カテゴリ:RCF 18( 1 )
RCF LF18N451
LF21N451と同時に発売されたRCF社の18インチユニットです。
BL30.2、Mms235g、プログラム許容入力3000W、連続許容入力1500W。
耐熱型ネオジウム磁石による磁気回路、ボイスコイルは4.5インチ径のサンドイッチ型、200gを超える実効質量、そしてダブルスパイダーの超強力サブウーファーユニットです。
詳しくはこちらを。

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GENERAL SPECIFICATIONS
Nominal Diameter 460/18 mm/inch
Rated Impedance 8 Ohm
Program Power 3000 Watts
Power handling capacity 1500 Watts
Sensitivity 1W, 1m 97.5 dB
Frequency Range 30-1000 Hz
Effective Piston Diameter 395/15.6 mm/inch
Maximum Excursion Before Damage 60/2.36 mm/inch
Minimum Impedance 6.3 Ohm
Voice Coil Diameter 115/4.5 mm/inch
Voice Coil Material Copper
Voice Coil Winding Depth 25/1 mm/inch
Number of layers 2
Kind of layer inside/outside
Thickness Top Plate Depth 15/0.6 mm/inch
Cone Material No pressed pulp
Cone Design Curved
Surround Material Polycotton
Surround Design Triple roll

THIELE - SMALL PARAMETERS
Resonance frequency Fs 31 Hz
DC resistance Re 5.0 Ohm
Mechanical factor Qms 6.0
Electrical factor Qes 0.25
Total factor Qts 0.24
BL factor BL 30.2 T - m
Effective Moving Mass Mms 235 gr
Equivalent Cas air load Vas 245 liters
Effective piston area Sd 0.122 m2
Max. linear excursion Xmax 8.8 mm
Voice - coil inductance @ 1KHz Le1k 2.6 mH
Half-space efficiency Eff 2.54 %

MOUNTING INFORMATION
Overall Diameter 465/18.3 mm/inch
Bolt Circle Diameter 442-447/17.4-17.6 mm
Bolt Hole Diameter 6.5/0.25 mm/inch
Front Mount Baffle Cut-out 424/16.7 mm/inch
Rear Mount Baffle Cut-out 425/16.7 mm/inch
Depth 205/8.1 mm/inch
Volume occupied by the driver 5.5/0.19 liters/ft3

BAFFLE CUTOUT DIAMETER
Net Weight 10.6/23.3 Kg/lbs
Shipping Weight 11.8/26 Kg/lbs

















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[PR]
by kiirojbl | 2008-11-28 15:14 | RCF 18