4
Frequency Response (Hz)
25-400
Sensitivity (2.83v/1m)
92 dB
Impedance (nominal Z, ohms)
4
Rated Program Power, Watts
500
Fs (Hz)
26.8
Qts
.85
Qms
10.6
Qes
.92
Efficiency Bandwidth Product (Fs/Qes)
29.1
Vas (ft
3
)
3.32
Vas (liters)
94.1
Vas (m
3
)
.094
Cms (um/N)
298
DCR (ohms)
3.64
Levc (mH) @ 1 KHz
1.35
BL (Tesla m)
9.49
Sd (in
2
)
73.0
Sd (m
2
)
.047
Sd (cm
2
)
471
X max; one way (linear mm)
11.0
X max; one way (peak mm)
28.7
Vd (linear cm
3
)
518
Vd (peak cm
3
)
1352
Vd (linear m
3
)
0.000518
Vd (peak m
3
)
0.001352
Mms (grams)
118
Magnet Assembly (oz)
256
Magnet Weight (oz)
104
Vf (volume of frame, in
3
)
225
SPECIFICATIONS &
THIELE/SMALL PARAMETERS
5
BUILDING THE ENCLOSURE
This owner's manual contains an enclosure for your subwoofer. The following
are general procedures to follow to build this enclosure:
•
Determine the dimensions of your enclosure.
•
Be certain the box you have designed will fit into the location you have
chosen. Sometimes making a cardboard box with the same outside
dimensions is helpful.
•
Use 3/4 inch thick Medium Density Fiberboard (MDF) or High Density
Particleboard. It is preferable to cut the wood with a table saw to ensure
straight, even joints. If a table saw is not available, a circular saw is
acceptable.
•
Use a “T” square to verify precise right angle gluing.
•
Use a high quality wood glue and air nails or wood screws to assemble the
enclosure. Elmer’s
woodworker’s glue and Weldwood
work well. To
guarantee an airtight box, seal each inside joint with silicone sealant.
•
Stuff the chamber with 50-75% filling (approximately 1.5 pounds per cubic
foot) of fiberglass insulation or Dacron
.
•
Use the supplied gasket to seal the woofer in the enclosure and eight (8)
wood screws or T-nuts and bolts. Progressively tighten each of the bolts or
screws to prevent warping the woofer frame.
•
Use slide-on connectors to attach speaker wires. DO NOT solder wires to
the provided terminals as this may cause damage to the factory wire
connection. This may also void the speaker’s warranty.
CALCULATING NET INTERNAL ENCLOSURE VOLUMES
When constructing any type of enclosure, you must be aware that the
outside dimensions DO NOT represent the true (net) volume inside.
Such things as woofers, thickness of enclosure material, dividing walls,
and any internal bracing will reduce the total amount of the actual air
space available. The following worksheet has been designed to
provide you with the necessary steps to accurately calculate the net
internal volume of any given enclosure.
