CELESTION CF1025BMB
CELESTION CF1025BMB — 10" / 10 Zoll · Tieftöner · Ferrit
300 W AES - 92.5 dB - 45 – 5000 Hz - 8 Ω
Art.-Nr.: 42A-CHS-TT-CEL-0004
Documents
CELESTION CF1025BMB — 10" · Woofer
10-inch, cast aluminium chassis, ferrite magnet mid/bass driver
300 W AES · 92.5 dB Sensitivity · Frequency range 45 Hz – 5000 Hz
Features
- Optimised for bass and mid/bass applications
- Half-roll Elastomer surround enables greater Xmax and Xmech
- Modified T-pole profile ensures improved Bl symmetry, for lower distortion performance
- Glass-loaded paper cone with weather-resistant coating
- Airflow vented magnet assembly for dynamic heat dispersion
Technical data
- Diameter: 10 "
- Voice coil: 2.5 "
- Power handling: 300 W
- Programme power: 600W
- Sensitivity: 92.5 dB
- Impedance: 8 Ω
- Magnet: Ferrite
- Chassis: Cast aluminium
- Diaphragm: Glass-fibre reinforced paper (weather-resistant)
- Surround: Elastomer
- Suspension: Single
- Voice coil former: Polyimide
- Voice coil wire: Copper, round wire
- Weight: 4.3 kg
- Mounting depth: 124.5 mm
- Cut-out: 233.8mm / 9.2in
- Frequency range: 45 – 5000 Hz
Thiele-Small parameters
- Fs: 40.9 Hz
- Qts: 0.355
- Qms: 7.952
- Qes: 0.371
- Vas: 46.1 l
- Xmax: 6.65 mm
- BL: 15.28 Tm
- Re: 6.04 Ω
- Le: 1.15 mH
- Mms: 0.0559 kg
- Sd: 0.0346 m²
Datasheet (PDF) · Manufacturer page
Part no.: 42A-CHS-TT-CEL-0004
Celestion CF1025BMB: 10" bass/mid driver with Fs 40.9 Hz and 6.65 mm Xmax
The Celestion CF1025BMB is the CF series' 10" bass/mid driver, designed for low-end extension from manageable cabinets: 300 W AES, 92.5 dB at 8 Ω, rated band 45 to 5000 Hz. The 2.5" round copper wire voice coil sits on a polyimide former, the magnet is ferrite with airflow venting for cooling, the frame cast aluminium. The glass-loaded paper cone carries a weather-resistant coating and sits in a half-roll elastomer surround that frees up the excursion a bass/mid driver needs.
Its character is defined by Fs 40.9 Hz, Vas 46.1 l, Qts 0.355 and Xmax 6.65 mm with 55.9 g of moving mass and a 15.28 Tm motor. The modified T-pole profile is intended to make the Bl curve more symmetrical over excursion, which translates directly into lower distortion at low frequencies and high travel. The EBP of 110 sits at the boundary between vented and sealed loading, leaning towards a reflex box when extension matters.
Use and enclosure
The vented guideline from the parameters is 35 l tuned to 44 Hz with a cut-off around 45 Hz. That is a 10" driver that genuinely reaches into the low bass from a compact two-way cabinet without needing a subwoofer. Sealed, the figures are about 16 l with an 81 Hz in-box resonance, suited to a satellite or stage monitor on a sub. You can adapt both variants to your own dimensions with the enclosure calculator at 42.audio.
Upwards the rated band reaches 5000 Hz, so in a two-way box the driver works with a 1" or 1.4" compression driver on a horn from Celestion's horns and waveguides category; the crossover sits sensibly well below the upper rated limit, because the 10" cone with its 0.0346 m² area starts beaming earlier than an 8". At 124.5 mm mounting depth, a 233.8 mm cut-out and 4.3 kg the driver fits comfortably into monitor and top cabinets.
What to look out for
- Fs 40.9 Hz and Xmax 6.65 mm: real extension from 35 l vented, as a guideline.
- 92.5 dB: excursion rather than efficiency, size the amplifier accordingly.
- 2.5" coil of round copper wire on polyimide, vented ferrite magnet.
- Weather-resistant coated cone and elastomer surround for outdoor use.
- 124.5 mm deep, 233.8 mm cut-out, 4.3 kg.
Frequently asked questions
CF1025BMB or CF1025C: which 10" should I choose?
The CF1025BMB, with Fs 40.9 Hz, Vas 46.1 l and 6.65 mm Xmax, is built for extension and delivers 92.5 dB. The CF1025C is noticeably louder but has a higher resonance frequency and less excursion. For a box that has to produce bass without a sub, the BMB is the right pick; for maximum level with a sub underneath, the C.
How large does the enclosure need to be?
The vented guideline is 35 l tuned to 44 Hz, sealed about 16 l. Smaller is possible but costs extension; run the variant through the enclosure calculator before you cut wood.
Is the CF1025BMB suitable for outdoor use?
The cone is weather-resistant coated and the surround is elastomer, which copes with moisture better than untreated paper. Protection against direct rain is still the enclosure's job.
Celestion CF1025BMB: manufacturer, spellings and classification
Celestion is the British loudspeaker manufacturer Celestion International Ltd. of Ipswich, England; its PA drivers are also known as Celestion Pro Audio. The CF1025BMB is a 10-inch woofer with ferrite magnet from the CF series, available from 42.audio, Celestion dealer in Germany, with datasheet and full specifications in the driver database.
At 42.audio you get the CELESTION CF1025BMB with all key data in the driver database and the enclosure calculator. More drivers from this manufacturer: Atlas Celestion.
Specifications
| Allgemein | |
|---|---|
| Manufacturer | CELESTION |
| Category | Low Frequency |
| Series | CF |
| Magnet | Ferrite |
| Impedance (Ω) | 8 |
| Power handling (W) | 300 |
| Sensitivity (dB) | 92.5 |
| Frequency from (Hz) | 45 |
| Frequency to (Hz) | 5000 |
| Abmessungen & Korb | |
|---|---|
| Diameter | 10 |
| Voice coil (inch) | 2.5 |
| Mounting depth (mm) | 124.5 |
| Weight (kg) | 4.3 |
| Thiele-Small-Parameter | |
|---|---|
| Re (Ω) | 6.04 |
| Le (mH) | 1.15 |
| Fs (Hz) | 40.9 |
| Qms | 7.952 |
| Qes | 0.371 |
| Qts | 0.355 |
| Vas (l) | 46.1 |
| Xmax (mm) | 6.65 |
| BL (Tm) | 15.28 |
| Mms (kg) | 0.0559 |
| Sd (m²) | 0.0346 |