3 after Small)recommended

Enclosure volume Vb
19.4 l
Tuning frequency Fb
69 Hz
Cut-off frequency F3
84 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 Coaxial
Series CXA
Magnet Ferrite
Impedance (Ω) 8
Power handling (W) 400
Sensitivity (dB) 96
Frequency from (Hz) 40
Frequency to (Hz) 20000
Abmessungen & Korb
Diameter 12
Voice coil (inch) 2.87
Weight (kg) 11.3
Thiele-Small-Parameter
Re (Ω) 6.6
Le (mH) 1.1
Fs (Hz) 42
Qms 7.2
Qes 0.26
Qts 0.25
Vas (l) 94
Xmax (mm) 6
Vd (cm³) 330
BL (Tm) 19.8
Mms (kg) 0.066
Sd (m²) 0.055