Eminence LAB 12C 12" Subwoofer Speaker, 4 Ohm

12" Subwoofer, 4 Ohm, 400 Watt

The LAB 12C, from Eminence, is a 4-ohm take on the original LAB 12 subwoofer (for more information on the LAB 12, visit the History of the LABhorn thread at ProSoundWeb). The 12C features the same long-throw construction with a heavy-duty 12-spoke die-cast aluminum frame and Kevlar reinforced paper cone. A lower impedance voice coil is designed to handle 500W RMS, 1,000W program power, and extract even more power from your amplifier, while nickel-plated, spring-loaded speaker terminals offer quick connection. Proudly made in the U.S.A.

Eminence's LAB 12C is designed to perform optimally in a small, sealed 1 cubic foot enclosure, or a 1.25 cubic foot vented enclosure (using a 4" diameter port that is 14.75" long for a 38 Hz tuning frequency) for automotive use. When used in either application, it is recommended to use a steep 35 Hz high-pass filter.

For home theater use, Eminence recommends a 4.5 cubic foot ported enclosure using a 4" diameter port that is 14.5" long that tunes the cabinet to 28 Hz and yields an F3 of 29 Hz. When used in this manner, a steep 25 Hz high pass filter is recommended.

For even more enclosure recommendations, see the Related Items section.

Features:

• Double stacked 80 oz. ferrite magnets
• Copper voice coil on Polyimide former
• 12-spoke die-cast aluminum basket
• Kevlar reinforced paper cone with foam cone edge
• Vented and extended pole piece

Specifications:

• SPECIFICATION
• Nominal Basket Diameter: 12", 304.8mm
• Nominal Impedance*: 4 ohms
• Power Rating**
• Watts: 500W
• Music Program: 1000W
• Resonance: 22.85Hz
• Usable Frequency Range: 25Hz - 0.12kHz
• Sensitivity***: 88.9dB
• Magnet Weight: 160 oz.
• Gap Height: 0.37", 9.53mm
• Voice Coil Diameter: 2.5", 63.5mm
• THIELE & SMALL PARAMETERS
• Resonant Frequency (fs): 22.85Hz
• DC Resistance (Re): 3.11
• Coil Inductance (Le): 1.09mH
• Mechanical Q (Qms): 11.7
• Electromagnetic Q (Qes): 0.34
• Total Q (Qts): 0.33
• Compliance Equivalent Volume (Vas): 128.31 liters / 4.53 cu.ft.
• Peak Diaphragm Displacement Volume (Vd): 659cc
• Mechanical Compliance of Suspension (Cms): 0.36mm/N
• BL Product (BL): 13.36 T-M
• Diaphragm Mass Inc. Airload (MMs): 135.63 grams
• Efficiency Bandwidth Product (EBP): 67.29
• Maximum Linear Excursion (Xmax): 13mm
• Surface Area of Cone (Sd): 506.7 cm2
• Maximum Mechanical Limit (Xlim): 22mm
• MOUNTING INFORMATION
• Recommended Enclosure Volume
• Sealed: 28.32-118.9 liters / 1-4.2 cu.ft.
• Vented: 39.64-141.5 liters / 1.4-5 cu.ft.
• Driver Volume Displaced: 188.6 cu.in. / 3.09 liters
• Overall Diameter: 12.32", 312.93mm
• Baffle Hole Diameter: 10.98", 278.9mm
• Front Sealing Gasket: Fitted as standard
• Rear Sealing Gasket: N/A
• Mounting Holes Diameter: 0.26", 6.6mm
• Mounting Holes B.C.D.: 11.77", 299mm
• Depth: 6.44", 164mm
• Net Weight: 22 lbs, 10 kg
• Shipping Weight: 23.8 lbs, 10.8 kgs
• MATERIALS OF CONSTRUCTION
• Coil Construction: Copper voice coil
• Coil Former: Polyimide former
• Magnet Composition: Double stacked 80 oz. ferrite magnets
• Core Details: Vented and extended core
• Basket Materials: 12-spoke die-cast aluminum basket
• Cone Composition: Kevlar-reinforced paper cone
• Cone Edge Composition: Foam cone edge
• Dust Cap Composition: Dual inverted dust caps