BEYMA 8CFX260Nd
BEYMA 8CFX260Nd — 8" / 8 inch · Coaxial Speaker · Coax / Coaxial Driver · Neodymium Magnet
250 W AES - 97 dB - 100 – 20000 Hz - 8 Ω
Part no.: 42A-CHS-KO-BEY-0008
Documents
BEYMA 8CFX260Nd — 8" · Coaxial Speaker · Neodymium-Magnet
250 W AES · 97 dB Sensitivity · Frequency range 100 Hz – 20000 Hz
Technical data
- Diameter: 8 "
- Voice coil: 2.85 "
- Power handling: 250 W AES
- Sensitivity: 97 dB
- Impedance: 8 Ω
- Magnet: Neodymium
- Weight: 4.9 kg
- Frequency range: 100 – 20000 Hz
Series: CFX · Part no.: 42A-CHS-KO-BEY-0008
Beyma 8CFX260Nd: 8" coaxial midrange with 2.85" voice coil, 97 dB and neodymium
The Beyma 8CFX260Nd is no ordinary 8" coaxial. With a 2.85" voice coil, Fs 100 Hz and a response starting at 100 Hz it is designed as a coaxial midrange: a driver for the region where most systems have their crossover troubles, combined with a central HF unit that continues up to 20,000 Hz. The CFX series at Beyma stands for exactly this combination of a large coil and a midrange-oriented design.
The figures line up: 97 dB sensitivity at 8 Ω, 250 W AES, BL 13.5 Tm against only 21 g of moving mass, and Qts 0.35. The neodymium motor keeps the weight at 4.9 kg, remarkable for a coil of this size. Vas 8 l and Xmax 6 mm indicate a stiff, controlled system that works at high midrange levels without relying on large excursions.
Use and enclosure
With an EBP of 270 and a resonance at 100 Hz the case is clear: the 8CFX260Nd belongs in a sealed midrange chamber. As a guideline, around 2.6 l is enough, giving a corner frequency of 202 Hz; place the crossover to the woofer well above the resonance. Bass reflex is possible on paper with about 5.9 l tuned to 108 Hz and a lower limit around 113 Hz, but the benefit over the sealed chamber is small. The enclosure calculator on 42.audio gives the detailed design.
That makes the driver the mid-high unit for three-way PA systems with one or two large woofers, for main studio monitors with high dynamic demands, and for horn systems where a coaxial handles the mid-high range as a point source. The crossover between cone and HF unit is your own design; the parameters are in the driver database.
What to look out for
- 2.85" voice coil at 250 W AES: very high thermal power handling in midrange duty.
- Fs 100 Hz, EBP 270: a pure midrange, sealed chamber of around 2.6 l.
- 97 dB at 8 Ω: matches efficient woofers and compression drivers in PA systems.
- 4.9 kg despite the large coil: neodymium keeps the weight in check.
- Re 5.2 Ω, Le 0.23 mH: low inductance, benign for the crossover.
Frequently asked questions
What distinguishes the 8CFX260Nd from the 18 Sound 8CX401F?
The 8CX401F has a much lower resonance at Fs 56 Hz and Vas 23.9 l and suits use as a compact full-range coaxial. The 8CFX260Nd, with Fs 100 Hz and the large 2.85" voice coil, is consistently designed for midrange and power handling; both share a similar Qts around 0.35.
Can I run it without a subwoofer?
Not sensibly. The response starts at 100 Hz, and even in a vented box the cutoff is around 113 Hz. The driver needs a woofer below it; then it plays to its strengths as a mid-high unit.
Which amplifier power fits?
With 97 dB you reach high levels even with moderate power amps; the 250 W AES rating is the ceiling. A high-pass that keeps frequencies below the working range away from the cone is essential, and then the full power handling is usable.
Beyma 8CFX260Nd: manufacturer, spellings and classification
Beyma and Acustica Beyma refer to the same manufacturer: Acústica Beyma S.L. of Moncada near Valencia, Spain. The 8CFX260Nd is a 8-inch coaxial driver with neodymium magnet from the CFX 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 8CFX260Nd with all key data in the driver database and the enclosure calculator. More drivers from this manufacturer: Atlas Beyma.
Thiele-Small parameters
| Nominal impedance | 8 Ω |
|---|---|
| Resonance frequency fs | 100 Hz |
| Total Q Qts | 0.35 |
| Electrical Q Qes | 0.37 |
| Mechanical Q Qms | 4.8 |
| Equivalent volume Vas | 8.0 l |
| Moving mass Mms | 21.0 g |
| Cone area Sd | 220 cm² |
| Linear excursion Xmax | 6 mm |
| Displaced volume Vd | 132 cm³ |
| Force factor BL | 13.5 Tm |
| DC resistance Re | 5.2 Ω |
| Voice coil inductance Le | 0.23 mH |
Comparable drivers
Same size, same type, Qts within ±30 %.
- 18 Sound 8CX650fs 65 Hz · Qts 0.35 · Vas 16.6 l · in the database
- B&C Speakers 8CX21fs 74 Hz · Qts 0.36 · Vas 15 l · in the database
- B&C Speakers 8FCX51fs 69 Hz · Qts 0.34 · Vas 16 l · in the database
- B&C Speakers 8CXN64fs 71 Hz · Qts 0.33 · Vas 10.5 l · in the database
- 18 Sound 8CX401Ffs 56 Hz · Qts 0.34 · Vas 23.9 l · in the shop
- SB Audience ROSSO-8CX250fs 70 Hz · Qts 0.32 · Vas 15.8 l · in the database
Specifications
| Allgemein | |
|---|---|
| Manufacturer | BEYMA |
| Category | Coaxial |
| Series | CFX |
| Magnet | Neodymium |
| Impedance (Ω) | 8 |
| Power handling (W) | 250 |
| Sensitivity (dB) | 97 |
| Frequency from (Hz) | 100 |
| Frequency to (Hz) | 20000 |
| Abmessungen & Korb | |
|---|---|
| Diameter | 8 |
| Voice coil (inch) | 2.85 |
| Weight (kg) | 4.9 |
| Thiele-Small-Parameter | |
|---|---|
| Re (Ω) | 5.2 |
| Le (mH) | 0.23 |
| Fs (Hz) | 100 |
| Qms | 4.8 |
| Qes | 0.37 |
| Qts | 0.35 |
| Vas (l) | 8 |
| Xmax (mm) | 6 |
| Vd (cm³) | 132 |
| BL (Tm) | 13.5 |
| Mms (kg) | 0.021 |
| Sd (m²) | 0.022 |