Descriere
Key Features
- 95 dB SPL 1W / 1m average sensitivity
- 100 mm (4 in) Interleaved Sandwich Voice coil (ISV)
- 3200 Watt program power handling
- Composite reinforced straight ribbed cone
- Optimized high grade ferrite magnet assembly
- Recommended for subwoofer usage in compact vented or bandpass enclosures
Description
The 21LW2500 is a 21″ (533 mm) extended low frequency loudspeaker, designed for use in vented or bandpass enclosure. The loudspeaker is designed to withstand high power levels without damage while providing clean and undistorted LF reproduction at a very high SPL. For optimum results we recommend amplifiers able to deliver 3600 Watt program power. The 21LW2500 features a unique motor featuring a high grade ferrit magnet assembly in a structure optimized for thermal and magnetic efficiency. 21LW2500 features include a large displacement suspension system which, in conjunction with a composite reinforced, straight ribbed cone and the Eighteen Sound proprietary Double Silicon Spider (DSS) technology, allows an ultra-linear piston action and provides full mechanical control across the entire working range. The 100mm (4 in) state-of-the-art voice-coil utilizing Interleaved Sandwich Voice coil (ISV) technology, provides high levels of thermal stability and durability. The ISV technology achieves a balanced linear motor unit exerting an exceptionally high force factor.
Date tehnice:
General Specifications
| Nominal Diameter | 533 mm (21 in) |
| Rated Impedance | 8 Ohm |
| AES Power | 1600 W |
| Program Power | 3200 W |
| Peak Power | 7200 W |
| Sensitivity | 95 dB |
| Frequency Range | 30-1000Hz |
| Power Compression @-10dB | TBD |
| Power Compression @-3dB | TBD |
| Power Compression @Full Power | TBD |
| Max Recomm. Frequency | 200 Hz |
| Recomm. Enclosure Volume | 130 – 500 lt (4.59-17.7 cuft) |
| Minimum Impedance | 6,1 Ohm @ 25° |
| Max Peak To Peak Excursion | 70 mm (2,76 in) |
| Voice Coil Diameter | 100 mm (4 in) |
| Voice Coil Winding Material | Copper wire |
| Suspension | Triple roll, Heavy Polycotton |
| Cone | Curved ribbed fiber loaded cellulose |
Thiele Small Parameters
| Fs | 30 Hz |
| Re | 4,8 Ohm |
| Sd | 0,166 sq.m (175,15 sq.in) |
| Qms | 9,35 |
| Qes | 0,37 |
| Qts | 0,35 |
| Vas | 290 lt. (10,24 cu.ft) |
| Mms | 368 gr. (0,80 lb) |
| BL | 30,5 Tm |
| Linear Mathematical Xmax | ±14,5 mm (±0,57 in) |
| Le (1kHz) | 2,58 mH |
| Ref. Efficiency 1W@1m (half space) | 95,4 dB |
Mounting information
| Overall diameter | 545 mm (21,46 in) |
| N. of mounting holes and bolt | 8 |
| Mounting holes diameter | 8,5 mm (0,33 in) |
| Bolt circle diameter | 520 mm (20,47 in) |
| Front mount baffle cutout ø | 492 mm (19,37 in) |
| Rear mount baffle cutout ø | 490 mm (19,29 in) |
| Total depth | 252 mm (9,92 in) |
| Flange and gasket thickness | 18 mm (0,7 in) |
| Net weight | 17,9 kg (39,4 lb) |
| Shipping weight | 19,4 kg (42,7 lb) |
| CardBoard Packaging dimensions | 570x570x290 mm (22,4×22,4×11,4 in) |
Models
| Model | Code | Information |
|---|---|---|
| 21LW2500 | 8 Ohm |
