Product Description
The Eminence Delta 12A is a 12-inch professional mid-bass/woofer designed for vented enclosures with high-pass filtering. Built for professional audio applications, it offers 400W RMS / 800W program power handling, a wide frequency response from 54 Hz to 5 kHz, and high sensitivity for efficient sound output.
With a 56 oz. ferrite magnet, 2.5-inch aluminum voice coil, and durable paper cone, the Delta 12A delivers deep, clear bass and detailed midrange, making it ideal for PA systems, stage monitors, and custom vented cabinet designs.
Features
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12" professional mid-bass/woofer for vented enclosures
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8-ohm impedance for broad amplifier compatibility
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Power handling: 400W RMS / 800W program
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Frequency response: 54 Hz – 5 kHz for clear, full-range sound
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Sensitivity: 98.3 dB for efficient output
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Ferrite magnet with 56 oz. weight for strong low-frequency response
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Aluminum 2.5" voice coil for durability and heat resistance
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Pressed steel basket and paper cone with cloth surround
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Solid felt dust cap for protection and sound clarity
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Designed specifically for vented enclosures (25.5–85 liters / 0.9–3 cu.ft.)
Specifications
General
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Nominal Basket Diameter: 12" (305 mm)
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Nominal Impedance: 8 Ω
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Power Rating:
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Program Power: 800 W
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RMS/Continuous: 400 W
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Resonance (Fs): 55 Hz
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Usable Frequency Range: 54 Hz – 5 kHz
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Sensitivity: 98.3 dB
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Magnet Weight: 56 oz
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Voice Coil Diameter: 2.5" (64 mm)
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Gap Height: 0.375" (9.5 mm)
Thiele & Small Parameters
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Fs: 55 Hz
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Re: 6.3 Ω
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Le: 0.74 mH
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Qms: 5.27
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Qes: 0.46
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Qts: 0.43
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Vas: 81.3 liters / 2.87 cu.ft.
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Vd: 125 cc
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Cms: 0.21 mm/N
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BL: 13.5 T-M
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MMs: 39 g
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EBP: 120
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Xmax: 2.4 mm
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Xlim: 9.9 mm
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Sd: 519.5 cm²
Mounting Information
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Recommended Enclosure Volume: Vented: 25.5–85 liters / 0.9–3 cu.ft. (Sealed: N/A)
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Driver Displacement: 0.079 cu.ft / 2.25 liters
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Overall Diameter: 12.03" (305.6 mm)
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Baffle Hole Diameter: 11.07" (281.2 mm)
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Mounting Hole Diameter: 0.25" (6.4 mm)
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Bolt Circle Diameter: 11.59" (294.4 mm)
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Depth: 5.35" (135.9 mm)
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Front & Rear Gasket: Yes
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Net Weight: 11.4 lbs (5.17 kg)
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Shipping Weight: 13.5 lbs (6.12 kg)
Materials of Construction
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Voice Coil: Aluminum
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Former: Polyimide
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Magnet: Ferrite, vented core
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Basket: Pressed steel
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Cone: Paper
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Surround: Cloth edge
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Dust Cap: Solid felt
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