Skar Audio RP-350.1D 350W RMS Class D Monoblock Subwoofer Amplifier with Remote Bass Control

Small Footprint for Space-Constrained Installations

One of the biggest advantages of the RP-350.1D is its compact chassis.

As the smallest model in Skar Audio’s RP Series lineup described by the manufacturer, it provides a practical solution for vehicles where installation space is limited.

Ideal Installation Applications

• Compact cars and hatchbacks
• Small trunk-mounted subwoofer systems
• Custom amplifier racks
• Under-seat installations where clearance permits
• Daily-driver bass upgrades
• Factory stereo subwoofer additions
• Space-conscious audio builds

Despite its compact design, the amplifier still requires adequate ventilation.

Avoid mounting it in tightly enclosed compartments without sufficient airflow.

Efficient Class D MOSFET Amplification

The RP-350.1D uses Class D amplifier technology to deliver low-frequency output efficiently.

Class D designs generally waste less electrical energy as heat than comparable Class A/B amplifiers, making them especially useful for compact audio installations.

The amplifier also features a high-speed MOSFET power supply designed to support its internal electrical requirements.

Combined with an advanced PCB layout, this architecture helps deliver dependable performance in a small chassis.

Although the RP-350.1D has a relatively modest power rating compared with larger bass amplifiers, proper battery condition, wiring, and grounding remain essential.

1-Ohm Stable for Flexible Subwoofer Configurations

The Skar Audio RP-350.1D supports speaker loads as low as 1 ohm.

This provides flexibility when selecting compatible subwoofers and configuring voice-coil wiring.

Single-Subwoofer Systems

A single compatible subwoofer can provide a straightforward installation.

For example, a subwoofer rated around 350–400 watts RMS may be a reasonable candidate when its final impedance and operating requirements are compatible.

Dual-Subwoofer Systems

The RP-350.1D may also power two compatible lower-power subwoofers.

However, the amplifier’s total output is shared across the connected speakers.

Two subwoofers rated at 200 watts RMS each do not automatically receive 200 watts each from a 350W RMS amplifier.

Actual power distribution depends on the speaker wiring, impedance, and operating conditions.

Important: Always calculate the final impedance before connecting your subwoofer system. Do not wire the amplifier below its 1-ohm minimum rated load.

Selectable Bass EQ at 45 Hz

The RP-350.1D features an onboard bass EQ switch with three settings.

This allows you to customize low-frequency emphasis based on your listening preferences and subwoofer system.

However, bass boost increases the amplifier’s output demand around the selected frequency.

Excessive boost can contribute to clipping, subwoofer overexcursion, and thermal stress.

Pro Street Tip: Start with bass EQ at 0 dB. Correct enclosure design, crossover settings, and gain calibration are more important than maximum bass boost.

Variable Low-Pass Filter

The RP-350.1D includes a variable low-pass filter designed to control the upper-frequency content delivered to the connected subwoofer.

This helps prevent unwanted midrange frequencies from reaching a speaker intended primarily for bass reproduction.

For many aftermarket car audio systems, approximately 80 Hz is a useful initial crossover setting, provided the amplifier’s adjustment range supports it.

Final settings depend on the subwoofer, enclosure, and vehicle acoustics.

Variable Subsonic Filter

The RP-350.1D features a variable subsonic filter that reduces extremely low-frequency content.

This can be particularly useful with ported subwoofer enclosures.

At frequencies below a ported enclosure’s tuning point, cone movement can increase significantly while useful acoustic output decreases.

Proper subsonic filtering helps reduce unnecessary mechanical stress on the subwoofer.

Set the filter according to the subwoofer and enclosure manufacturer’s recommendations.

Adjustable Gain Control

The amplifier includes variable gain adjustment for matching input sensitivity to the connected head unit or signal processor.

Gain is not a volume control.

Turning the gain to maximum does not increase the amplifier’s clean rated power.

Incorrect gain settings can introduce clipping and potentially damage the connected subwoofer.

For best results, calibrate gain using an appropriate measurement method and the manufacturer’s installation instructions.

Remote Subwoofer Level Controller Included

The Skar Audio RP-350.1D includes a remote bass level controller that allows convenient adjustment from the driver’s seat.

This is particularly useful when switching between music genres or adjusting bass output for passengers.

The remote controller provides convenient level adjustment within the amplifier’s calibrated operating range.

It does not increase the amplifier’s maximum clean power output.

Four-Way Protection Circuitry

The RP-350.1D includes four-way protection circuitry designed to respond to abnormal electrical and thermal conditions.

Manufacturer-described protection features include safeguards associated with:

• Electrical short circuits
• Excessive amplifier temperatures
• Low supply voltage
• Additional abnormal electrical operating conditions

These features help protect the amplifier, but they do not replace proper installation, correct speaker impedance, or adequate ventilation.

Efficient Heatsink Design

The RP-350.1D incorporates an efficient heatsink design to help manage operating temperatures.

