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Silver Flute W17RC38-04 6.5″ Woofer Wool Cone 4 ohm

Wool Cone
Cast Frame
38mm VC Ø on aluminum former
Vented Pole Piece
Rubber Surround
Includes black phillips head wood screws for mounting
Use QC205R & QC205B quick connects

The Silver Flute line offers exceptional value, build quality, and versatility.  

The woofer cones and dust caps are made from a special mixture of wool and paper fibers. These wool fibers help reduce cone resonance, and give the woofers a slightly warmer sound than traditional paper cones. 

The woofers have durable rubber surrounds and robust cast metal frames. The large voice coils are vented through the back plate. 

These Silver Flute woofers are available in 4, 8, and 16 ohm. 

Consider this product for home stereo, surround sound, autosound systems, and commercial line arrays. 

Please look at the mechanical specifications carefully as terms like 5″, 6.5″, and 8″ are generalizations.

Mechanical Specifications:

Frame diameter 167mm (6.57″)
Cut out diameter 147mm (5.79″)
Bolt hole circle 160mm (6.3″)
Screw holes 4.2mm (0.17″)
Flange thickness 5mm (0.20″)
Magnet diameter 111mm (4.38″)
Depth (from back of flange) 75mm (2.95″)

Suggested Box Alignments:

0.15 cubic foot sealed box for an f3 of 125Hz
0.25 cubic foot with 1.5″ diameter vent by 5″ long for an f3 of 70Hz
0.4 cubic foot with 2″ diameter vent by 6″ long for an f3 of 55Hz

Specifications:

Re 3.7 Ohms
Sensitivity 91.5 dB
Power 80 watts
Fs 37.5 Hz
Qms 1.52
Qes 0.28
Qts 0.24
Vas 25.6 Ltrs
Mms 17.4 g
Cms 1036.1 mM/N
Sd 0.0132 M2
BL 7.31 TM
X-max 5 mm
Le @ 1kHz 0.53 mH
Frame Ø 167 mm
Screw hole circle is 160 mm
Cutout Ø 147 mm
Depth 75 mm
Krm 1.370 mW
Kxm 17.805 mH
Erm 0.818
Exm 0.599

Frequency & Impedance Response: