ENCLOSURE RECOMMENDATIONS
Optimum Sealed Volume
Internal volume: 2.2ft3 /62.58L
Enclosure "Q": .95
-3dB response: 44.3Hz
Efficiency: 92dB
Maximum power handling: 400 watts db
Cu. feet/liters “Q”
1.01
large sealed volume: .8
-3dB
49.6Hz
41Hz
16.5"
Efficiency
92.9dB
91.3dB
19.3"
PE
400 watts
400 watts
Optimum Vented Volume
Internal volume: 3.35ft3 / 94.86L
Tuning frequency: 32Hz
Port (D x L): (2)4" x 16.25"***
-3dB response: 37.4Hz
Efficiency: 94.1dB
Maximum power handling: 400 watts db
22.5"
Cu. feet/liters Tune to Port -3dB small vented volume: 2.8/79.29 33Hz (2)4” x 19.7” 40.3Hz
large vented volume: 4.0/113.27 29Hz (2)4” x 16.6” 34.1Hz
20.5"
Efficiency PE
94.4dB
400 watts
93.3dB
400 watts
Optimum Bandpass Volume
Front volume: 2.21ft3 / 62.58L
Rear volume: 1.79ft3 / 50.69L
Tuning frequency: 61.5Hz
Port (D x L): (2)5" x 8.25"
-3dB response: 39 - 96Hz
Efficiency: 96.1dB
Maximum power handling: 400 watts db
Front
14"
Rear
12"
18" 28.25"
Front cu. ft/liters Rear cu.ft/liters Tune to
2.04/57.77
2.24/63.43
1.96/55.5
2.26/64
Port
68.3Hz (2)5”x 6.7” 38– 100Hz
61.1Hz (2)5”x 8.2”
-3dB
34 – 89Hz
Efficiency
97.2dB
96.1dB
PE
400 watts
400 watts
*Note: Dimensions given require the use of 0.75" (19mm) board.
**Be sure to add in .109ft3 / 3.09L for driver displacement in all "Other" enclosures.
***WARNING: Due to long port length, slot porting will most likely be needed. Tube ports are for illustration purposes only.
DAMPING MATERIAL
The most common damping materials used are Dacron and Polyfill. Reclaimed fiber underlay has been discovered to be an excellent substitute especially when glued directly to the walls of the enclosure. Fiberglass may be used, but please limit usage to sealed enclosures only. When used in vented/bandpass enclosures, fiberglass fibers escaping through the port may be hazardous to your health.
SEALED ENCLOSURE
VENTED ENCLOSURE
BANDPASS (sealed chamber)
BANDPASS (vented chamber)
DACRON/POLYFILL loosely fill the enclosure line 3-5 walls line 3 walls line 1 wall (optional)
UNDERLAY
line 5 walls
line 1-3 wall
line 1-3 wall
line 1 wall (optional)
SPECIFICATIONS
FIBERGLASS line 5 walls
Please limit the use of fiberglass to sealed enclosures only
Model
Driver description
Mounting depth, in./mm
Cutout dimensions, in./mm
Impedance
Nominal power handling
Maximum power handling (PE)
Dynamic power handling
Voice coil – size
Magnet weight
Frequency response
Resonance frequency (fs)
QTS
QMS
QES
VAS, ft./liter
X-max, in./mm
Efficiency (2.83V/1M)
DBW15D
15” Subwoofer, Dual Voice Coil
6.5/165.1
13.85/13.85
4 ohms per coil
250watts
500 watts
1000 watts
2”, 4 layer
54 oz.
18Hz to 500Hz
24.1Hz
.428
9.479
.449
9.537/269.77
.308/7.82
91.2dB
POWER RATINGS
Rating the power handling of subwoofers is not a difficult task. However, understanding power ratings is often confusing. Many times the Maximum Power Ratings are viewed as the RMS power handling of the driver, when in actuality Maximum is generally the break point of the driver. This has lead Crossfire to come up with a system to rating the power necessary to drive our subwoofers. Please read the following cautiously before choosing your amplifier.
Nominal power handling
-Nominal power handling is the power rating given by Crossfire at which the subwoofer will experience minimal mechanical degradation over time when using a recommended enclosure. In other words, this is the recommended power to be used per woofer to assure long life.
Maximum power handling (PE)
-Maximum power handling is the power rating given by Crossfire at which the subwoofer could experience a high amount of mechanical degradation that may lead to possible failure over time when using a recommended enclosure. In other words, do not exceed this power level for extended periods of time.
Dynamic power handling
-Dynamic power handling is the power rating given by Crossfire for peak transients and short bursts.
Continuous playing at or above this level will cause mechanical failure and/or thermal failure. In other
This could possibly void your warranty.
words, this power level should never be attained with the exceptions of approved SPL competition vehicles.
