CELESTION CF18VJD
CELESTION CF18VJD — 18" / 18 Zoll · Tieftöner · Ferrit
1600 W AES - 97 dB - 25 – 1500 Hz - 8 Ω
Art.-Nr.: 42A-CHS-TT-CEL-0011
Documents
CELESTION CF18VJD — 18" · Woofer
18-inch, cast aluminium chassis, ferrite magnet subwoofer
1600 W AES · 97 dB Sensitivity · Frequency range 25 Hz – 1500 Hz
Features
- Airflow vented magnet assembly for dynamic heat dispersion
- Twin demodulation rings
- Longer coil for greater control at high excursion
- Optimised double suspension
Technical data
- Diameter: 18 "
- Voice coil: 5 "
- Power handling: 1600 W
- Programme power: 3200W
- Sensitivity: 97 dB
- Impedance: 8 Ω
- Magnet: Ferrite
- Chassis: Cast aluminium
- Diaphragm: Carbon- and Kevlar-reinforced paper
- Surround: Cloth-sealed
- Suspension: Double
- Voice coil former: Glass fibre
- Voice coil wire: Copper, round wire
- Weight: 23 kg
- Mounting depth: 233 mm
- Cut-out: 416mm / 16.38in
- Frequency range: 25 – 1500 Hz
Thiele-Small parameters
- Fs: 34.5 Hz
- Qts: 0.309
- Qms: 4.573
- Qes: 0.332
- Vas: 145.81 l
- Xmax: 12 mm
- BL: 32.59 Tm
- Re: 6.13 Ω
- Le: 1.87 mH
- Mms: 0.2654 kg
- Sd: 0.1134 m²
Datasheet (PDF) · Manufacturer page
Part no.: 42A-CHS-TT-CEL-0011
Celestion CF18VJD: 18" subwoofer with 5" voice coil, 1600 W AES and 32.59 Tm
The Celestion CF18VJD is the flagship among the CF series 18" drivers and is built as a pure subwoofer unit: 1600 W AES on a 5" round copper wire voice coil, 97 dB at 8 Ω, rated band 25 to 1500 Hz. The coil is deliberately wound longer so it stays fully in the field even at high excursion; the double suspension guides it, and twin demodulation rings keep the flux linear. The cone is carbon- and Kevlar-loaded paper, the surround cloth-sealed, the ferrite magnet vented, the frame cast aluminium.
At 32.59 Tm the motor is the strongest in this range; it moves 265.4 g of cone mass at Fs 34.5 Hz, Qts 0.309 and Vas 145.81 l. Xmax is 12 mm. The weight of 23 kg shows how much magnet material sits behind the 5" coil, since ferrite needs mass to achieve this field strength. The EBP of 104 recommends vented or horn loading, the classic subwoofer formats.
Use and enclosure
The vented guideline is 75 l tuned to 42 Hz with a cut-off around 46 Hz. For an 18" that is a compact volume in which the strong motor keeps the cone tightly controlled; lower tunings cost volume and are quickly worked out with the enclosure calculator at 42.audio. Sealed, the figures come to about 34 l with a 79 Hz in-box resonance, which for a subwoofer only makes sense with substantial equalisation. The combination of high Bl, 12 mm Xmax and 1600 W AES is also intended for bandpass and horn enclosures.
The crossover to the top cabinet sits low in subwoofer duty; the upper rated limit of 1500 Hz is not a working range with this cone mass. Allow for 233 mm mounting depth and a 416 mm cut-out, and design the baffle so the driver's 23 kg is properly supported. With Re 6.13 Ω and Le 1.87 mH the driver is an uncritical 8 Ω load for subwoofer amplifiers.
What to look out for
- 5" voice coil, wound longer, with 1600 W AES: for high continuous load in a sub.
- 32.59 Tm motor at 23 kg weight: design the baffle accordingly sturdy.
- Xmax 12 mm with double suspension and twin demodulation rings.
- Vented guideline 75 l tuned to 42 Hz, EBP 104.
- 233 mm deep, 416 mm cut-out, Re 6.13 Ω.
Frequently asked questions
How does the CF18VJD differ from the 4"-coil 18" in the same series?
The CF18VJD has a 5" coil instead of 4", 1600 W AES, a 32.59 Tm motor and 23 kg of weight; it is the pure subwoofer driver for high continuous load. The lighter 4"-coil sibling can also be run sealed, whereas the VJD is meant for vented and horn loading at maximum level.
How large does the enclosure need to be?
The vented guideline is 75 l tuned to 42 Hz with a cut-off around 46 Hz. If you want to go lower than the guideline, increase the volume and lower the tuning; the Vas of 145.81 l and Qts 0.309 leave room for that, which you should check in the enclosure calculator.
Which amplifier suits 1600 W AES at 8 Ω?
An amplifier around the AES rating into 8 Ω; at 97 dB that delivers very high subwoofer levels. A high-pass below the tuning frequency and a limiter are mandatory at this power so that 12 mm Xmax and coil temperature are not exceeded.
Celestion CF18VJD: 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 CF18VJD is a 18-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 CF18VJD 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) | 1600 |
| Sensitivity (dB) | 97 |
| Frequency from (Hz) | 25 |
| Frequency to (Hz) | 1500 |
| Abmessungen & Korb | |
|---|---|
| Diameter | 18 |
| Voice coil (inch) | 5 |
| Mounting depth (mm) | 233 |
| Weight (kg) | 23 |
| Thiele-Small-Parameter | |
|---|---|
| Re (Ω) | 6.13 |
| Le (mH) | 1.87 |
| Fs (Hz) | 34.5 |
| Qms | 4.573 |
| Qes | 0.332 |
| Qts | 0.309 |
| Vas (l) | 145.81 |
| Xmax (mm) | 12 |
| BL (Tm) | 32.59 |
| Mms (kg) | 0.2654 |
| Sd (m²) | 0.1134 |