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BEYMA 8CX300Nd/N

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BEYMA 8CX300Nd/N — 8" / 8 inch · Coaxial Speaker · Coax / Coaxial Driver · Neodymium Magnet
250 W AES - 96 dB - 60 – 20000 Hz - 8 Ω
Part no.: 42A-CHS-KO-BEY-0009

397.00 € 397.0 EUR 397.00 €

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  • Series
  • Magnet
  • Impedance (Ω)
  • Power handling (W)
  • Sensitivity (dB)
  • Frequency from (Hz)
  • Frequency to (Hz)
  • Diameter
  • Voice coil (inch)
  • 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 8CX300Nd/N — 8" · Coaxial Speaker · Neodymium-Magnet

250 W AES · 96 dB Sensitivity · Frequency range 60 Hz – 20000 Hz

Technical data

  • Diameter: 8 "
  • Voice coil: 1.75 "
  • Power handling: 250 W AES
  • Sensitivity: 96 dB
  • Impedance: 8 Ω
  • Magnet: Neodymium
  • Weight: 2.8 kg
  • Frequency range: 60 – 20000 Hz

Series: CX · Part no.: 42A-CHS-KO-BEY-0009

Beyma 8CX300Nd/N: 8" neodymium coaxial with 96 dB, 250 W AES and extension from 60 Hz

Among the 8" coaxials, the Beyma 8CX300Nd/N is the one with the widest range of use. Its response starts at 60 Hz, the resonance is at 61 Hz, and with Vas 23 l and Qts 0.29 you can build a compact vented full-range speaker that carries speech and music without a subwoofer. The HF unit at the centre extends to 20,000 Hz, and the cone works with a 1.75" voice coil.

The neodymium motor with BL 12 Tm moves only 20 g of mass, which yields 96 dB sensitivity at 8 Ω and a very high Qms of 13: little mechanical loss, with damping coming almost entirely from the motor. 250 W AES power handling, Xmax 6 mm and a weight of 2.8 kg complete a driver made for portable two-way boxes and compact monitors.

Use and enclosure

The EBP of 203 points to bass reflex, and the guidelines are practical: around 9.9 l tuned to 78 Hz, with a lower cutoff around 90 Hz. That is a small enclosure for an 8" coaxial with complete reproduction above the bass region; add a subwoofer and it becomes a full system. As a midrange in a three-way design it works in a sealed midrange chamber of about 4.7 l with a corner frequency of 149 Hz. Port length and fine tuning are calculated with the enclosure calculator on 42.audio.

Typical applications: compact PA tops and stage monitors, nearfield and midfield studio monitors, high-efficiency home cinema speakers, and mid-high units in larger systems. The crossover between cone and HF unit is your own design; the Thiele-Small parameters are in the driver database.

What to look out for

  • 2.8 kg: neodymium makes the 8" coaxial light enough for portable boxes.
  • 96 dB at 8 Ω, 250 W AES: high SPL with moderate amplifier power.
  • Qts 0.29, EBP 203: bass reflex with around 9.9 l as a guideline.
  • Re 5.4 Ω, Le 0.3 mH: allow for the inductance in the crossover.
  • Xmax 6 mm with Sd 220 cm²: enough for a top, plan a subwoofer for deep bass.

Frequently asked questions

How does the 8CX300Nd/N differ from the FaitalPRO 8HX230?

The 8HX230 has a higher resonance at Fs 70 Hz and a smaller equivalent volume of 14.7 l at practically the same Qts of 0.29. The 8CX300Nd/N reaches lower with its 61 Hz resonance and allows a lower vented tuning, needing slightly more volume in return.

Is the coaxial enough as a full-range box without a subwoofer?

For speech, conference and many music applications, yes: in the guideline enclosure the lower limit is around 90 Hz, and with the response starting at 60 Hz there is still usable output below. For bass-heavy music you add a subwoofer.

Which amplifier?

With 96 dB at 8 Ω even a small power amp gives decent levels; up to 250 W AES there is reserve. More important than power is a high-pass below the tuning frequency to protect the cone from over-excursion in the vented box.

Beyma 8CX300Nd/N: manufacturer, spellings and classification

Beyma and Acustica Beyma refer to the same manufacturer: Acústica Beyma S.L. of Moncada near Valencia, Spain. The 8CX300Nd/N is a 8-inch coaxial driver with neodymium magnet from the CX 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 8CX300Nd/N 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 fs61 Hz
Total Q Qts0.29
Electrical Q Qes0.3
Mechanical Q Qms13
Equivalent volume Vas23.0 l
Moving mass Mms20.0 g
Cone area Sd220 cm²
Linear excursion Xmax6 mm
Displaced volume Vd132 cm³
Force factor BL12 Tm
DC resistance Re5.4 Ω
Voice coil inductance Le0.3 mH

Enclosure suggestion

The EBP of 203 suggests a bass-reflex enclosure. EBP = fs / Qes = 61 / 0.3

Sealed (Qtc 0.707)

Enclosure volume Vb
4.7 l
System resonance Fc
149 Hz
Cut-off frequency F3
149 Hz

Bass reflex (QB3 after Small)recommended

Enclosure volume Vb
7.7 l
Tuning frequency Fb
86 Hz
Cut-off frequency F3
99 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 CX
Magnet Neodymium
Impedance (Ω) 8
Power handling (W) 250
Sensitivity (dB) 96
Frequency from (Hz) 60
Frequency to (Hz) 20000
Abmessungen & Korb
Diameter 8
Voice coil (inch) 1.75
Weight (kg) 2.8
Thiele-Small-Parameter
Re (Ω) 5.4
Le (mH) 0.3
Fs (Hz) 61
Qms 13
Qes 0.3
Qts 0.29
Vas (l) 23
Xmax (mm) 6
Vd (cm³) 132
BL (Tm) 12
Mms (kg) 0.02
Sd (m²) 0.022