Overview

4 ohm hemp cone speaker with rich, warm, full bodied tone with fat, punchy lows, smooth, but defined highs, and a nice break up. Prominent mids, but with a warm, smooth texture.

SPECIFICATION

Nominal Basket Diameter

8", 203 mm

Nominal Impedance*

4 Ω

Power Rating*

Program Power

40 W

Watts

20 W

Resonance

144 Hz

Usable Frequency Range

80 Hz - 4.6 kHz

Sensitivity*

96.1 dB

Magnet Weight

15 oz.

Gap Height

0.25", 6.4 mm

Voice Coil Diameter

1", 25 mm

THIELE & SMALL PARAMETERS

Resonant Frequency (fs)

144 Hz

DC Resistance (Re)

3.64 Ω

Coil Inductance (Le)

0.33m H

Mechanical Q (Qms)

18.78

Electromagnetic Q (Qes)

0.92

Total Q (Qts)

0.88

Compliance Equivalent Volume (Vas)

9.62 liters / 0.34 cu.ft.

Peak Diaphragm Displacement Volume (Vd)

36.7 cc

Mechanical Compliance of Suspension (Cms)

0.13 mm/N

BL Product (BL)

5.74 T-M

Diaphragm Mass Inc. Airload (MMs)

9 grams

Efficiency Bandwidth Product (EBP)

156

Maximum Linear Excursion (Xmax)

1.59 mm

Surface Area of Cone (Sd)

230.9 cm2

Maximum Mechanical Limit (Xlim)

N/A

MOUNTING INFORMATION

Recommended Enclosure Volume

Sealed

Acceptable

Vented

Acceptable

Driver Volume Displaced

0.018 cu.ft. / 0.51 liters

Overall Diameter

8.24", 209.3 mm

Baffle Hole Diameter

7.13", 181.1 mm

Front Sealing Gasket

Yes

Rear Sealing Gasket

N/A

Mounting Holes Diameter

0.22", 5.6mm

Mounting Holes B.C.D.

7.75", 196.9mm

Depth

3.06", 77.7 mm

Net Weight

3.1 lbs, 1.41 kg

Shipping Weight

3.9 lbs, 1.77 kgs

MATERIALS OF CONSTRUCTION

Coil Construction

Copper voice coil

Coil Former

Polyimide former

Magnet Composition

Ferrite magnet

Core Details

Non-vented core

Basket Materials

Pressed steel basket

Cone Composition

Hemp cone

Cone Edge Composition

Paper cone edge

Dust Cap Composition

Zurette dust cap

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