1,000 Watts of Constant Power Rockford Fosgate's Class-BD Mono Subwoofer Amplifier, Built for Maximum Subwoofer Performance.

Product Overview

The Rockford Fosgate Power T1000-1BDCP is a 1,000W mono amplifier built exclusively for subwoofer applications. Based on the legendary T1000-1bd platform, the T1000-1BDCP adds a proprietary Constant Power configuration that Rockford Fosgate claims delivers up to 25% more power across all impedance loads compared to the standard design providing more usable wattage regardless of whether your subwoofer presents a 1Ω, 2Ω, or 4Ω load.

The Class-BD topology delivers high efficiency and control, while the MOSFET power supply and MOSFET output stage provide the current delivery capacity and switching speed needed to drive demanding subwoofer loads cleanly at high output levels. The onboard 24dB/octave crossover and infrasonic filter shape the frequency response specifically for subwoofer use keeping the amplifier and subwoofer operating within their optimal range while RCA pass-thru outputs allow the signal chain to continue to additional amplifiers.

Key Specifications

• Power output: 1,000W (mono — rated power at specific impedance not confirmed — see Red-flags)
• Amplifier class: Class-BD
• Configuration: Monoblock (subwoofer dedicated)
• Constant Power technology: Yes — up to 25% more power across all impedance loads (supplier-stated)
• Crossover: 24dB/octave
• Infrasonic filter: Yes
• Power supply: MOSFET
• Output stage: MOSFET
• Speaker connections: Audiophile grade
• Power/ground connectors: 4 gauge
• RCA pass-thru outputs: Yes
• Frequency response: Subwoofer optimised (specific Hz range not confirmed — confirm with Rockford Fosgate)
• Signal to noise ratio: Not specified — confirm with Rockford Fosgate
• THD: Not specified — confirm with Rockford Fosgate
• Input voltage range: Not specified — confirm with Rockford Fosgate
• Dimensions: Not specified — confirm with Rockford Fosgate
• Weight: Not specified — confirm with Rockford Fosgate
• Warranty: Not specified — confirm with Rockford Fosgate

Features & Benefits

• Constant Power Technology — Up to 25% More Power Across All Impedance Loads — Most amplifiers deliver their rated power at a single nominal impedance and produce less at other loads. Rockford Fosgate's Constant Power configuration maintains maximum output more consistently across the full range of subwoofer impedances — meaning whether your sub is wired to 1Ω, 2Ω, or 4Ω, you're getting closer to the full 1,000W. (Supplier-stated performance claim.)
• Class-BD Topology — Class-BD is Rockford Fosgate's proprietary amplifier topology combining the efficiency of Class-D with the audio performance characteristics of Class-B/AB. Designed to deliver high current to low-impedance subwoofer loads with low distortion and thermal efficiency.
• MOSFET Power Supply and Output Stage — Metal Oxide Semiconductor Field-Effect Transistors in both the power supply and output stage provide fast switching speeds, high current headroom, and thermal stability — critical for sustained high-current subwoofer operation at loud levels.
• 24dB/Octave Crossover — A steep 24dB/octave crossover slope precisely limits the frequency range sent to the subwoofer, preventing midrange and high-frequency content from reaching the sub. The steeper slope compared to common 12dB/octave designs provides cleaner integration with the main speaker system.
• Infrasonic Filter — Removes sub-20Hz content that is inaudible but capable of inducing large, potentially damaging cone excursions in ported or bandpass subwoofer enclosures. The infrasonic filter protects subwoofer driver integrity without affecting audible bass performance.
• RCA Pass-Thru Outputs — Signal pass-through allows the amplifier input signal to be looped to a second amplifier in the system — useful for multi-amplifier builds where the T1000-1BDCP handles the subwoofer channel and a separate amplifier handles the full-range speakers.
• 4 Gauge Power and Ground Connectors — 4-gauge wiring input accommodates substantial power delivery to a 1,000W mono amplifier, ensuring the wiring connection does not become a current bottleneck at peak output.
• Audiophile Grade Speaker Connections — High-quality speaker output terminals provide a solid, low-resistance connection to the subwoofer voice coil — important for maximising power transfer and minimising contact resistance at high current levels.

Technical Specs

Compatible With / Goes Well With

Suitable subwoofer configurations:

• Single or dual subwoofer setups requiring a dedicated mono amplifier
• 1Ω, 2Ω, and 4Ω impedance loads (Constant Power maintains output across all — confirm specific power ratings per impedance with Rockford Fosgate)
• High-performance ported, sealed, and bandpass subwoofer enclosures

Pairs well with:

• Rockford Fosgate Power series subwoofers (T1, T2, T3 series)
• OEX or Rockford Fosgate 4-gauge amplifier wiring kits
• Rockford Fosgate or aftermarket RCA signal cables
• A full-range 4 or 5-channel amplifier (using the RCA pass-thru to continue the signal chain)

Frequently Asked Questions

What does "Constant Power" mean on the T1000-1BDCP?

Constant Power is Rockford Fosgate's proprietary technology that maintains rated power output more consistently across different impedance loads. Where a standard amplifier may deliver full rated power at 2Ω but significantly less at 4Ω, the T1000-1BDCP's Constant Power configuration delivers up to 25% more power than a standard design across the full impedance range. Specific power ratings at each impedance should be confirmed with Rockford Fosgate.

What is Class-BD and how does it differ from Class-D?

Class-BD is Rockford Fosgate's proprietary topology combining characteristics of Class-B/AB and Class-D amplifier designs. It is engineered specifically for subwoofer applications, targeting the current delivery and efficiency characteristics needed for low-impedance, high-output bass amplification. Specific THD and efficiency figures should be confirmed with Rockford Fosgate.

What does the infrasonic filter do and do I need it?

The infrasonic filter removes frequencies below approximately 20Hz — sounds that are inaudible but can cause the subwoofer cone to over-travel, potentially damaging the driver. It is particularly important for ported and bandpass enclosures where cone excursion at very low frequencies is less controlled than in a sealed box. For most subwoofer installations, the infrasonic filter should be enabled.

What gauge wiring do I need for the T1000-1BDCP?

The T1000-1BDCP has 4-gauge power and ground connectors. A minimum of 4-gauge cable is recommended for the power and ground runs from the battery and chassis earth. Confirm the specific wiring requirements for your installation length and current draw with your installer or Rockford Fosgate's wiring guide.

Can I use the RCA pass-thru outputs to run additional amplifiers?

Yes. The RCA pass-thru outputs loop the input signal to additional amplifiers downstream — allowing the T1000-1BDCP to sit in series in the signal chain rather than requiring a Y-split at the headunit. This is useful in multi-amplifier systems where the T1000-1BDCP handles the subwoofer channel and a separate amplifier handles the front and rear speaker channels.