Soundstream RSM1.4000D front view demonstrates compact monoblock design for tight installs.
Soundstream RSM1.4000D side profile shows slim footprint ideal for discreet under-seat mounting.
Soundstream RSM1.4000D heat sink ensures efficient cooling during demanding use.
Soundstream RSM1.4000D wired bass knob enables on-the-fly level adjustments.
Soundstream RSM1.4000D RCA inputs offer flexible signal sources.
Soundstream RSM1.4000D fuse panel protects the system during events.
Soundstream RSM1.4000D box includes fuses and wiring for installation.

Soundstream

Soundstream RSM1.4000D: Compact 1-Channel 4000W Monoblock Subwoofer Amplifier | 1 Ohm Stable

High-performance electronics accessories made for confident daily results

$190.65

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Why customers choose Nexoltic

Powerful, Compact Subwoofer Amplification

Meet Soundstream RSM1.4000D, a single-channel, Class-D monoblock designed to fit tight trunk spaces while delivering serious bass energy. With a stable 1-ohm operation and a robust heatsink, it balances performance and durability for daily driving in a range of vehicles.

Key specifications at a glance

  • Class-D mono block: efficient power designed for sustained bass
  • Power: up to 4,000 watts peak; 1,200 watts RMS at 1 ohm
  • Variable low-pass filter: 35–250 Hz, 12 dB/octave
  • Variable subsonic filter: 10–50 Hz, 12 dB/octave
  • Variable bass boost: 0–12 dB at 45 Hz
  • Frequency response: 10–250 Hz

Flexible inputs and protection

The amplifier includes a wired dash bass knob for quick level tweaks and supports both high-level speaker inputs and low-level RCA inputs, along with a 30A x 3 fuse setup. Physical size: 3.75" W x 1.75" H x 9" L.

  • Automatic turn-on and hi-level sensing
  • Direct short, thermal, and overload protection
  • Hybrid aluminum alloy heatsink for efficient heat management
  • 250 mV – 8 V high-level or low-level RCA input options

What’s in the box

Inside you’ll find the 1-channel amplifier, a comprehensive owners manual, spare 30A fuses, two 8" line-level input harnesses, and the wired remote bass knob with an 18 ft cable—everything you need to install right away.

Why choose Soundstream Reserve Series

Soundstream Reserve Series emphasizes today’s preferred features, from app-ready source options to premium digital amplification and dedicated subwoofers. The line is built around dealer support and detailed product information to help you tailor a setup that matches your goals.

Real-world use and fit

For compact trunk spaces or under-seat installations, this 1-channel amp can power a dedicated sub and shape bass to suit different music styles—from tight, controlled rhythms to punchy bass lines. The adjustable filters and bass boost provide practical controls without overwhelming complexity.

FAQ

Q: What power and impedance does the Soundstream RSM1.4000D support?

A: It delivers up to 4,000W peak and 1,200W RMS at 1Ω, enabling strong subwoofer performance with stable operation.

Q: What installation options and inputs are available?

A: Features RCA and hi-level inputs, automatic turn-on, and a wired bass knob for on-the-fly adjustments.

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