Help with 18 inch Sub Enclouser vented (2)design

Hello Friends,
I have 2 18 inches sub driver and wants to design for them. I have the parameters and tried my best to design on a software but was unsuccessful.
If anybody can please give me a design dimensions I’ll be grateful.
Driver 18 inch 1500 W 4.5 inch in out coil. Pure paper cone.
NOMINAL DIAMETER: 18 inch / 457 mm
RATED IMPEDANCE: 8 ohms
PROGRAM POWER: 3600 W
POWER HANDLING CAPACITY: 1800 W
SENSITIVITY: 97.0 dB
FREQUENCY RANGE: 30 – 1000 Hz
EFFECTIVE PISTON DIAMETER: 395 mm / 15.55 inch
MAX. EXCURSION BEFORE DAMAGE: 54 mm / 2.13 inch
MINIMIM IMPEDANCE: 6.8 ohm
VOICE COIL DIAMETER: 4.5 inch / 114 mm
VOICE COIL WINDING MATERIAL: Copper
VOICE COIL LENGTH: 34 mm / 1.34 inch
NUMBER OF LAYERS: 2







Thiele - small parameters
RESONANCE FREQUENCY (FS)30 Hz
DC RESISTANCE (RE)5.40 ohm
MECHANICAL FACTOR6.70 Qms
ELECTRICAL FACTOR (QES)0.29 Qes
TOTAL FACTOR0.28 Qts
BL FACTOR (BL)30.50 T x m
EFFECTIVE MOVING MASS (MMS)260.0 g
EQUIVALENT CAS AIR LOADED (VAS)220.0 liters
EFFECTIVE PISTON AREA (SD)0.120 m2
MAX. LINEAR EXCURSION (XMAX)14.0 mm
VOICE COIL INDUCTANCE @ 1KHZ (LE1K)1.38 mH
HALF-SPACE EFFICIENCY (EFF)1.90%
Mounting Information
OVERALL DIAMETER465 mm / 18.31 inches
BOLT CIRCLE DIAMETER442-447 mm / 17.4-17.6 inch
BOLT HOLE DIAMETER7 mm / 0.28 inch
FRONT MOUNT BAFFLE CUT-OUT424 mm / 16.69 inch
REAR MOUNT BAFFLE CUT-OUT 424 mm / 16.69 inch
VOLUME OCCUPIED BY THE DRIVER6.5 liters / 0.26 ft3
CE MARKINGYes
SIZE
WEIGHT15.2 kg / 33.51 lbs
HEIGHT212 mm / 8.35 inches
DIAMETER465 mm / 18.31 inches
 
RCF LF18X451 by the looks of it.

It will help others to help you if you tell us a bit more info.

What kind of encvironment will it be used in - eg home, live gigs, outdoors vs indoors etc.

What kind of program material will you mainly use it for - eg mainstream music vs EDM vs Movies etc

Do you have any other limitations such as max size or limited amp power available?

HTH,
David.
 

GM

Member
Joined 2003
Indeed, it's designed for either a huge high power sub, mid-bass horn or mid-bass sealed or vented alignment. Otherwise put it in an acoustically tiny (20* Vas*Qts^3.3 = ~66 L net) sealed box and use DSP to frequency shape it to suit.
 
its a classic assisted 6th order woofer - so a 151.6l vented box tuned ~fs
 

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