Pioneer TS-A301D4 12" Dual 4-Ohm Car Subwoofer

The Pioneer TS-A301D4 is a 12-inch component car subwoofer designed to add low-frequency output to a compatible vehicle audio system. Its dual 4-ohm voice coils provide flexible wiring options for installers building a single-subwoofer or multi-subwoofer setup. It is intended for use with an external amplifier and a properly sized enclosure.

With 500 watts RMS continuous power handling and 1,600 watts maximum music power, this subwoofer is suited to systems that need a dedicated bass driver rather than relying on full-range speakers alone. Its specified frequency response extends from 20 Hz to 1.6 kHz, covering the low-bass range commonly assigned to a subwoofer. A 92 dB sensitivity rating helps it produce useful output with appropriately matched amplification.

The TS-A301D4 uses a two-piece Honeycomb IMPP composite cone structure with a rigid drive cone. This construction is designed to retain cone rigidity while helping control distortion at higher output levels. A dual-layer, fiber-reinforced elastic polymer surround and red spider support stable, linear cone movement.

Pioneer equips this model with a 90-ounce double-stacked magnet assembly and a long voice coil on an aluminum bobbin. The reinforced steel basket is designed to support the motor assembly and maintain accurate cone motion. Its enclosed lower basket structure also helps limit unnecessary vibration that can affect bass reproduction.

This subwoofer works well as part of a system upgrade with an external mono amplifier, suitable subwoofer wiring, and a dedicated sealed or ported enclosure. Pioneer lists a 1.25-cubic-foot sealed enclosure as the recommended volume, while a 1.5-cubic-foot ported enclosure is the recommended vented option. Check amplifier load capability, enclosure clearance, and the 11-1/8-inch cutout requirement before installation.

Key Features

• 12-Inch Subwoofer: Adds dedicated bass capability to a vehicle audio system.
• 500W RMS Handling: Supports continuous power in properly matched amplified systems.
• Dual 4-Ohm Voice Coils: Allow multiple wiring configurations for compatible amplifiers.
• Honeycomb IMPP Cone: Provides a rigid composite cone structure for bass reproduction.
• 90-Ounce Double-Stack Magnet: Supplies the motor strength behind the woofer assembly.
• Reinforced Steel Basket: Helps support the motor and reduce unwanted vibration.

Design & Installation

The TS-A301D4 combines a Honeycomb IMPP composite cone, rigid drive cone, dual-layer fiber-reinforced elastic polymer surround, red spider, aluminum-bobbin voice coil, and reinforced steel basket. Its 90-ounce double-stacked magnet is paired with a firmly enclosed lower basket section. These elements are engineered to support controlled excursion and durable operation in a car-audio enclosure.

Install the subwoofer in a dedicated enclosure with an 11-1/8-inch cutout and at least 6-1/8 inches of mounting-depth clearance. Pioneer specifies 1.25 cubic feet for a recommended sealed enclosure or 1.5 cubic feet for a recommended ported enclosure using one 3-inch-diameter by 6.5-inch-long port. Both voice coils must be connected to the amplifier; select series, parallel, or stereo wiring only after confirming the amplifier's supported impedance load.