Thermal management is particularly important in compact amplifiers because their smaller housings provide less physical space for heat dissipation.

For best results, mount the amplifier in a secure location with adequate airflow.

Avoid covering the amplifier or placing it near excessive heat sources.

8-Gauge Power and Ground Terminals

The RP-350.1D features 8 AWG power and ground input terminals.

These connections accommodate appropriately sized amplifier wiring for supported installations.

Proper electrical connections help reduce voltage drop and support reliable operation.

Use manufacturer-recommended wiring sizes and install appropriate circuit protection near the battery.

Choose a clean, secure grounding point and verify all connections before powering the amplifier.

Pro Street Installation Tip: The amplifier’s terminal size does not determine the required fuse rating. Follow Skar Audio’s electrical specifications when selecting wiring and circuit protection.

Ideal for Entry-Level and Moderate-Power Subwoofer Systems

The Skar Audio RP-350.1D is a practical choice for enthusiasts who want to add bass without installing an unnecessarily large amplifier.

Potential applications include:

• Single 8-inch subwoofer systems
• Compatible 10-inch subwoofer installations
• Moderate-power 12-inch subwoofer setups
• Compact sealed enclosures
• Properly configured ported enclosures
• Factory stereo bass upgrades
• Daily-driver subwoofer installations

Subwoofer diameter alone does not determine compatibility.

Always match the amplifier to the subwoofer’s final impedance, RMS power handling, and enclosure requirements.

Factory Stereo and Aftermarket Head Unit Integration

The RP-350.1D can be integrated into many aftermarket and factory audio systems using appropriate signal connections and installation hardware.

Aftermarket Stereo Installation

For compatible aftermarket head units, connect the stereo’s subwoofer preamp output to the amplifier using suitable RCA cables.

Then connect the amplifier to the properly configured subwoofer system.

Factory Stereo Installation

If you’re retaining your factory radio, additional integration equipment may be required.

Depending on the vehicle, this may include a line output converter, digital signal processor, or factory amplifier integration interface.

The supplied specifications do not confirm integrated high-level speaker inputs, so do not assume factory speaker wires can connect directly to the amplifier.

DIY Stereo Wiring Diagrams and Installation Resources

Planning a Skar Audio RP-350.1D installation?

Before connecting an aftermarket amplifier, identify the correct factory stereo wiring, signal connections, and remote turn-on requirements.

My Pro Street Online provides vehicle-specific stereo wiring resources to help enthusiasts plan their audio upgrades.

Honda Civic Stereo Wiring

Use the Honda Civic Stereo Wiring Diagram when identifying factory radio and speaker connections.

Nissan 240SX Stereo Wiring

Building an S13 or S14 bass system? Reference the Nissan 240SX Stereo Wiring Diagram before integrating aftermarket equipment.

Nissan Altima Stereo Upgrade

Consult the Nissan Altima Stereo Wiring Diagram when planning factory stereo integration.

Explore additional DIY audio wiring tutorials at My Pro Street Online.

Pro Street Installation Tip: Factory stereo wiring diagrams help identify audio signals, but the RP-350.1D requires its own properly fused battery power connection and secure ground.

Skar Audio RP-350.1D Technical Specifications

Installation Tips for the Skar Audio RP-350.1D

Before installation, calculate the final impedance of your subwoofer configuration.

Verify that the connected subwoofer system can safely handle the intended RMS output.

Choose a secure mounting location with adequate ventilation.

Use appropriately sized power and ground wiring according to Skar Audio’s installation instructions.

Install suitable circuit protection close to the battery.

Connect a compatible audio signal from the head unit or signal processor.

Verify subwoofer polarity and wiring before powering the system.

Start with bass EQ disabled and set gain using an appropriate calibration method.

Configure the low-pass and subsonic filters according to the connected subwoofer and enclosure.

Connect the included remote bass level controller and verify its operation.

Monitor vehicle voltage during initial testing, particularly when operating the amplifier at 1 ohm.

Why Choose the Skar Audio RP-350.1D?

The Skar Audio RP-350.1D combines efficient Class D amplification, compact construction, and practical bass tuning features in an affordable monoblock design.

Its 350W RMS rating at 1 ohm provides useful power for compatible entry-level and moderate-power subwoofer systems.

The high-speed MOSFET power supply, advanced PCB layout, efficient heatsink, and four-way protection circuitry support everyday operation.

Variable low-pass and subsonic filters, selectable bass EQ, and the included remote bass controller provide flexibility for enthusiasts who want to customize their bass performance.

For drivers looking to add dedicated subwoofer power without installing an oversized amplifier, the RP-350.1D is an excellent option.

Upgrade Your Bass with Pro Street Online

Bring deeper bass to your vehicle with the Skar Audio RP-350.1D 350W RMS Class D Monoblock Amplifier.

Pair it with a properly matched subwoofer, quality amplifier wiring, and the correct stereo integration hardware for your vehicle.

Explore more car audio amplifiers, subwoofers, aftermarket head units, and installation accessories at Pro Street Online.